# List of syndromes

This is an alphabetically sorted list of medical syndromes.
* 1p36 deletion syndrome
* 1q21.1 deletion syndrome
* 1q21.1 duplication syndrome
* 13q deletion syndrome
* 17q21.31 microdeletion syndrome
* 22q11.2 distal deletion syndrome
* 22q11.2 duplication syndrome
* 22q13 deletion syndrome
* 2p15-16.1 microdeletion syndrome
* 2q37 deletion syndrome
* 3-M syndrome
* 3C syndrome
* 3q29 microdeletion syndrome
* 49,XXXXY
* 4D syndrome
* 8p23.1 duplication syndrome
* 9q34 deletion syndrome

## A

* Aagenaes syndrome
* Aarskog–Scott syndrome
* Aase syndrome
* Abandoned child syndrome
* ABCD syndrome
* Abdallat–Davis–Farrage syndrome
* Abderhalden–Kaufmann–Lignac syndrome
* Abdominal compartment syndrome
* Ablepharon macrostomia syndrome
* Abruzzo–Erickson syndrome
* Achard syndrome
* Achard–Thiers syndrome
* Ackerman syndrome
* Acorea, microphthalmia and cataract syndrome
* Acrocallosal syndrome
* Acropectoral syndrome
* Acro–dermato–ungual–lacrimal–tooth syndrome
* Activation syndrome
* Acute aortic syndrome
* Acute brain syndrome
* Acute chest syndrome
* Acute coronary syndrome
* Acute HME syndrome
* Acute interstitial pneumonitis
* Acute motor axonal neuropathy
* Acute radiation syndrome
* Acute respiratory distress syndrome
* Acute retroviral syndrome
* Adams–Nance syndrome
* Adams–Oliver syndrome
* Adams–Stokes syndrome
* Adducted thumb syndrome
* Adie syndrome
* Adiposogenital dystrophy
* Adult-onset immunodeficiency syndrome
* Advanced sleep phase disorder
* Aerotoxic syndrome
* Afferent loop syndrome
* Aicardi syndrome
* Aicardi–Goutières syndrome
* AIDS dysmorphic syndrome
* Al-Raqad syndrome
* Alagille syndrome
* Albinism–deafness syndrome
* Alcohol withdrawal syndrome
* Alezzandrini syndrome
* Alice in Wonderland syndrome
* Alien hand syndrome
* Allan–Herndon–Dudley syndrome
* Allopurinol hypersensitivity syndrome
* Alopecia contractures dwarfism mental retardation syndrome
* Alpha-thalassemia mental retardation syndrome
* Alport syndrome
* Alström syndrome
* Alvarez' syndrome
* Amniotic band constriction
* Amotivational syndrome
* Amplified musculoskeletal pain syndromes
* Andermann syndrome
* Andersen–Tawil syndrome
* Androgen insensitivity syndrome
* Angelman syndrome
* ANOTHER syndrome
* Anterior cerebral artery syndrome
* Anterior compartment syndrome
* Anterior cutaneous nerve entrapment syndrome
* Anterior interosseous syndrome
* Anterior spinal artery syndrome
* Anticonvulsant hypersensitivity syndrome
* Antidepressant discontinuation syndrome
* Antiphospholipid syndrome
* Antisynthetase syndrome
* Antley–Bixler syndrome
* Anton–Babinski syndrome
* Aortic arch syndrome
* Aortocaval compression syndrome
* Apert syndrome
* Apparent mineralocorticoid excess syndrome
* Arakawa's syndrome II
* Ardalan–Shoja–Kiuru syndrome
* AREDYLD syndrome
* Aromatase excess syndrome
* Arterial tortuosity syndrome
* Arthrogryposis–renal dysfunction–cholestasis syndrome
* Arts syndrome
* Ascher's syndrome
* Asherman's syndrome
* Asperger syndrome
* Asymmetric crying facies
* Ataxia-pancytopenia syndrome
* Ataxia-telangiectasia
* Athletic heart syndrome
* Athymhormic syndrome
* ATR-16 syndrome
* Atrophodermia vermiculata
* Atypical hemolytic uremic syndrome
* Austrian syndrome
* Autoimmune disease
* Autoimmune lymphoproliferative syndrome
* Autoimmune polyendocrine syndrome type 1
* Autoimmune polyendocrine syndrome type 2
* Autoimmune polyendocrine syndrome type 3
* Autoimmune polyendocrine syndrome
* Autoinflammatory syndromes
* Avellis syndrome
* Axenfeld syndrome
* Axial spondyloarthritis
* Ayazi syndrome

## B

* Babinski–Nageotte syndrome
* Baboon syndrome
* Baggio–Yoshinari syndrome
* Baller–Gerold syndrome
* Bamforth–Lazarus syndrome
* Bangstad syndrome
* Bannayan–Riley–Ruvalcaba syndrome
* Banti's syndrome
* Barakat syndrome
* Barakat-Perenthaler syndrome
* Bardet–Biedl syndrome
* Bare lymphocyte syndrome type II
* Bare lymphocyte syndrome
* Barlow's syndrome
* Barraquer–Simons syndrome
* Bart syndrome
* Bartter syndrome
* Bart–Pumphrey syndrome
* Bassen-Kornzweig syndrome
* Battered person syndrome
* Bazex–Dupré–Christol syndrome
* Beare–Stevenson cutis gyrata syndrome
* Beckwith–Wiedemann syndrome
* Behcet's syndrome
* Behr syndrome
* Benedikt syndrome
* Benign fasciculation syndrome
* Benjamin syndrome
* Benzodiazepine withdrawal syndrome
* Berdon syndrome
* Berk–Tabatznik syndrome
* Bernard–Soulier syndrome
* Berserk llama syndrome
* Bhaskar–Jagannathan syndrome
* Biemond syndrome
* Bilious vomiting syndrome
* Binder's syndrome
* Bing–Neel syndrome
* Birt–Hogg–Dubé syndrome
* Björnstad syndrome
* Bland-White-Garland syndrome
* Blau syndrome
* Blepharophimosis, ptosis, epicanthus inversus syndrome
* Blind loop syndrome
* Bloom syndrome
* Blount's disease
* Blue baby syndrome
* Blue diaper syndrome
* Blue rubber bleb nevus syndrome
* Blue toe syndrome
* Bobble-head doll syndrome
* Body fat redistribution syndrome
* Boerhaave syndrome
* Bogart–Bacall syndrome
* Bohring–Opitz syndrome
* Bonnet–Dechaume–Blanc syndrome
* Bowen–Conradi syndrome
* Brachycephalic airway obstructive syndrome
* Brainstem stroke syndrome
* Branchio-oculo-facial syndrome
* Branchio-oto-renal syndrome
* Bromism
* Brown's syndrome
* Brown-Séquard syndrome
* Brown–Vialetto–Van Laere syndrome
* Bruck syndrome
* Brugada syndrome
* Brunner syndrome
* Budd–Chiari syndrome
* Burning feet syndrome
* Burning mouth syndrome
* Burnside–Butler syndrome
* Buschke–Ollendorff syndrome
* Bálint's syndrome
* Börjeson-Forssman-Lehmann syndrome

