Cutaneous condition - wikipedia Cutaneous condition `` Pustule '' redirects here. It is not to be confused with Boil. See also : List of cutaneous conditions Cutaneous condition Classification and external resources Specialty Dermatology ( edit on Wikidata ) A cutaneous condition is any medical condition that affects the integumentary system -- the organ system that encloses the body and includes skin, hair, nails, and related muscle and glands. The major function of this system is as a barrier against the external environment. Conditions of the human integumentary system constitute a broad spectrum of diseases, also known as dermatoses, as well as many nonpathologic states ( like, in certain circumstances, melanonychia and racquet nails ). While only a small number of skin diseases account for most visits to the physician, thousands of skin conditions have been described. Classification of these conditions often presents many nosological challenges, since underlying causes and pathogenetics are often not known. Therefore, most current textbooks present a classification based on location ( for example, conditions of the mucous membrane ), morphology ( chronic blistering conditions ), cause ( skin conditions resulting from physical factors ), and so on. Clinically, the diagnosis of any particular skin condition is made by gathering pertinent information regarding the presenting skin lesion ( s ), including the location ( such as arms, head, legs ), symptoms ( pruritus, pain ), duration ( acute or chronic ), arrangement ( solitary, generalized, annular, linear ), morphology ( macules, papules, vesicles ), and color ( red, blue, brown, black, white, yellow ). The diagnosis of many conditions often also requires a skin biopsy which yields histologic information that can be correlated with the clinical presentation and any laboratory data. The introduction of cutaneous ultrasound has allowed the detection of cutaneous tumors, inflammatory processes, nail disorders and hair diseases. Contents 1 Layer of skin involved 1.1 Epidermis 1.2 Dermis 1.3 Subcutaneous tissue 2 Diseases of the skin 3 History 4 Diagnoses 5 Lesions 5.1 Primary lesions 5.2 Secondary lesions 5.3 Configuration 5.4 Distribution 5.5 Other related terms 6 Histopathology 7 References Layer of skin involved Main article : Integumentary system The skin weighs an average of 4 kg ( 8.8 lb ), covers an area of 2 m ( 22 sq ft ), and is made of three distinct layers : the epidermis, dermis, and subcutaneous tissue. The two main types of human skin are glabrous skin, the nonhairy skin on the palms and soles ( also referred to as the `` palmoplantar '' surfaces ), and hair - bearing skin. Within the latter type, hairs in structures called pilosebaceous units have a hair follicle, sebaceous gland, and associated arrector pili muscle. In the embryo, the epidermis, hair, and glands are from the ectoderm, which is chemically influenced by the underlying mesoderm that forms the dermis and subcutaneous tissues. Epidermis Main article : Epidermis ( skin ) The epidermis is the most superficial layer of skin, a squamous epithelium with several strata : the stratum corneum, stratum lucidum, stratum granulosum, stratum spinosum, and stratum basale. Nourishment is provided to these layers via diffusion from the dermis, since the epidermis is without direct blood supply. The epidermis contains four cell types : keratinocytes, melanocytes, Langerhans cells, and Merkel cells. Of these, keratinocytes are the major component, constituting roughly 95 % of the epidermis. This stratified squamous epithelium is maintained by cell division within the stratum basale, in which differentiating cells slowly displace outwards through the stratum spinosum to the stratum corneum, where cells are continually shed from the surface. In normal skin, the rate of production equals the rate of loss ; about two weeks are needed for a cell to migrate from the basal cell layer to the top of the granular cell layer, and an additional two weeks to cross the