- Cutaneous conditions
There are many conditions of or affecting the human integumentary system—the organ system that comprises the entire surface of the body and includes skin, hair, nails, and related muscle and glands.
In World War I, over two million days of service are estimated to have been lost by reason of skin diseases alone.
Approach to 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 term "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.
- 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 10mm in diameter at the widest point.
- Patch - A patch is a large macule equal to or greater than either 5 or 10mm, 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 either less than 5 or 10mm 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, but is greater than either 5 or 10mm in both width and depth, and most frequently centered in the dermis or subcutaneous fat. The depth of involvement is what differentiates a nodule from a papule.
- Vesicle - A vesicle is a circumscribed, fluid-containing, epidermal elevation generally considered less than either 5 or 10mm in diameter at the widest point.
- Bulla - A bulla is a large vesicle described as a rounded or irregularly shaped blister containing serous or seropurulent fluid, equal to or greater than either 5 or 10mm, depending on one's definition of a vesicle.
- Pustule - A pustule is a small elevation of the skin containing cloudy or purulent material 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.
- 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.
- Scale - dry or greasy laminated masses of keratin that represent thickened stratum corneum.
- Crust - dried serum, 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 not uncommonly 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.
"Configuration" refers to how lesions are locally grouped ("organized"), which contrasts with how they are distributed (see next section).
- Arciform or arcuate
- Reticular or reticulated
- Serpiginous or gyrate
"Distribution" refers to how lesions are localized. They may be confined to a single area (a patch) or may exist in several places. Several distributions correlate an anatomical reference. Some correlate with the means by which a given area becomes effected. 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 Shingles. Chicken Pox appears nearly everywhere on the body but Shingles 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.)
- Symmetric (one side mirrors the other)
- Flexural (Front of the fingers)
- Extensor (back of the fingers)
- Palmoplantar (palm of the hand, bottom of the foot)
- Periungual (under a finger or toe nail)
- Alopecia (hair loss)
- Photodistributed (places where sunlight reaches)
- Zosteriform or dermatomal (associated with a particular nerve)
Other related terms:
- Eczema (a type of dermatitis)
- Erythema (redness)
- Horn (a cell type)
Combined (conjoint) terms (maculopapular, papuloerosive, papulopustular, papulovesicular, papulosquamous, tuberoulcerative, vesiculobullous, vesiculopustular) are used to describe eruptions that evolve from one type of lesion to the next so often appear as having traits of both, when transitioning.
- Hydropic swelling
- ^ a b c d e Miller, Jeffrey H.; Marks, James G. (2006). Lookingbill and Marks' Principles of Dermatology. Saunders. ISBN 1-4160-3185-5.
- ^ Lane, CG. "Medical Progress, Military Dermatology." N Engl J Med. 1942;227:293-299.
- ^ a b c d e f g h i j k l m n Callen, Jeffrey (2000). Color atlas of dermatology. Philadelphia: W.B. Saunders. ISBN 0-7216-8256-1.
- ^ a b c d e f g h i j k l m n o James, William D.; et al. (2006). Andrews' Diseases of the Skin: Clinical Dermatology. Saunders Elsevier. ISBN 0-7216-2921-0.
- ^ a b Wolff, Klaus Dieter; et al. (2008). Fitzpatrick's Dermatology in General Medicine. McGraw-Hill Medical. ISBN 0-07-146690-8.
- ^ a b c d e f g h i 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. New York: McGraw-Hill Medical Pub. Division. ISBN 0-07-144019-4.
- ^ a b Cotran, Ramzi S.; Kumar, Vinay; Fausto, Nelson; Nelso Fausto; Robbins, Stanley L.; Abbas, Abul K. (2005). Robbins and Cotran pathologic basis of disease. St. Louis, Mo: Elsevier Saunders. ISBN 0-7216-0187-1.
Pathology: Medical conditions and ICD code (Disease / Disorder / Illness, Syndrome / Sequence, Symptom / Sign, Injury, etc.) (A/B, 001–139) (C/D,
279–289)Cancer (C00–D48, 140–239)
(E, 240–278) (F, 290–319) (G, 320–359) (H, 360–389) (I, 390–459) (J, 460–519) (K, 520–579) (L, 680–709) (M, 710–739) (N, 580–629) (O, 630–679) (P, 760–779) (Q, 740–759) (R, 780–799) (S/T, 800–999) Dermatitis and eczema (L20–L30, 690–693,698) Atopic dermatitisBesnier's prurigo Seborrheic dermatitisPityriasis simplex capillitii · Cradle cap Contact dermatitis
EczemaAutoimmune estrogen dermatitis · Autoimmune progesterone dermatitisBreast eczema · Ear eczema · Eyelid dermatitis · Hand eczema (Chronic vesiculobullous hand eczema, Hyperkeratotic hand dermatitis) Pruritus/Itch/
Prurigoby location: Pruritus ani · Pruritus scroti · Pruritus vulvae · Scalp pruritusDrug-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/ungrouped Disorders of skin appendages (L60–L75, 703–706) Nailbehavior: Onychotillomania · Onychophagiaother: Ingrown nail · Anonychiaungrouped: Paronychia (Acute paronychia, Chronic paronychia ) · Chevron nail · Congenital onychodysplasia of the index fingers · Green nails · Half and half nails · Hangnail · Hapalonychia · Hook 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 · Onychocryptosis · 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 Hairnoncicatricial alopecia: Alopecia/Alopecia areata (Alopecia totalis, Alopecia universalis, Ophiasis)
Androgenic alopecia (male-pattern baldness) · Hypotrichosis · Telogen effluvium · Traction alopecia · Lichen planopilaris · Trichorrhexis nodosa · Alopecia neoplastica · Anagen effluvium · Alopecia mucinosacicatricial 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 decalvansungrouped: Triangular alopecia · Frontal fibrosing alopecia · Marie Unna hereditary hypotrichosisHirsutism · Acquired generalized hypertrichosis · Generalized congenital hypertrichosis · Localized acquired hypertrichosis · Localized congenital hypertrichosis · Patterned acquired hypertrichosis · Prepubertal hypertrichosis · X-linked hypertrichosisAcneAcne 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 facieiPerioral 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)UngroupedGranulomatous facial dermatitis · Idiopathic facial aseptic granuloma · Periorbital dermatitis · SAPHO syndromeFollicular cystsUngroupedAcrokeratosis 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
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