## C

* CADASIL
* Camera-Marugo-Cohen syndrome
* CAMFAK syndrome
* Camptodactyly-arthropathy-coxa vara-pericarditis syndrome
* Cancer syndrome
* Cancer-related fatigue
* CANDLE syndrome
* Canine epileptoid cramping syndrome
* Cannabinoid hyperemesis syndrome (CHS)
* Cantú syndrome
* Capgras delusion
* Capgras syndrome
* Capillary leak syndrome
* Caplan's syndrome
* Carcinoid syndrome
* Cardiac syndrome X
* Cardiofaciocutaneous syndrome
* Cardiorenal syndrome
* Cardiovascular syndrome
* Carney complex
* Caroli disease
* Carpal tunnel syndrome
* Carpenter syndrome
* Cat eye syndrome
* Cataract-microcornea syndrome
* Catastrophic antiphospholipid syndrome
* Catel–Manzke syndrome
* Cauda equina syndrome
* Caudal regression syndrome
* CDK13-related disorder
* Celebrity worship syndrome
* Central centrifugal cicatricial alopecia
* Central cord syndrome
* Central nervous system syndrome
* Central pain syndrome
* Centurion syndrome
* Cerebellar cognitive affective syndrome
* Cerebellar stroke syndrome
* Cerebellopontine angle syndrome
* Cerebral salt-wasting syndrome
* Cervicocranial syndrome
* Charcot–Marie–Tooth disease
* CHARGE syndrome
* Charles Bonnet syndrome
* Chiari–Frommel syndrome
* Chiasmal syndrome
* Chilaiditi syndrome
* Child sexual abuse accommodation syndrome
* CHILD syndrome
* childhood myelodysplastic syndrome
* Childhood tumor syndrome
* Chinese Restaurant Syndrome
* Chromosomal deletion syndrome
* Chromosome 5q deletion syndrome
* Chronic fatigue syndrome
* Chronic functional abdominal pain
* Chronic infantile neurologic cutaneous and articular syndrome
* Chronic Lyme disease
* Chronic prostatitis/chronic pelvic pain syndrome
* Churg–Strauss syndrome
* Chédiak–Higashi syndrome
* Claude's syndrome
* Clinically isolated syndrome
* CLOVES syndrome
* COACH syndrome
* Cobb syndrome
* Cockayne syndrome
* Coffin–Lowry syndrome
* Coffin–Siris syndrome
* Cogan syndrome
* Cohen syndrome
* Compartment syndrome
* Complement deficiency
* Complete androgen insensitivity syndrome
* Complex regional pain syndrome
* Computer vision syndrome
* Conductive deafness-ptosis-skeletal anomalies syndrome
* Congenital bilateral perisylvian syndrome
* Congenital contractural arachnodactyly
* Congenital generalized lipodystrophy
* Congenital insensitivity to pain
* Congenital myasthenic syndrome
* Congenital nephrotic syndrome
* Congenital rubella syndrome
* Conn's syndrome
* Conorenal syndrome
* Conradi–Hünermann syndrome
* Constriction ring syndrome
* Contiguous gene syndrome
* Conus medullaris syndrome
* Cooks syndrome
* Cord colitis syndrome
* Corneal-cerebellar syndrome
* Corneal dystrophy-perceptive deafness syndrome
* Cornelia de Lange Syndrome
* Corneodermatoosseous syndrome
* Coronary steal
* Costeff syndrome
* Costello syndrome
* Cotard delusion
* Cotard's Syndrome
* Cotton fever
* Cowden syndrome
* Cracked tooth syndrome
* Cramp fasciculation syndrome
* Crandall syndrome
* Craniosynostosis–anal anomalies–porokeratosis syndrome
* Cranio-lenticulo-sutural dysplasia
* CREST syndrome
* Cri du chat
* Crigler–Najjar syndrome
* Crome syndrome
* Cronkhite–Canada syndrome
* Cross syndrome
* Crouzon syndrome
* Crouzonodermoskeletal syndrome
* Crush syndrome
* Cruveilhier-Baumgarten syndrome
* Cryopyrin-associated periodic syndrome
* Cryptorchidism-arachnodactyly-intellectual disability syndrome
* Cuboid syndrome
* Currarino syndrome
* Cushing's syndrome
* Cyclic vomiting syndrome
* Cytokine release syndrome