stratum corneum. Dermis Main article : Dermis The dermis is the layer of skin between the epidermis and subcutaneous tissue, and comprises two sections, the papillary dermis and the reticular dermis. The superficial papillary dermis interdigitates with the overlying rete ridges of the epidermis, between which the two layers interact through the basement membrane zone. Structural components of the dermis are collagen, elastic fibers, and ground substance also called extra fibrillar matrix. Within these components are the pilosebaceous units, arrector pili muscles, and the eccrine and apocrine glands. The dermis contains two vascular networks that run parallel to the skin surface -- one superficial and one deep plexus -- which are connected by vertical communicating vessels. The function of blood vessels within the dermis is fourfold : to supply nutrition, to regulate temperature, to modulate inflammation, and to participate in wound healing. Subcutaneous tissue Main article : Subcutaneous tissue The subcutaneous tissue is a layer of fat between the dermis and underlying fascia. This tissue may be further divided into two components, the actual fatty layer, or panniculus adiposus, and a deeper vestigial layer of muscle, the panniculus carnosus. The main cellular component of this tissue is the adipocyte, or fat cell. The structure of this tissue is composed of septal ( i.e. linear strands ) and lobular compartments, which differ in microscopic appearance. Functionally, the subcutaneous fat insulates the body, absorbs trauma, and serves as a reserve energy source. Diseases of the skin For a comprehensive list, see List of cutaneous conditions. Skin diseases deaths per million persons in 2012 0 -- 2 3 -- 4 5 -- 8 9 -- 13 14 -- 17 18 -- 21 22 -- 27 28 -- 34 35 -- 47 48 -- 106 Diseases of the skin include skin infections and skin neoplasms ( including skin cancer ). History In 1572, Geronimo Mercuriali of Forlì, Italy, completed De morbis cutaneis ( translated `` On the diseases of the skin '' ). It is considered the first scientific work dedicated to dermatology. Diagnoses The physical examination of the skin and its appendages, as well as the mucous membranes, forms the cornerstone of an accurate diagnosis of cutaneous conditions. Most of these conditions present with cutaneous surface changes termed `` lesions, '' which have more or less distinct characteristics. Often proper examination will lead the physician to obtain appropriate historical information and / or laboratory tests that are able to confirm the diagnosis. Upon examination, the important clinical observations are the ( 1 ) morphology, ( 2 ) configuration, and ( 3 ) distribution of the lesion ( s ). With regard to morphology, the initial lesion that characterizes a condition is known as the `` primary lesion, '' and identification of such a lesions is the most important aspect of the cutaneous examination. Over time, these primary lesions may continue to develop or be modified by regression or trauma, producing `` secondary lesions. '' However, with that being stated, the lack of standardization of basic dermatologic terminology has been one of the principal barriers to successful communication among physicians in describing cutaneous findings. Nevertheless, there are some commonly accepted terms used to describe the macroscopic morphology, configuration, and distribution of skin lesions, which are listed below. Lesions Primary lesions Chigger bites on human skin showing characteristic welts Macule and patch Papule and plaque Nodules Vesicles and bulla Fissures, erosions and ulcers A pustule on the cheek Macule : A macule is a change in surface color, without elevation or depression and, therefore, nonpalpable, well or ill - defined, variously sized, but generally considered less than either 5 or 10 mm in diameter at the widest point. Patch : A patch is a large macule equal to or greater than either 5 or 10 mm across, depending on one 's definition of a macule. Patches may have some subtle surface change, such as