Patient description: The patient is a 16-year-old girl recently diagnosed with myasthenia gravis, class IIa. She complains of diplopia and weakness affecting in her upper extremities. She had a positive anti-AChR antibody test, and her single fiber electromyography (SFEMG) was positive. She is on acetylcholinesterase inhibitor treatment combined with immunosuppressants. But she still has some symptoms. She does not smoke or use illicit drugs. She is not sexually active, and her menses are regular. Her physical exam and lab studies are not remarkable for any other abnormalities. BP: 110/75 Hgb: 11 g/dl WBC: 8000 /mm3 Plt: 300000 /ml Creatinine: 0.5 mg/dl BUN: 10 mg/dl Beta hcg: negative for pregnancy

Clinical trial eligibility criteria: eligible ages (years): 0.0-999.0,  Rare Disorders Undiagnosed Disorders Disorders of Unknown Prevalence Cornelia De Lange Syndrome Prenatal Benign Hypophosphatasia Perinatal Lethal Hypophosphatasia Odontohypophosphatasia Adult Hypophosphatasia Childhood-onset Hypophosphatasia Infantile Hypophosphatasia Hypophosphatasia Kabuki Syndrome Bohring-Opitz Syndrome Narcolepsy Without Cataplexy Narcolepsy-cataplexy Hypersomnolence Disorder Idiopathic Hypersomnia Without Long Sleep Time Idiopathic Hypersomnia With Long Sleep Time Idiopathic Hypersomnia Kleine-Levin Syndrome Kawasaki Disease Leiomyosarcoma Leiomyosarcoma of the Corpus Uteri Leiomyosarcoma of the Cervix Uteri Leiomyosarcoma of Small Intestine Acquired Myasthenia Gravis Addison Disease Hyperacusis (Hyperacousis) Juvenile Myasthenia Gravis Transient Neonatal Myasthenia Gravis Williams Syndrome Lyme Disease Myasthenia Gravis Marinesco Sjogren Syndrome(Marinesco-Sjogren Syndrome) Isolated Klippel-Feil Syndrome Frasier Syndrome Denys-Drash Syndrome Beckwith-Wiedemann Syndrome Emanuel Syndrome Isolated Aniridia Axenfeld-Rieger Syndrome Aniridia-intellectual Disability Syndrome Aniridia - Renal Agenesis - Psychomotor Retardation Aniridia - Ptosis - Intellectual Disability - Familial Obesity Aniridia - Cerebellar Ataxia - Intellectual Disability Aniridia - Absent Patella Aniridia Peters Anomaly - Cataract Peters Anomaly Potocki-Shaffer Syndrome Silver-Russell Syndrome Due to Maternal Uniparental Disomy of Chromosome 11 Silver-Russell Syndrome Due to Imprinting Defect of 11p15 Silver-Russell Syndrome Due to 11p15 Microduplication Syndromic Aniridia WAGR Syndrome Wolf-Hirschhorn Syndrome 4p16.3 Microduplication Syndrome 4p Deletion Syndrome, Non-Wolf-Hirschhorn Syndrome Autosomal Recessive Stickler Syndrome Stickler Syndrome Type 2 Stickler Syndrome Type 1 Stickler Syndrome Mucolipidosis Type 4 X-linked Spinocerebellar Ataxia Type 4 X-linked Spinocerebellar Ataxia Type 3 X-linked Intellectual Disability - Ataxia - Apraxia X-linked Progressive Cerebellar Ataxia X-linked Non Progressive Cerebellar Ataxia X-linked Cerebellar Ataxia Vitamin B12 Deficiency Ataxia Toxic Exposure Ataxia Unclassified Autosomal Dominant Spinocerebellar Ataxia Thyroid Antibody Ataxia Sporadic Adult-onset Ataxia of Unknown Etiology Spinocerebellar Ataxia With Oculomotor Anomaly Spinocerebellar Ataxia With Epilepsy Spinocerebellar Ataxia With Axonal Neuropathy Type 2 Spinocerebellar Ataxia Type 8 Spinocerebellar Ataxia Type 7 Spinocerebellar Ataxia Type 6 Spinocerebellar Ataxia Type 5 Spinocerebellar Ataxia Type 4 Spinocerebellar Ataxia Type 37 Spinocerebellar Ataxia Type 36 Spinocerebellar Ataxia Type 35 Spinocerebellar Ataxia Type 34 Spinocerebellar Ataxia Type 32 Spinocerebellar Ataxia Type 31 Spinocerebellar Ataxia Type 30 Spinocerebellar Ataxia Type 3 Spinocerebellar Ataxia Type 29 Spinocerebellar Ataxia Type 28 Spinocerebellar Ataxia Type 27 Spinocerebellar Ataxia Type 26 Spinocerebellar Ataxia Type 25 Spinocerebellar Ataxia Type 23 