## D

* Da Costa's syndrome
* Daentl Townsend Siegel syndrome
* Dahlberg Borer Newcomer syndrome
* Dandy–Walker syndrome
* De Barsy syndrome
* de Clérambault's syndrome
* De Quervain syndrome
* De Winter syndrome
* Dead arm syndrome
* Deficiency of the interleukin-1–receptor antagonist
* Degenerative disc disease
* Dejerine–Roussy syndrome
* Delayed sleep phase disorder
* Delusional misidentification syndrome
* Delusional parasitosis
* Dennie–Marfan syndrome
* Dentomandibular sensorimotor dysfunction
* Denys–Drash syndrome
* DeSanctis–Cacchione syndrome
* Descending perineum syndrome
* Diabetic stiff hand syndrome
* Dialysis disequilibrium syndrome
* Diencephalic syndrome
* Diffuse infiltrative lymphocytosis syndrome
* DiGeorge syndrome
* Diogenes syndrome
* Diploid-triploid mosaicism
* Disconnection syndrome
* Distal 18q-
* Distal intestinal obstruction syndrome
* Distal trisomy 10q
* Doege–Potter syndrome
* Donnai–Barrow syndrome
* Donohue syndrome
* DOOR syndrome
* Dopamine dysregulation syndrome
* Down syndrome
* Dravet syndrome
* Dressler syndrome
* Drug reaction with eosinophilia and systemic symptoms
* Dry eye syndrome
* Duane syndrome
* Duane-radial ray syndrome
* Dubin–Johnson syndrome
* Dubowitz syndrome
* Dumping syndrome
* Dysexecutive syndrome
* Dyskeratosis congenita
* Dysplastic nevus syndrome

## E

* Eagle syndrome
* Ectrodactyly–ectodermal dysplasia–cleft syndrome
* Edwards syndrome
* EEM syndrome
* Egg drop syndrome
* Ehlers–Danlos syndrome
* Eiken syndrome
* Einstein syndrome
* Eisenmenger's syndrome
* Eldomery-Sutton syndrome
* Elejalde syndrome
* Ellis–van Creveld syndrome
* Emanuel syndrome
* Empty nest syndrome
* Empty nose syndrome
* Empty sella syndrome
* Enlarged vestibular aqueduct syndrome
* Environmental dependency syndrome
* Eosinophilia–myalgia syndrome
* Eosinophilic cellulitis
* Epidermal nevus syndrome
* Epilepsy syndromes
* Episodic dyscontrol syndrome
* Epizootic ulcerative syndrome
* Erdheim–Chester disease
* Erondu–Cymet syndrome
* Estrogen insensitivity syndrome
* Euthyroid sick syndrome
* Evans syndrome
* Excess ovarian androgen release syndrome
* Exploding head syndrome
* Extrapyramidal symptoms

## F

* FACES syndrome
* Facet syndrome
* Facial Onset Sensory Motor Neuropathy syndrome
* Fahr's syndrome
* Failed back syndrome
* Familial cold autoinflammatory syndrome
* Familial Mediterranean fever
* Familial partial lipodystrophy
* Familial Adenomatous Polyposis
* Fanconi syndrome
* Favre–Racouchot syndrome
* Febrile infection-related epilepsy syndrome
* Febrile neutrophilic dermatosis
* Fechtner syndrome
* Feingold syndrome
* Feline hyperesthesia syndrome
* Felty's syndrome
* Femur fibula ulna syndrome
* Fetal alcohol syndrome
* Fetal hydantoin syndrome
* Fetal trimethadione syndrome
* Fetal valproate syndrome
* Fetal warfarin syndrome
* FG syndrome
* Fibrinolysis syndrome
* Fibromyalgia syndrome
* Fibromyalgia
* First arch syndrome
* Fish acute toxicity syndrome
* Fitz-Hugh–Curtis syndrome
* Fitzsimmons–Guilbert syndrome
* Flammer syndrome
* Fleischer's syndrome
* Floating–Harbor syndrome
* Floppy eyelid syndrome
* Floppy trunk syndrome
* Florid cutaneous papillomatosis
* Flynn–Aird syndrome
* Foal immunodeficiency syndrome
* Foerster's syndrome
* Foix–Alajouanine syndrome
* Foix–Chavany–Marie syndrome
* Folie à deux
* Follicle-stimulating hormone insensitivity
* Forbes-Albright syndrome
* Foreign accent syndrome
* Foster–Kennedy syndrome
* Fountain syndrome
* Foville's syndrome
* Fragile X syndrome
* Fragile X-associated tremor/ataxia syndrome
* Franceschetti–Klein syndrome
* Frank–ter Haar syndrome
* Fraser syndrome
* Frasier syndrome
* Freeman–Sheldon syndrome
* Frey's syndrome
* Froin's syndrome
* Fryns syndrome
* Functional somatic syndrome

## G

* Gaisböck syndrome
* Galloway Mowat syndrome
* GAPO syndrome
* Gardner's syndrome
* Gastric outlet obstruction
* Gastrocutaneous syndrome
* Gastrointestinal syndrome
* Genitopatellar syndrome
* Gerstmann syndrome
* Gerstmann–Sträussler–Scheinker syndrome
* Geschwind syndrome
* Gianotti–Crosti syndrome
* Giant platelet disorder
* Guillain–Barré syndrome
* Gillespie syndrome
* Gitelman syndrome
* Gleich's syndrome
* GMS syndrome
* Goldberg–Shprintzen syndrome
* Goldenhar syndrome
* Gomez and López-Hernández syndrome
* Gonadotropin insensitivity
* Gonadotropin-releasing hormone insensitivity
* Goodpasture syndrome
* Gordon syndrome
* Gougerot–Blum syndrome
* Gourmand syndrome
* Gouverneur's syndrome
* GRACILE syndrome
* Graham-Little syndrome
* Gray baby syndrome
* Gray platelet syndrome
* Greater trochanteric pain syndrome
* Green nail syndrome
* Greig cephalopolysyndactyly syndrome
* Grinspan's syndrome
* Griscelli syndrome type 2
* Griscelli syndrome type 3
* Griscelli syndrome
* Grisel's syndrome
* Growing teratoma syndrome
* Gilbert's syndrome
* Gulf War syndrome