a fine scale or wrinkling, but although the consistency of the surface is changed, the lesion itself is not palpable. Papule : A papule is a circumscribed, solid elevation of skin with no visible fluid, varying in size from a pinhead to less than either 5 or 10 mm in diameter at the widest point. Plaque : A plaque has been described as a broad papule, or confluence of papules equal to or greater than 1 cm, or alternatively as an elevated, plateau - like lesion that is greater in its diameter than in its depth. Nodule : A nodule is morphologically similar to a papule in that it is also a palpaple spherical lesion less than 1 cm in diameter. However, it is differentiated by being centered deeper in the dermis or subcutis. Tumour : Similar to a nodule but larger than 1 cm in diameter. Vesicle : A vesicle is small blister, a circumscribed, fluid - containing, epidermal elevation generally considered less than either 5 or 10 mm in diameter at the widest point. The fluid is clear serous fluid. Bulla : A bulla is a large blister, a rounded or irregularly shaped blister containing serous or seropurulent fluid, equal to or greater than either 5 or 10 mm, depending on one 's definition of a vesicle. Pustule : A pustule is a small elevation of the skin containing cloudy or purulent material ( pus ) usually consisting of necrotic inflammatory cells. These can be either white or red. Cyst : A cyst is an epithelial - lined cavity containing liquid, semi-solid, or solid material. Erosion : An erosion is a discontinuity of the skin exhibiting incomplete loss of the epidermis, a lesion that is moist, circumscribed, and usually depressed. Ulcer : An ulcer is a discontinuity of the skin exhibiting complete loss of the epidermis and often portions of the dermis and even subcutaneous fat. Fissure : A fissure is a crack in the skin that is usually narrow but deep. Wheal : A wheal is a rounded or flat - topped, pale red papule or plaque that is characteristically evanescent, disappearing within 24 to 48 hours. The temporary raised bubble of taut skin on the site of a properly - delivered intradermal injection is also called a welt, with the ID injection process itself frequently referred to as simply `` raising a wheal '' in medical texts. Telangiectasia : A telangiectasia represents an enlargement of superficial blood vessels to the point of being visible. Burrow : A burrow appears as a slightly elevated, grayish, tortuous line in the skin, and is caused by burrowing organisms. Secondary lesions Scale : dry or greasy laminated masses of keratin that represent thickened stratum corneum. Crust : dried sebum, pus, or blood usually mixed with epithelial and sometimes bacterial debris. Lichenification : epidermal thickening characterized by visible and palpable thickening of the skin with accentuated skin markings. Excoriation : a punctate or linear abrasion produced by mechanical means ( often scratching ), usually involving only the epidermis, but commonly reaching the papillary dermis. Induration : dermal thickening causing the cutaneous surface to feel thicker and firmer. Atrophy : refers to a loss of tissue, and can be epidermal, dermal, or subcutaneous. With epidermal atrophy, the skin appears thin, translucent, and wrinkled. Dermal or subcutaneous atrophy is represented by depression of the skin. Maceration : softening and turning white of the skin due to being consistently wet. Umbilication : formation of a depression at the top of a papule, vesicle, or pustule. Phyma : A tubercle on any external part of the body, such as in phymatous rosacea Configuration `` Configuration '' refers to how lesions are locally grouped ( `` organized '' ), which contrasts with how they are distributed ( see next section ). Agminate : in clusters Annular or circinate : ring - shaped Arciform or arcuate : arc - shaped Digitate : with finger - like projections Discoid or nummular : round or disc - shaped Figurate : with a particular shape Guttate : resembling drops Gyrate : coiled or spiral - shaped Herpetiform : resembling herpes Linear Mammillated : with rounded, breast - like projections Reticular or reticulated : resembling a net Serpiginous : with a wavy border Stellate : star - shaped Targetoid : resembling a bullseye Verrucous : wart - like Distribution `` Distribution '' refers to how lesions are localized. They may be confined to a single area ( a patch ) or may exist in several places. Some distributions correlate with the means by which a given area becomes affected. For example, contact dermatitis correlates with locations where allergen has elicited an allergic immune response. Varicella zoster virus is known to recur ( after its initial presentation as chicken pox ) as herpes zoster ( `` shingles '' ). Chicken pox appears nearly everywhere on the body, but herpes zoster tends to follow one or two dermatomes ; for example, the eruptions may appear along the bra line, on either or both sides of the patient. Generalized Symmetric : one side mirrors the other Flexural : on the front of the fingers Extensor : on the back of the fingers Intertriginous : in an area where two skin areas may touch or rub together Morbilliform : resembling measles Palmoplantar : on the palm of the hand or bottom of the foot Periorificial : around an orifice such as the mouth Periungual / subungual : around or under a fingernail or toenail Blaschkoid : following the path of Blaschko 's lines in the skin Photodistributed : in places where sunlight reaches Zosteriform or dermatomal : associated with a particular nerve Other related terms Collarette Comedo Confluent Eczema ( a type of dermatitis ) Evanescent ( lasting less than 24 hours ) Granuloma Livedo Purpura Erythema ( redness ) Horn ( a cell type ) Poikiloderma Histopathology Hyperkeratosis Parakeratosis Hypergranulosis Acanthosis Papillomatosis Dyskeratosis Acantholysis Spongiosis Hydropic swelling Exocytosis Vacuolization Erosion Ulceration Lentiginous References ^ Jump up to : Miller, Jeffrey H. ; Marks, James G. ( 2006 ). Lookingbill and Marks ' Principles of Dermatology. Saunders. ISBN 1 - 4160 - 3185 - 5. Jump up ^ Lippens, S ; Hoste, E ; Vandenabeele, P ; Agostinis, P ; Declercq, W ( April 2009 ). `` Cell death in the skin ''. Apoptosis. 14 ( 4 ) : 549 -- 69. doi : 10.1007 / s10495 - 009 - 0324 - z. PMID 19221876. Jump up ^ King, L.S. ( 1954 ). `` What Is Disease ? ''. Philosophy of Science. 21 ( 3 ) : 193 -- 203. doi : 10.1086 / 287343. Jump up ^ Bluefarb, Samuel M. ( 1984 ). Dermatology. Upjohn Co. ISBN 0 - 89501 - 004 - 6. ^ Jump up to : Lynch, Peter J. ( 1994 ). Dermatology. Williams & Wilkins. ISBN 0 - 683 - 05252 - 7. Jump up ^ Tilles G, Wallach D ( 1989 ). `` ( The history of nosology in dermatology ) ''. Ann Dermatol Venereol ( in French ). 116 ( 1 ) : 9 -- 26. PMID 2653160. Jump up ^ Lambert WC, Everett MA ( October 1981 ). `` The nosology of parapsoriasis ''. J. Am. Acad. Dermatol. 5 ( 4 ) : 373 -- 95. doi : 10.1016 / S0190 - 9622 ( 81 ) 70100 - 2. PMID 7026622. Jump up ^ Jackson R ( 1977 ). `` Historical outline of attempts to classify skin diseases ''. Can Med Assoc J. 116 ( 10 ) : 1165 -- 68. PMC 1879511. PMID 324589. Jump up ^ Copeman PW ( February 1995 ). `` The creation of global dermatology ''. JR Soc Med. 88 ( 2 ) : 78 -- 84. PMC 1295100. PMID 7769599. Jump up ^ Fitzpatrick, Thomas B. ; Klauss Wolff ; Wolff, Klaus Dieter ; Johnson, Richard R. ; Suurmond, Dick ; Richard Suurmond ( 2005 ). Fitzpatrick 's color atlas and synopsis of clinical dermatology. McGraw - Hill Medical Pub. Division. ISBN 0 - 07 - 144019 - 4. Jump up ^ Werner B ( August 2009 ). `` ( Skin biopsy and its histopathologic analysis : Why ? What for ? How ? Part I ) ''. An Bras Dermatol ( in Portuguese ). 84 ( 4 ) : 391 -- 95. PMID 19851671. Jump up ^ Werner B ( October 2009 ). `` ( Skin biopsy with histopathologic analysis : why ? what for ? how ? part II ) ''. An Bras Dermatol ( in Portuguese ). 