Spinocerebellar Ataxia Type 22 Spinocerebellar Ataxia Type 21 Spinocerebellar Ataxia Type 20 Spinocerebellar Ataxia Type 2 Spinocerebellar Ataxia Type 19/22 Spinocerebellar Ataxia Type 18 Spinocerebellar Ataxia Type 17 Spinocerebellar Ataxia Type 16 Spinocerebellar Ataxia Type 15/16 Spinocerebellar Ataxia Type 14 Spinocerebellar Ataxia Type 13 Spinocerebellar Ataxia Type 12 Spinocerebellar Ataxia Type 11 Spinocerebellar Ataxia Type 10 Spinocerebellar Ataxia Type 1 With Axonal Neuropathy Spinocerebellar Ataxia Type 1 Spinocerebellar Ataxia - Unknown Spinocerebellar Ataxia - Dysmorphism Non Progressive Epilepsy and/or Ataxia With Myoclonus as a Major Feature Spasticity-ataxia-gait Anomalies Syndrome Spastic Ataxia With Congenital Miosis Spastic Ataxia - Corneal Dystrophy Spastic Ataxia Rare Hereditary Ataxia Rare Ataxia Recessive Mitochondrial Ataxia Syndrome Progressive Epilepsy and/or Ataxia With Myoclonus as a Major Feature Posterior Column Ataxia - Retinitis Pigmentosa Post-Stroke Ataxia Post-Head Injury Ataxia Post Vaccination Ataxia Polyneuropathy - Hearing Loss - Ataxia - Retinitis Pigmentosa - Cataract Muscular Atrophy - Ataxia - Retinitis Pigmentosa - Diabetes Mellitus Non-hereditary Degenerative Ataxia Paroxysmal Dystonic Choreathetosis With Episodic Ataxia and Spasticity Olivopontocerebellar Atrophy - Deafness NARP Syndrome Myoclonus - Cerebellar Ataxia - Deafness Multiple System Atrophy, Parkinsonian Type Multiple System Atrophy, Cerebellar Type Multiple System Atrophy Maternally-inherited Leigh Syndrome Machado-Joseph Disease Type 3 Machado-Joseph Disease Type 2 Machado-Joseph Disease Type 1 Leigh Syndrome Late-onset Ataxia With Dementia Infection or Post Infection Ataxia GAD Ataxia Hereditary Episodic Ataxia Gliadin/Gluten Ataxia Friedreich Ataxia Fragile X-associated Tremor/Ataxia Syndrome Familial Paroxysmal Ataxia Exposure to Medications Ataxia Episodic Ataxia With Slurred Speech Episodic Ataxia Unknown Type Episodic Ataxia Type 7 Episodic Ataxia Type 6 Episodic Ataxia Type 5 Episodic Ataxia Type 4 Episodic Ataxia Type 3 Episodic Ataxia Type 1 Epilepsy and/or Ataxia With Myoclonus as Major Feature Early-onset Spastic Ataxia-neuropathy Syndrome Early-onset Progressive Neurodegeneration - Blindness - Ataxia - Spasticity Early-onset Cerebellar Ataxia With Retained Tendon Reflexes Early-onset Ataxia With Dementia Childhood-onset Autosomal Recessive Slowly Progressive Spinocerebellar Ataxia Dilated Cardiomyopathy With Ataxia Cataract - Ataxia - Deafness Cerebellar Ataxia, Cayman Type Cerebellar Ataxia With Peripheral Neuropathy Cerebellar Ataxia - Hypogonadism Cerebellar Ataxia - Ectodermal Dysplasia Cerebellar Ataxia - Areflexia - Pes Cavus - Optic Atrophy - Sensorineural Hearing Loss Brain Tumor Ataxia Brachydactyly - Nystagmus - Cerebellar Ataxia Benign Paroxysmal Tonic Upgaze of Childhood With Ataxia Autosomal Recessive Syndromic Cerebellar Ataxia Autosomal Recessive Spastic Ataxia With Leukoencephalopathy Autosomal Recessive Spastic Ataxia of Charlevoix-Saguenay Autosomal Recessive Spastic Ataxia - Optic Atrophy - Dysarthria Autosomal Recessive Spastic Ataxia Autosomal Recessive Metabolic Cerebellar Ataxia Autosomal Dominant Spinocerebellar Ataxia Due to Repeat Expansions That do Not Encode Polyglutamine Autosomal Recessive Ataxia, Beauce Type Autosomal Recessive Ataxia Due to Ubiquinone Deficiency Autosomal Recessive Ataxia Due to PEX10 Deficiency Autosomal Recessive Degenerative and Progressive Cerebellar Ataxia Autosomal Recessive Congenital Cerebellar Ataxia Due to MGLUR1 Deficiency Autosomal Recessive Congenital Cerebellar Ataxia Due to GRID2 Deficiency Autosomal Recessive Congenital Cerebellar Ataxia Autosomal Recessive Cerebellar Ataxia-pyramidal Signs-nystagmus-oculomotor Apraxia