## H

* Haber syndrome
* Hagemoser–Weinstein–Bresnick syndrome
* Haglund's syndrome
* Haim–Munk syndrome
* Hajdu–Cheney syndrome
* Halal syndrome
* Hallermann–Streiff syndrome
* Hamman's syndrome
* Hamman-Rich syndrome
* Hand-foot-genital syndrome
* Handigodu syndrome
* Hanhart syndrome
* Hantavirus pulmonary syndrome
* Hapnes Boman Skeie syndrome
* Harlequin syndrome
* Harris platelet syndrome
* Harrison syndrome
* Havana syndrome
* Hay–Wells syndrome
* Hearing loss with craniofacial syndromes
* HEC syndrome
* Heel pad syndrome
* Heel spur syndrome
* Heerfordt syndrome
* HELLP syndrome
* Hemihyperplasia–multiple lipomatosis syndrome
* Hemimegalencephaly
* Hemispatial neglect
* Hemoglobin Lepore syndrome
* Hemolytic-uremic syndrome
* Hennekam syndrome
* Hepatopulmonary syndrome
* Hepatorenal syndrome
* Hereditary breast–ovarian cancer syndrome
* Hereditary hyperbilirubinemia
* Hereditary leiomyomatosis and renal cell cancer syndrome
* Hereditary neuralgic amyotrophy
* Hereditary nonpolyposis colorectal cancer
* Hermansky–Pudlak syndrome
* Hero syndrome
* Heyde's syndrome
* High-rise syndrome
* HIV/AIDS
* Holiday heart syndrome
* Holt–Oram syndrome
* Horn-Kolb syndrome
* Horner's syndrome
* Howel–Evans syndrome
* Hoyeraal-Hreidarsson syndrome
* Ho–Kaufman–Mcalister syndrome
* Hughes–Stovin syndrome
* Hunan hand syndrome
* Hunter syndrome
* Huntington's disease-like syndrome
* HUPRA syndrome
* Hurler syndrome
* Hurler–Scheie syndrome
* Hutchinson–Gilford progeria syndrome
* Hydrolethalus syndrome
* Hyper IgM syndrome
* Hyper-IgD syndrome
* Hyper-IgM syndrome type 1
* Hyper-IgM syndrome type 2
* Hyper-IgM syndrome type 3
* Hyper-IgM syndrome type 4
* Hyper-IgM syndrome type 5
* Hyperimmunoglobulin D syndrome
* Hyperimmunoglobulin E syndrome
* Hypermobility syndrome
* Hyperosmolar syndrome
* Hyperprolactinaemia
* Hyperprolactinemic SAHA syndrome
* Hypertension and brachydactyly syndrome
* Hypertrichosis cubiti
* Hyperventilation syndrome
* Hyperviscosity syndrome
* Hypohidrotic ectodermal dysplasia
* Hypoplastic left heart syndrome
* Hypoplastic right heart syndrome
* Hypotonia
* Hypotrichosis–acro-osteolysis–onychogryphosis–palmoplantar keratoderma–periodontitis syndrome
* Hypotrichosis–lymphedema–telangiectasia syndrome
* Hystrix-like ichthyosis–deafness syndrome

## I

* Ichthyosis follicularis with alopecia and photophobia syndrome
* Ichthyosis prematurity syndrome
* Idiopathic pneumonia syndrome
* Idiopathic postprandial syndrome
* Idiopathic pure sudomotor failure
* Iliotibial band syndrome
* Imerslund–Gräsbeck syndrome
* Immersion foot syndromes
* Immune reconstitution inflammatory syndrome
* Immunodeficiency–centromeric instability–facial anomalies syndrome
* Impingement syndrome
* Imposter syndrome
* Incontinentia pigmenti
* Infant respiratory distress syndrome
* Inferior vena cava syndrome
* Infertility in polycystic ovary syndrome
* Influenza-like illness
* Institutional syndrome
* Intersection syndrome
* Interstitial cystitis
* Intracranial hypertension syndrome
* Intraoperative floppy iris syndrome
* Intravenous marijuana syndrome
* IPEX syndrome
* Iridocorneal endothelial syndrome
* Irlen syndrome
* Irregular sleep–wake rhythm
* irritable bladder syndrome
* Irritable bowel syndrome
* Irritable male syndrome
* Irukandji syndrome
* Irvine–Gass syndrome

## J

* Jackson–Weiss syndrome
* Jacobsen syndrome
* Jaffe–Campanacci syndrome
* Jalili syndrome
* Jansen's metaphyseal chondrodysplasia
* Janz syndrome
* Jeavons syndrome
* Jervell and Lange-Nielsen syndrome
* Johanson–Blizzard syndrome
* Johnson–McMillin syndrome
* Johnson–Munson syndrome
* Joubert syndrome
* Juberg-Hellman syndrome
* Jugular foramen syndrome
* Juvenile polyposis syndrome
* Jerusalem syndrome

## K

* Kabuki syndrome
* Kallmann syndrome
* Kapur–Toriello syndrome
* Karak syndrome
* Karsch-Neugebauer syndrome
* Kartagener's syndrome
* Kasabach–Merritt syndrome
* Katz syndrome
* Kaufman oculocerebrofacial syndrome
* Kearns–Sayre syndrome
* Keppen–Lubinsky syndrome
* Keratitis–ichthyosis–deafness syndrome
* Keratosis linearis with ichthyosis congenita and sclerosing keratoderma syndrome
* Keutel syndrome
* Khyâl cap
* Kimmelstiel-Wilson syndrome
* Kindler syndrome
* King–Kopetzky syndrome
* Kleine–Levin syndrome
* Klinefelter syndrome
* Klippel–Feil syndrome
* Klippel–Trénaunay syndrome
* Klüver–Bucy syndrome
* Knobloch syndrome
* Kocher–Debre–Semelaigne syndrome
* Kohlschütter-Tönz syndrome
* Korsakoff's syndrome
* Kostmann syndrome
* Kounis syndrome
* Kowarski syndrome
* Kufor–Rakeb syndrome
* König's syndrome