84 ( 5 ) : 507 -- 13. doi : 10.1590 / S0365 - 05962009000500010. PMID 20098854. Jump up ^ Xiaowei Xu ; Elder, David A. ; Rosalie Elenitsas ; Johnson, Bernett L. ; Murphy, George E. ( 2008 ). Lever 's Histopathology of the Skin. Hagerstwon, MD : Lippincott Williams & Wilkins. ISBN 0 - 7817 - 7363 - 6. Jump up ^ Weedon 's Skin Pathology, 2 - Volume Set : Expert Consult -- Online and Print. Edinburgh : Churchill Livingstone. 2009. ISBN 0 - 7020 - 3941 - 1. Jump up ^ Fernando Alfageme, Cerezo E, Roustan G. `` Real - Time Elastography in Inflammatory Skin Diseases : A Primer Ultrasound '' in Medicine & Biology, Volume 41, Issue 4, Supplement, April 2015, pp. S82 -- S83 ^ Jump up to : Burns, Tony ; et al. ( 2006 ) Rook 's Textbook of Dermatology CD - ROM. Wiley - Blackwell. ISBN 1 - 4051 - 3130 - 6. Jump up ^ Paus R, Cotsarelis G ( 1999 ). `` The biology of hair follicles ''. N Engl J Med. 341 ( 7 ) : 491 -- 97. doi : 10.1056 / NEJM199908123410706. PMID 10441606. Jump up ^ Goldsmith, Lowell A. ( 1983 ). Biochemistry and physiology of the skin. Oxford University Press. ISBN 0 - 19 - 261253 - 0. Jump up ^ Fuchs E ( February 2007 ). `` Scratching the surface of skin development ''. Nature. 445 ( 7130 ) : 834 -- 42. doi : 10.1038 / nature05659. PMC 2405926. PMID 17314969. Jump up ^ Fuchs E, Horsley V ( April 2008 ). `` More than one way to skin ''. Genes Dev. 22 ( 8 ) : 976 -- 85. doi : 10.1101 / gad. 1645908. PMC 2732395. PMID 18413712. ^ Jump up to : Wolff, Klaus Dieter ; et al. ( 2008 ). Fitzpatrick 's Dermatology in General Medicine. McGraw - Hill Medical. ISBN 0 - 07 - 146690 - 8. Jump up ^ `` Skin Anatomy ''. Medscape. Retrieved 3 June 2013. Jump up ^ Bolognia, Jean L. ; et al. ( 2007 ). Dermatology. St. Louis : Mosby. ISBN 1 - 4160 - 2999 - 0. ^ Jump up to : Rapini, Ronald P. ( 2005 ). Practical dermatopathology. Elsevier Mosby. ISBN 0 - 323 - 01198 - 5. Jump up ^ Grant - Kels, JM ( 2007 ). Color Atlas of Dermatopathology ( Dermatology : Clinical & Basic Science ). Informa Healthcare. p. 163. ISBN 0 - 8493 - 3794 - 1. Jump up ^ Ryan, T ( 1991 ). `` Cutaneous Circulation ''. In Goldsmith, Lowell A. Physiology, biochemistry, and molecular biology of the skin ( 2nd ed. ). New York : Oxford University Press. p. 1019. ISBN 0 - 19 - 505612 - 4. Jump up ^ Swerlick, RA ; Lawley, TJ ( January 1993 ). `` Role of microvascular endothelial cells in inflammation ''. J. Invest. Dermatol. 100 ( 1 ) : 111S -- 115S. doi : 10.1038 / jid. 1993.33. PMID 8423379. Jump up ^ `` ecognizing Neoplastic Skin Lesions : A Photo Guide ''. American Family Physician. Retrieved 3 June 2013. ^ Jump up to : Callen, Jeffrey ( 2000 ). Color atlas of dermatology. Philadelphia : W.B. Saunders. ISBN 0 - 7216 - 8256 - 1. ^ Jump up to : James, William D. ; et al. ( 2006 ). Andrews ' Diseases of the Skin : Clinical Dermatology. Saunders Elsevier. ISBN 0 - 7216 - 2921 - 0. ^ Jump up to : Fitzpatrick, Thomas B. ; Klauss Wolff ; Wolff, Klaus Dieter ; Johnson, Richard R. ; Suurmond, Dick ; Richard Suurmond ( 2005 ). 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Dermatitis and eczema ( L20 -- L30, 690 -- 693,698 ) Atopic dermatitis Besnier 's prurigo Seborrheic dermatitis Pityriasis simplex capillitii Cradle cap Contact dermatitis ( allergic, irritant ) plants : Urushiol - induced contact dermatitis African blackwood dermatitis Tulip fingers other : Abietic acid dermatitis Diaper rash Airbag dermatitis Baboon syndrome Contact stomatitis Protein contact dermatitis Eczema Autoimmune estrogen dermatitis Autoimmune progesterone dermatitis Breast eczema Ear eczema Eyelid dermatitis Topical steroid addiction Hand eczema Chronic vesiculobullous hand eczema Hyperkeratotic hand dermatitis Autosensitization dermatitis / Id reaction Candidid Dermatophytid Molluscum dermatitis Circumostomy eczema Dyshidrosis Juvenile plantar dermatosis Nummular eczema Nutritional deficiency eczema Sulzberger -- Garbe syndrome Xerotic eczema Pruritus / Itch / Prurigo Lichen simplex chronicus / Prurigo nodularis by location : Pruritus ani Pruritus scroti Pruritus vulvae Scalp pruritus Drug - induced pruritus Hydroxyethyl starch - induced pruritus Senile pruritus Aquagenic pruritus Aquadynia