Syndrome Autosomal Recessive Cerebellar Ataxia-epilepsy-intellectual Disability Syndrome Due to WWOX Deficiency Autosomal Recessive Cerebellar Ataxia-epilepsy-intellectual Disability Syndrome Due to TUD Deficiency Autosomal Recessive Cerebellar Ataxia-epilepsy-intellectual Disability Syndrome Due to KIAA0226 Deficiency Autosomal Recessive Cerebellar Ataxia-epilepsy-intellectual Disability Syndrome Autosomal Recessive Cerebellar Ataxia With Late-onset Spasticity Autosomal Recessive Cerebellar Ataxia Due to STUB1 Deficiency Autosomal Recessive Cerebellar Ataxia Due to a DNA Repair Defect Autosomal Recessive Cerebellar Ataxia - Saccadic Intrusion Autosomal Recessive Cerebellar Ataxia - Psychomotor Retardation Autosomal Recessive Cerebellar Ataxia - Blindness - Deafness Autosomal Recessive Cerebellar Ataxia Autosomal Dominant Spinocerebellar Ataxia Due to a Polyglutamine Anomaly Autosomal Dominant Spinocerebellar Ataxia Due to a Point Mutation Autosomal Dominant Spinocerebellar Ataxia Due to a Channelopathy Autosomal Dominant Spastic Ataxia Type 1 Autosomal Dominant Spastic Ataxia Autosomal Dominant Optic Atrophy Ataxia-telangiectasia Variant Ataxia-telangiectasia Autosomal Dominant Cerebellar Ataxia, Deafness and Narcolepsy Autosomal Dominant Cerebellar Ataxia Type 4 Autosomal Dominant Cerebellar Ataxia Type 3 Autosomal Dominant Cerebellar Ataxia Type 2 Autosomal Dominant Cerebellar Ataxia Type 1 Autosomal Dominant Cerebellar Ataxia Ataxia-telangiectasia-like Disorder Ataxia With Vitamin E Deficiency Ataxia With Dementia Ataxia - Oculomotor Apraxia Type 1 Ataxia - Other Ataxia - Genetic Diagnosis - Unknown Acquired Ataxia Adult-onset Autosomal Recessive Cerebellar Ataxia Alcohol Related Ataxia Multiple Endocrine Neoplasia Multiple Endocrine Neoplasia Type II Multiple Endocrine Neoplasia Type 1 Multiple Endocrine Neoplasia Type 2 Multiple Endocrine Neoplasia, Type IV Multiple Endocrine Neoplasia, Type 3 Multiple Endocrine Neoplasia (MEN) Syndrome Multiple Endocrine Neoplasia Type 2B Multiple Endocrine Neoplasia Type 2A Atypical Hemolytic Uremic Syndrome Atypical HUS Wiedemann-Steiner Syndrome Breast Implant-Associated Anaplastic Large Cell Lymphoma Autoimmune/Inflammatory Syndrome Induced by Adjuvants (ASIA) Hemophagocytic Lymphohistiocytosis Behcet's Disease Alagille Syndrome Inclusion Body Myopathy With Early-onset Paget Disease and Frontotemporal Dementia (IBMPFD) Lowe Syndrome Pitt Hopkins Syndrome 1p36 Deletion Syndrome Jansen Type Metaphyseal Chondrodysplasia Cockayne Syndrome Chronic Recurrent Multifocal Osteomyelitis CRMO Malan Syndrome Hereditary Sensory and Autonomic Neuropathy Type Ie VCP Disease Hypnic Jerking Sleep Myoclonus Mollaret Meningitis Recurrent Viral Meningitis CRB1 Leber Congenital Amaurosis Retinitis Pigmentosa Rare Retinal Disorder KCNMA1-Channelopathy Primary Biliary Cirrhosis ZMYND11 Transient Global Amnesia Glycogen Storage Disease Alstrom Syndrome White Sutton Syndrome DNM1 EIEE31 Myhre Syndrome Recurrent Respiratory Papillomatosis Laryngeal Papillomatosis Tracheal Papillomatosis Refsum Disease Nicolaides Baraitser Syndrome Leukodystrophy Tango2 Cauda Equina Syndrome Rare Gastrointestinal Disorders Achalasia-Addisonian Syndrome Achalasia Cardia Achalasia Icrocephaly Syndrome Anal Fistula Congenital Sucrase-Isomaltase Deficiency Eosinophilic Gastroenteritis Idiopathic Gastroparesis Hirschsprung Disease Rare Inflammatory Bowel Disease Intestinal Pseudo-Obstruction Scleroderma Short Bowel Syndrome Sacral Agenesis Sacral Agenesis Syndrome Caudal Regression Scheuermann Disease SMC1A Loss of Function Epilepsy Diagnosis of a rare disease, a disease of unknown prevalence, undiagnosed or an unaffected carrier of a rare/uncommon disease  Diagnosis of a disease which is not rare