## L

* Lachiewicz–Sibley syndrome
* Lacunar Stroke Syndrome
* Lambert–Eaton myasthenic syndrome
* Landau–Kleffner syndrome
* Langer–Giedion syndrome
* Laron syndrome
* Larsen syndrome
* Laryngoonychocutaneous syndrome
* Lateral medullary syndrome
* Lateral meningocele syndrome
* Lateral pontine syndrome
* Laugier–Hunziker syndrome
* Laurence–Moon syndrome
* Lavender foal syndrome
* Lawrence–Seip syndrome
* Lazarus syndrome
* Leaky gut syndrome
* Legg–Calvé–Perthes disease
* Legius syndrome
* Leiner's disease
* Lelis syndrome
* Lemierre's syndrome
* Lennox–Gastaut syndrome
* Lenz microphthalmia syndrome
* Lenz–Majewski syndrome
* Leriche's syndrome
* Leschke syndrome
* Lesch–Nyhan syndrome
* Lethal congenital contracture syndrome
* Lethal white syndrome
* Leukotriene receptor antagonist-associated Churg–Strauss syndrome
* Levator ani syndrome
* Leydig cell hypoplasia
* Liddle's syndrome
* Liebenberg syndrome
* LIG4 syndrome
* Lima syndrome
* Limb girdle syndrome
* Limber tail syndrome
* Limb–mammary syndrome
* Linburg–Comstock syndrome
* Li–Fraumeni syndrome
* Locked-in syndrome
* Locomotive syndrome
* Loeys–Dietz syndrome
* Loin pain hematuria syndrome
* Long COVID
* Long face syndrome
* Long QT syndrome
* Loose anagen syndrome
* Lown–Ganong–Levine syndrome
* Lowry–MacLean syndrome
* Lucey–Driscoll syndrome
* Lujan–Fryns syndrome
* Lutembacher's syndrome
* Lymphangitis carcinomatosa
* Lymphedema–distichiasis syndrome
* Lynch syndrome
* Lyngstadaas syndrome
* Löffler's syndrome
* Löfgren syndrome

## M

* M74 syndrome
* Macrocephaly-capillary malformation
* Macrophage activation syndrome
* Maffucci syndrome
* Majeed syndrome
* Majewski's polydactyly syndrome
* Mal de debarquement
* Malformative syndrome
* Mallory–Weiss syndrome
* Malnutrition–inflammation complex
* Malouf syndrome
* Malpuech facial clefting syndrome
* Management of chronic headaches
* Manning criteria
* Marchiafava–Bignami disease
* Marden–Walker syndrome
* Mare reproductive loss syndrome
* Marfan syndrome
* Marfanoid–progeroid–lipodystrophy syndrome
* Marie Antoinette syndrome
* Marinesco–Sjögren syndrome
* Maroteaux–Lamy syndrome
* Marshall syndrome
* Marshall–Smith syndrome
* Marshall–White syndrome
* MASA syndrome
* Mast cell activation syndrome
* Mauriac syndrome
* Mayer–Rokitansky–Küster–Hauser syndrome
* May–Thurner syndrome
* May–White syndrome
* McArdle syndrome
* McCune–Albright syndrome
* McCusick syndrome
* McGillivray syndrome
* McKittrick–Wheelock syndrome
* McKusick–Kaufman syndrome
* McLeod syndrome
* MDP syndrome
* Mean world syndrome
* Meckel syndrome
* Meconium aspiration syndrome
* Medial medullary syndrome
* Medial pontine syndrome
* Median arcuate ligament syndrome
* Medical students' disease
* MEDNIK syndrome
* Megavitamin-B$_6$ syndrome
* Meige's syndrome
* Meigs' syndrome
* MELAS syndrome
* Melkersson–Rosenthal syndrome
* Melnick–Needles syndrome
* Memory distrust syndrome
* Mendelson's syndrome
* Ménière's disease
* Menkes disease
* MERRF syndrome
* Metabolic syndrome
* Michelin tire baby syndrome
* Michels Caskey syndrome
* Michels syndrome
* Mickleson syndrome
* Micro syndrome
* Microdeletion syndrome
* Microphthalmia–dermal aplasia–sclerocornea syndrome
* Middle cerebral artery syndrome
* Middle child syndrome
* Middle East respiratory syndrome
* Mikulicz syndrome
* Mild androgen insensitivity syndrome
* Milk-alkali syndrome
* Millard–Gubler syndrome
* Miller Fisher syndrome
* Miller syndrome
* Miller–Dieker syndrome
* Milroy's disease
* Milwaukee shoulder syndrome
* Mirhosseini–Holmes–Walton syndrome
* Mirizzi's syndrome
* Mirror syndrome
* Mismatch repair cancer syndrome
* Mitochondrial DNA depletion syndrome
* Mitochondrial neurogastrointestinal encephalopathy syndrome
* Mitral valve prolapse
* Mittelschmerz
* Mohr–Tranebjærg syndrome
* MOMO syndrome
* Monofixation syndrome
* MonoMAC
* Morgagni Stewart Morel syndrome
* MORM syndrome
* Morquio syndrome
* Morvan's syndrome
* Mouth and genital ulcers with inflamed cartilage syndrome
* Mowat–Wilson syndrome
* Moyamoya disease
* Moynahan syndrome
* Muckle–Wells syndrome
* Muenke syndrome
* Muir–Torre syndrome
* Mukamel syndrome
* Multiple endocrine neoplasia type 1
* Multiple endocrine neoplasia type 2
* Multiple evanescent white dot syndrome
* Multiple hamartoma syndrome
* Multiple organ dysfunction syndrome
* Multiple pterygium syndrome
* Munchausen syndrome
* Mungan syndrome
* Musical ear syndrome
* Mycosis fungoides
* Myelodysplastic syndrome
* Myoclonic astatic epilepsy
* Myofascial pain syndrome
* Myomatous erythrocytosis syndrome
* Möbius syndrome
* Müllerian agenesis