Adult blaschkitis due to liver disease Biliary pruritus Cholestatic pruritus Prion pruritus Prurigo pigmentosa Prurigo simplex Puncta pruritica Uremic pruritus Other substances taken internally : Bromoderma Fixed drug reaction Nummular dermatitis Pityriasis alba Papuloerythroderma of Ofuji Disorders of skin appendages ( L60 -- L75, 703 -- 706 ) Nail thickness : Onychogryphosis Onychauxis color : Beau 's lines Yellow nail syndrome Leukonychia Azure lunula shape : Koilonychia Nail clubbing behavior : Onychotillomania Onychophagia other : Ingrown nail Anonychia ungrouped : Paronychia Acute Chronic Chevron nail Congenital onychodysplasia of the index fingers Green nails Half and half nails Hangnail Hapalonychia Hook nail Ingrown nail Lichen planus of the nails Longitudinal erythronychia Malalignment of the nail plate Median nail dystrophy Mees ' lines Melanonychia Muehrcke 's lines Nail -- patella syndrome Onychoatrophy Onycholysis Onychomadesis Onychomatricoma Onychomycosis Onychophosis Onychoptosis defluvium Onychorrhexis Onychoschizia Platonychia Pincer nails Plummer 's nail Psoriatic nails Pterygium inversum unguis Pterygium unguis Purpura of the nail bed Racquet nail Red lunulae Shell nail syndrome Splinter hemorrhage Spotted lunulae Staining of the nail plate Stippled nails Subungual hematoma Terry 's nails Twenty - nail dystrophy Hair Hair loss / Baldness noncicatricial alopecia : Alopecia areata totalis universalis Ophiasis Androgenic alopecia ( male - pattern baldness ) Hypotrichosis Telogen effluvium Traction alopecia Lichen planopilaris Trichorrhexis nodosa Alopecia neoplastica Anagen effluvium Alopecia mucinosa cicatricial alopecia : Pseudopelade of Brocq Central centrifugal cicatricial alopecia Pressure alopecia Traumatic alopecia Tumor alopecia Hot comb alopecia Perifolliculitis capitis abscedens et suffodiens Graham - Little syndrome Folliculitis decalvans ungrouped : Triangular alopecia Frontal fibrosing alopecia Marie Unna hereditary hypotrichosis Hypertrichosis Hirsutism Acquired localised generalised patterned Congenital generalised localised X-linked Prepubertal Acneiform eruption Acne Acne vulgaris Acne conglobata Acne miliaris necrotica Tropical acne Infantile acne / Neonatal acne Excoriated acne Acne fulminans Acne medicamentosa ( e.g., steroid acne ) Halogen acne Iododerma Bromoderma Chloracne Oil acne Tar acne Acne cosmetica Occupational acne Acne aestivalis Acne keloidalis nuchae Acne mechanica Acne with facial edema Pomade acne Acne necrotica Blackhead Lupus miliaris disseminatus faciei Rosacea Perioral dermatitis Granulomatous perioral dermatitis Phymatous rosacea Rhinophyma Blepharophyma Gnathophyma Metophyma Otophyma Papulopustular rosacea Lupoid rosacea Erythrotelangiectatic rosacea Glandular rosacea Gram - negative rosacea Steroid rosacea Ocular rosacea Persistent edema of rosacea Rosacea conglobata variants Periorificial dermatitis Pyoderma faciale Ungrouped Granulomatous facial dermatitis Idiopathic facial aseptic granuloma Periorbital dermatitis SAPHO syndrome Follicular cysts `` Sebaceous cyst '' Epidermoid cyst Trichilemmal cyst Steatocystoma simplex multiplex Milia Inflammation Folliculitis Folliculitis nares perforans Tufted folliculitis Pseudofolliculitis barbae Hidradenitis Hidradenitis suppurativa Recurrent palmoplantar hidradenitis Neutrophilic eccrine hidradenitis Ungrouped Acrokeratosis paraneoplastica of Bazex Acroosteolysis Bubble hair deformity Disseminate and recurrent infundibulofolliculitis Erosive pustular dermatitis of the scalp Erythromelanosis follicularis faciei et colli Hair casts Hair follicle nevus Intermittent hair -- follicle dystrophy Keratosis pilaris atropicans Kinking hair Koenen 's tumor Lichen planopilaris Lichen spinulosus Loose anagen syndrome Menkes kinky hair syndrome Monilethrix Parakeratosis pustulosa Pili ( Pili annulati Pili bifurcati Pili multigemini Pili pseudoannulati Pili torti ) Pityriasis amiantacea Plica neuropathica Poliosis Rubinstein -- Taybi syndrome Setleis syndrome Traumatic anserine