## N

* Nablus mask-like facial syndrome
* Naegeli–Franceschetti–Jadassohn syndrome
* Nager acrofacial dysostosis
* Nail–patella syndrome
* Nakajo syndrome
* Nance–Horan syndrome
* Napoleonist Syndrome
* Nasodigitoacoustic syndrome
* Naxos syndrome
* Nelson's syndrome
* NEMO deficiency syndrome
* Neonatal ichthyosis–sclerosing cholangitis syndrome
* Nephritic syndrome
* Nephrotic syndrome
* Nerve compression syndrome
* Netherton syndrome
* Neu–Laxova syndrome
* Neuro-cardio-facial-cutaneous syndromes
* Neurofibromatosis type I
* Neuroleptic malignant syndrome
* Neuroleptic-Induced Deficit Syndrome
* Neutrophil immunodeficiency syndrome
* Nevo syndrome
* Nevoid basal-cell carcinoma syndrome
* Nezelof syndrome
* Nicolaides–Baraitser syndrome
* Nicolau–Balus syndrome
* Night eating syndrome
* Nijmegen breakage syndrome
* Njølstad syndrome
* Nodding disease
* Non-24-hour sleep–wake disorder
* Noonan syndrome with multiple lentigines
* Noonan syndrome
* Norman–Roberts syndrome
* Northern epilepsy syndrome
* Nutcracker syndrome

## O

* Occipital horn syndrome
* Ocular ischemic syndrome
* Oculo-respiratory syndrome
* Oculoauricular syndrome
* Oculocerebrocutaneous syndrome
* Oculocerebrorenal syndrome
* Oculofaciocardiodental syndrome
* Oculomucocutaneous syndrome
* Odontoma dysphagia syndrome
* Odonto–tricho–ungual–digital–palmar syndrome
* Ogden Syndrome
* Ogilvie syndrome
* Ohtahara syndrome
* Olfactory reference syndrome
* Oliver–McFarlane syndrome
* Omenn syndrome
* One and a half syndrome
* Oneiroid syndrome
* Opitz G/BBB Syndrome
* Opsoclonus myoclonus syndrome
* Oral allergy syndrome
* Oral mite anaphylaxis
* Oral-facial-digital syndrome
* Orbital apex syndrome
* Organic brain syndrome
* Organic dust toxic syndrome
* Orofaciodigital syndrome 1
* Ortner's syndrome
* OSLAM syndrome
* Osler–Weber–Rendu disease
* Otodental syndrome
* Otofacial syndrome
* Ovarian hyperstimulation syndrome
* Ovarian vein syndrome
* Overgrowth syndrome
* Overlap syndrome

## P

* Pacak–Zhuang syndrome
* Pacemaker syndrome
* Painful bruising syndrome
* Pallister–Hall syndrome
* Pallister–Killian syndrome
* Panayiotopoulos syndrome
* Pancoast tumor
* Pantothenate kinase-associated neurodegeneration
* PAPA syndrome
* Papillon–Lefèvre syndrome
* Papillorenal syndrome
* Papular purpuric gloves and socks syndrome
* Paraneoplastic acrokeratosis
* Paraneoplastic cerebellar degeneration
* Paraneoplastic syndrome
* Parental alienation syndrome
* Parinaud's oculoglandular syndrome
* Parinaud's syndrome
* Paris-Trousseau syndrome
* Parkes Weber syndrome
* Parkinson plus syndrome
* Paroxysmal hand hematoma
* Paroxysmal tachycardia
* Parry–Romberg syndrome
* Parsonage–Turner syndrome
* Partial androgen insensitivity syndrome
* Pashayan syndrome
* Patau syndrome
* Patellar subluxation syndrome
* Patellofemoral pain syndrome
* Patterson syndrome
* Pearson syndrome
* PANDAS
* Peeling skin syndrome
* PEHO syndrome
* Pellegrini–Stieda syndrome
* Pelvic congestion syndrome
* Pelvic pain
* Pemphigus erythematosus
* Pendred syndrome
* Penile Artery Shunt Syndrome
* Pentalogy of Cantrell
* Periodic fever syndrome
* Periodic fever, aphthous stomatitis, pharyngitis and adenitis
* Perisylvian syndrome
* Perlman syndrome
* Persistent adrenarche syndrome
* Persistent genital arousal disorder
* Persistent Müllerian duct syndrome
* Pervasive refusal syndrome
* Peters-plus syndrome
* Peutz–Jeghers syndrome
* Pfeiffer syndrome
* Phantom eye syndrome
* Phantom limb
* Phantom vibration syndrome
* Phelan-McDermid Syndrome
* Pickwickian syndrome
* Pigment dispersion syndrome
* Pigmented hairy epidermal nevus syndrome
* Pilotto syndrome
* Piriformis syndrome
* Pitt–Hopkins syndrome
* Plica syndrome
* Plummer–Vinson syndrome
* POEMS syndrome
* Poland syndrome
* Polar T3 syndrome
* Polio-like syndrome
* Polycystic ovary syndrome
* Popliteal artery entrapment syndrome
* Popliteal pterygium syndrome
* Porcine stress syndrome
* Pork–cat syndrome
* Post-micturition convulsion syndrome
* Post-nasal drip syndrome
* Post-traumatic stress syndrome
* Post-acute-withdrawal syndrome
* Post-concussion syndrome
* Post-Ebola virus syndrome
* Post-intensive care syndrome
* Post-maturity syndrome
* Post-polio syndrome
* Post-thrombotic syndrome
* Post-vasectomy pain syndrome
* Postcardiotomy syndrome
* Postcholecystectomy syndrome
* Posterior cerebral artery syndrome
* Posterior cord syndrome
* Posterior rami syndrome
* Posterior reversible encephalopathy syndrome
* Postgastrectomy syndromes
* Postorgasmic illness syndrome
* Postperfusion syndrome
* Postpericardiotomy syndrome
* Postural orthostatic tachycardia syndrome
* Potocki–Lupski syndrome
* Potocki–Shaffer syndrome
* Potter sequence
* Prader–Willi syndrome
* Pre-excitation syndrome
* Precordial catch syndrome
* Premenstrual syndrome
* Presumed ocular histoplasmosis syndrome
* Pretzel syndrome
* Primary pigmented nodular adrenocortical disease
* Primrose syndrome
* Progeroid syndromes
* Progressive supranuclear palsy
* Prolonged grief disorder
* Pronator teres syndrome
* Propofol infusion syndrome
* Proteus syndrome
* Proteus-like syndrome
* Prune belly syndrome
* Pseudo-Cushing's syndrome
* Pseudodementia
* Pseudoexfoliation syndrome
* Psychoorganic syndrome
* Puer aeternus
* Pulmonary-renal syndrome
* Purple glove syndrome
* Purple urine bag syndrome

## Q

* Qazi–Markouizos syndrome
* Quadrilateral space syndrome
* Queen bee syndrome

## R

* Rabbit syndrome
* Rabson–Mendenhall syndrome
* Radial tunnel syndrome
* Rage syndrome
* Raghib syndrome
* Raine syndrome
* Ramos-Arroyo syndrome
* Ramsay Hunt syndrome type 1
* Ramsay Hunt syndrome type 2
* Ramsay Hunt syndrome
* RAPADILINO syndrome
* Rape trauma syndrome
* Rapp–Hodgkin syndrome
* Rapunzel syndrome
* Rasmussen syndrome
* RASopathy
* Raymond Céstan syndrome
* Raynaud syndrome
* Red ear syndrome
* Red man syndrome (Drug eruption)
* Refeeding syndrome
* Reactive arthritis
* Renal dysplasia-limb defects syndrome
* Renfield syndrome
* Renpenning's syndrome
* Restless legs syndrome
* Restrictive dermopathy
* Retinoic acid syndrome
* Retirement syndrome
* Rett syndrome
* Reversible cerebral vasoconstriction syndrome
* Revesz syndrome
* Reye syndrome
* Reynolds syndrome
* Reynolds' pentad
* Rh deficiency syndrome
* Riddoch syndrome
* Right middle lobe syndrome
* Riley-Day Syndrome
* Riley–Day syndrome
* Ring chromosome 14 syndrome
* Ring chromosome 20 syndrome
* Roberts syndrome
* Robinow syndrome
* Rochon-Duvigneaud's syndrome
* Roemheld syndrome
* ROHHAD
* Romano–Ward syndrome
* Rombo syndrome
* Rosenthal syndrome
* Rosenthal–Kloepfer syndrome
* Ross' syndrome
* Rosselli–Gulienetti syndrome
* Rothmund–Thomson syndrome
* Rotor syndrome
* Roussy–Lévy syndrome
* Rubinstein–Taybi syndrome
* Rud syndrome
* Rudiger syndrome
* Rumination syndrome
* Runting-stunting syndrome in broilers
* Ruzicka Goerz Anton syndrome

## S

* Saal Bulas syndrome
* Saal Greenstein syndrome
* Sabinas brittle hair syndrome
* Sack–Barabas syndrome
* SACRAL syndrome
* Saethre–Chotzen syndrome
* SAHA syndrome
* Sakati–Nyhan–Tisdale syndrome
* Salt water aspiration syndrome
* Sandifer syndrome
* Sanfilippo syndrome
* Sanjad-Sakati syndrome
* SAPHO syndrome
* Satoyoshi syndrome
* Savant syndrome
* Say syndrome
* Say–Meyer syndrome
* Scalp–ear–nipple syndrome
* SCARF syndrome
* Scheie syndrome
* Schimmelpenning syndrome
* Schinzel–Giedion syndrome
* Schmitt Gillenwater Kelly syndrome
* Schnitzler syndrome
* Schwartz–Jampel syndrome
* Schöpf–Schulz–Passarge syndrome
* Scimitar syndrome
* Scott syndrome
* Seaver Cassidy syndrome
* Seckel syndrome
* Second-impact syndrome
* Secretan's syndrome
* Seed dispersal syndrome
* Senior–Løken syndrome
* Sensenbrenner syndrome
* Septo-optic dysplasia
* Serkal syndrome
* Serotonin syndrome
* Serpentine fibula-polycystic kidney syndrome
* Sertoli cell-only syndrome
* Serum sickness–like reaction
* Setleis syndrome
* Severe acute respiratory syndrome
* Shaken baby syndrome
* Shapiro syndrome
* Sheehan's syndrome
* Shell nail syndrome
* Shone's syndrome
* Short anagen syndrome
* Short bowel syndrome
* Short man syndrome
* Short QT syndrome
* Short rib – polydactyly syndrome
* SHORT syndrome
* Shwachman–Diamond syndrome
* Shy-Drager syndrome
* Sick building syndrome
* Sick sinus syndrome
* Silver–Russell syndrome
* Simpson–Golabi–Behmel syndrome
* Singleton Merten syndrome
* Situs ambiguus
* Sjögren's syndrome
* Sjögren–Larsson syndrome
* Skeeter syndrome
* Skin fragility syndrome
* Sliding uncus syndrome
* Sly syndrome
* Small intestinal bacterial overgrowth
* Small Penis Syndrome
* Smith Martin Dodd syndrome
* Smith–Fineman–Myers syndrome
* Smith–Lemli–Opitz syndrome
* Smith–Magenis syndrome
* Snapping hip syndrome
* Snapping scapula syndrome
* Sneddon's syndrome
* Solipsism syndrome
* somatostatinoma syndrome
* Sopite syndrome
* Sotos syndrome
* Space adaptation syndrome
* Spastic ataxia-corneal dystrophy syndrome
* Spider lamb syndrome
* Splenic flexure syndrome
* Split hand syndrome
* Spondylo-ocular syndrome
* SPRED1
* Staphylococcal scalded skin syndrome
* STAR syndrome
* Stauffer syndrome
* Stendhal syndrome
* Steroid dementia syndrome
* Stevens–Johnson syndrome
* Stewart–Treves syndrome
* Stickler syndrome
* Sticky platelet syndrome
* Sticky skin syndrome
* Stiff person syndrome
* Stiff skin syndrome
* Stimmler syndrome
* Stockholm syndrome
* Straight back syndrome
* Stratton Parker syndrome
* Streff syndrome
* Strømme syndrome
* Stuck song syndrome
* Student syndrome
* Sturge–Weber syndrome
* Subclavian steal syndrome
* Sudden death syndrome
* Sudden infant death syndrome
* Sudden wealth syndrome
* Sugarman syndrome
* Sulfonamide hypersensitivity syndrome
* Summer penile syndrome
* Sundowning
* Superior mesenteric artery syndrome
* Superior orbital fissure syndrome
* Superior vena cava syndrome
* Supernumerary nipples–uropathies–Becker's nevus syndrome
* Supernumerary phantom limb
* Survivor syndrome
* Susac's syndrome
* Sweet's syndrome
* Swyer–James syndrome
* Syndrome of inappropriate antidiuretic hormone secretion
* Syndrome of subjective doubles
* Syndrome Without A Name
* HHH syndrome
* Systemic inflammatory response syndrome
* Sézary disease