folliculosis Trichomegaly Trichomycosis axillaris Trichorrhexis ( Trichorrhexis invaginata Trichorrhexis nodosa ) Trichostasis spinulosa Uncombable hair syndrome Wooly hair Wooly hair nevus Sweat glands Eccrine Miliaria Colloid milium Miliaria crystalline Miliaria profunda Miliaria pustulosa Miliaria rubra Occlusion miliaria Postmiliarial hypohidrosis Granulosis rubra nasi Ross ' syndrome Anhidrosis Hyperhidrosis Generalized Gustatory Palmoplantar Apocrine Body odor Chromhidrosis Fox -- Fordyce disease Sebaceous Sebaceous hyperplasia Diseases of the skin and appendages by morphology Growths Epidermal wart callus seborrheic keratosis acrochordon molluscum contagiosum actinic keratosis squamous - cell carcinoma basal - cell carcinoma Merkel - cell carcinoma nevus sebaceous trichoepithelioma Pigmented Freckles lentigo melasma nevus melanoma Dermal and subcutaneous epidermal inclusion cyst hemangioma dermatofibroma ( benign fibrous histiocytoma ) keloid lipoma neurofibroma xanthoma Kaposi 's sarcoma infantile digital fibromatosis granular cell tumor leiomyoma lymphangioma circumscriptum myxoid cyst Rashes With epidermal involvement Eczematous contact dermatitis atopic dermatitis seborrheic dermatitis stasis dermatitis lichen simplex chronicus Darier 's disease glucagonoma syndrome langerhans cell histiocytosis lichen sclerosus pemphigus foliaceus Wiskott -- Aldrich syndrome Zinc deficiency Scaling psoriasis tinea ( corporis cruris pedis manuum faciei ) pityriasis rosea secondary syphilis mycosis fungoides systemic lupus erythematosus pityriasis rubra pilaris parapsoriasis ichthyosis Blistering herpes simplex herpes zoster varicella bullous impetigo acute contact dermatitis pemphigus vulgaris bullous pemphigoid dermatitis herpetiformis porphyria cutanea tarda epidermolysis bullosa simplex Papular scabies insect bite reactions lichen planus miliaria keratosis pilaris lichen spinulosus transient acantholytic dermatosis lichen nitidus pityriasis lichenoides et varioliformis acuta Pustular acne vulgaris acne rosacea folliculitis impetigo candidiasis gonococcemia dermatophyte coccidioidomycosis subcorneal pustular dermatosis Hypopigmented tinea versicolor vitiligo pityriasis alba postinflammatory hyperpigmentation tuberous sclerosis idiopathic guttate hypomelanosis leprosy hypopigmented mycosis fungoides Without epidermal involvement Red Blanchable Erythema Generalized drug eruptions viral exanthems toxic erythema systemic lupus erythematosus Localized cellulitis abscess boil erythema nodosum carcinoid syndrome fixed drug eruption Specialized urticaria erythema ( multiforme migrans gyratum repens annulare centrifugum ab igne ) Nonblanchable Purpura Macular thrombocytopenic purpura actinic / solar purpura Papular disseminated intravascular coagulation vasculitis Indurated scleroderma / morphea granuloma annulare lichen sclerosis et atrophicus necrobiosis lipoidica Miscellaneous disorders Ulcers Hair telogen effluvium androgenic alopecia alopecia areata systemic lupus erythematosus tinea capitis loose anagen syndrome lichen planopilaris folliculitis decalvans acne keloidalis nuchae Nail onychomycosis psoriasis paronychia ingrown nail Mucous membrane Aphthous stomatitis oral candidiasis lichen planus leukoplakia pemphigus vulgaris mucous membrane pemphigoid cicatricial pemphigoid herpesvirus coxsackievirus syphilis systemic histoplasmosis squamous - cell carcinoma Retrieved from `` https://en.wikipedia.org/w/index.php?title=Cutaneous_condition&oldid=808661086 '' Categories : Cutaneous conditions Hidden categories : CS1 French - language sources ( fr ) CS1 Portuguese - language sources ( pt ) Talk Contents About Wikipedia বাংলা Català Deutsch Español Euskara فارسی Français 한국어 हिन्दी Ido Italiano עברית Кыргызча മലയാളം ਪੰਜਾਬੀ Português Русский தமிழ் Тоҷикӣ Türkçe Українська Tiếng Việt 中文 Edit links This page was last edited on 4 November 2017, at 08 : 59. 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Question: skin loss that is confined to epidermal tissue is called a
Answer: Erosion