## T

* TAFRO syndrome
* Talk and die syndrome
* TAN syndrome
* TAR syndrome
* Tardive dyskinesia
* Tardive psychosis
* Tarsal tunnel syndrome
* Taura syndrome
* Taussig–Bing syndrome
* Tea and toast syndrome
* TEMPI syndrome
* Temple–Baraitser syndrome
* Tension myositis syndrome
* Terson syndrome
* Testicular dysgenesis syndrome
* Tetra-amelia syndrome
* Tetralogy of Fallot
* Teunissen–Cremers syndrome
* Thevenard syndrome
* Thoracic insufficiency syndrome
* Thoracic outlet syndrome
* Thrombotic thrombocytopenic purpura
* Thymoma with immunodeficiency
* Tietz syndrome
* Tietze syndrome
* Timothy syndrome
* TNF receptor associated periodic syndrome
* Tolosa–Hunt syndrome
* Tonic tensor tympani syndrome
* Tooth and nail syndrome
* TORCH syndrome
* Tourette syndrome
* Townes–Brocks syndrome
* Toxic anterior segment syndrome
* Toxic oil syndrome
* Toxic shock syndrome
* Tracheobronchomegaly
* Transurethral resection of the prostate syndrome
* Transverse myelitis
* Treacher Collins syndrome
* Trench foot
* Tricho-hepato-enteric syndrome
* Trichothiodystrophy
* Tricho–dento–osseous syndrome
* Tricho–rhino–phalangeal syndrome
* Trigeminal trophic syndrome
* Triple X syndrome
* Triploid syndrome
* Trisomy 8
* Tropical splenomegaly syndrome
* Trotter's syndrome
* Truman Syndrome
* Tsukuhara syndrome
* Tumor lysis syndrome
* Tumor necrosis factor receptor associated periodic syndrome
* Turner syndrome
* Twiddler's syndrome
* Twin Anemia-Polycythemia Sequence
* Twin-to-twin transfusion syndrome

## U

* Ulysses syndrome
* Uncombable hair syndrome
* Uner Tan syndrome
* Upper airway resistance syndrome
* Upper motor neuron syndrome
* Upshaw–Schulman syndrome
* Urban survival syndrome
* Urban–Rogers–Meyer syndrome
* Urethral syndrome
* Urofacial syndrome
* Urticarial vasculitis
* Usher syndrome
* UV-sensitive syndrome

## V

* VACTERL association
* Valentino's syndrome
* Van der Woude syndrome
* van Gogh syndrome
* Van Wyk and Grumbach syndrome
* Vanishing bile duct syndrome
* Vascular access steal syndrome
* Vasoplegic syndrome
* Vestibulocerebellar syndrome
* Vici syndrome
* Villaret’s syndrome
* VIP syndrome
* VIPoma
* Visual looming syndrome
* Vitreous touch syndrome
* Vogt–Koyanagi–Harada disease
* Von Hippel–Lindau disease
* Vulvodynia

## W

* Waardenburg syndrome
* WAGR syndrome
* Walker–Warburg syndrome
* Wallis–Zieff–Goldblatt syndrome
* Waltman Walter syndrome
* Warkany syndrome 1
* Warmblood Fragile Foal Syndrome
* Wartenberg's Syndrome
* Waterhouse–Friderichsen syndrome
* Watson syndrome
* Weaver syndrome
* Weber's syndrome
* Weill–Marchesani syndrome
* Weismann-Netter–Stuhl syndrome
* Weissenbacher–Zweymüller syndrome
* Wellens' syndrome
* Wende–Bauckus syndrome
* Werner syndrome
* Wernicke–Korsakoff syndrome
* West syndrome
* Westerhof syndrome
* Wet lung syndrome in newborn
* WHIM syndrome
* White dog shaker syndrome
* White dot syndromes
* White spot syndrome
* White-nose syndrome
* Wiedemann-Steiner syndrome
* Wiedemann–Rautenstrauch syndrome
* Wildervanck syndrome
* Williams syndrome
* Williams–Campbell syndrome
* Wilson's temperature syndrome
* Wilson–Mikity syndrome
* Wilson–Turner syndrome
* Winchester syndrome
* Winter-over syndrome
* Wiskott–Aldrich syndrome
* Wissler's syndrome
* Withdrawal syndrome
* Withering abalone syndrome
* Wobbly hedgehog syndrome
* Wolcott–Rallison syndrome
* Wolff–Parkinson–White syndrome
* Wolfram syndrome
* Wolf–Hirschhorn syndrome
* Woodhouse–Sakati syndrome
* Work-related musculoskeletal disorders
* Worster-Drought syndrome
* Worth syndrome
* Wrinkly skin syndrome

## X

* X-linked lymphoproliferative disease
* Xeroderma pigmentosum
* Xia-Gibbs Syndrome
* XX male syndrome
* XXXY syndrome
* XXYY syndrome
* XY gonadal dysgenesis
* XYY syndrome

## Y

* Yellow nail syndrome
* Yemenite deaf-blind hypopigmentation syndrome
* Yentl syndrome
* Yim–Ebbin syndrome
* Young's syndrome
* Young–Madders syndrome
* Young–Simpson syndrome
* Yunis–Varon syndrome
* Yunnan sudden death syndrome

## Z

* Zadik–Barak–Levin syndrome
* Zamzam–Sheriff–Phillips syndrome
* Zechi-Ceide syndrome
* Zellweger syndrome
* Zieve's syndrome
* Zimmermann–Laband syndrome
* Zollinger–Ellison syndrome
* Zori–Stalker–Williams syndrome