Dermatology – Lesion Descriptions – Flashcards
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Characteristics of Lesions
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size (measure all dimensions) shape color texture elevation or depression attachment at base: pedunculated (having a stalk) or sessile (without a stalk) Exudates (color, odor, amount, consistency) Configuration (annular (rings), grouped, linear, arciform (bow-shaped), diffuse) Location and distribution: generalized or localized, region of body, patterns, discrete or confluent
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Characteristics of Lesions - Distribution - Localized
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lesion appears in one small area Examples: Impetigo, herpes simples (eg labias), tinea corporis (ringworm)
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Characteristics of Lesions - Distribution - Regional
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lesions involve a specific region of body Examples: acne vulgaris (pilosebaceous gland distribution), herpes zoster (nerve dermatomal distribution), psoriasis (flexural surfaces and skin folds)
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Characteristics of Lesions - Distribution - Generalized
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lesions appear widely distributed or in numerous areas simultaneously Examples: urticarial, disseminated drug eruption
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Characteristics of Lesions - Shape/Arrangement - Round/Discoid
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coin-shaped (no central clearing) Example: nummular eczema
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Characteristics of Lesions - Shape/Arrangement - Oval
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Ovoid shape Example: pityriasis rosea
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Characteristics of Lesions - Shape/Arrangement - Annular
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round, active margins with central clearing Examples: tinea corporis, sarcoidosis
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Characteristics of Lesions - Shape/Arrangement - Zosteriform (dermatomal)
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Following a nerve or segment of the body Examples: Herpes zoster
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Characteristics of Lesions - Shape/Arrangement - Polycyclic
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Interlocking or coalesced circles (formed by enlargement of annular lesions) Examples: Psoriases, urticaria
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Characteristics of Lesions - Shape/Arrangement - Linear
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in a line Examples: contact dermatitis
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Characteristics of Lesions - Shape/Arrangement - Iris/target lesions
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pink macules with purple central papules Examples: erythema multiform
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Characteristics of Lesions - Shape/Arrangement - Stellate
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star shaped Examples: Meningococcal septicemia
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Characteristics of Lesions - Shape/Arrangement - Serpiginous
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snakelike or wavy line track Examples: cutanea larva migrans
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Characteristics of Lesions - Shape/Arrangement - Reticulate
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Netlike or lacey Examples: Polyarteritis nodosa, lichen planus lesions of erythema infectiosum
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Characteristics of Lesions - Shape/Arrangement - Morbilliform
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measles-like; maculopapular lesions that become confluent on the face and body Examples: measles, roseola, drug eruptions
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Characteristics of Lesions - Border/Margin - Discrete
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Well demarcated or defined, able to draw a line around it with confidence Examples: psoriasis
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Characteristics of Lesions - Border/Margin - Indistinct
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Poorly defined, have borders that merge into normal skin or outlying ill-defined papules Examples: Nummular eczema
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Characteristics of Lesions - Border/Margin - Active
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margin of lesion shows greater activity than center Examples: Tinea eruptions
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Characteristics of Lesions - Border/Margin - Irregular
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Nonsmooth or notched margin Examples: malignant melanoma
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Characteristics of Lesions - Border/Margin - Border raised above
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center of lesion depressed compared to the edge Examples: basal cell carcinoma center
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Characteristics of Lesions - Border/Margin - Advancing
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Expanding at margins Examples: cellulitis
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Characteristics of Lesions - Associated Changes within Lesions - Central clearing
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An erythematous boarder surrounds lighter skin examples: tinea eruptions
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Characteristics of Lesions - Associated Changes within Lesions - Desquamation
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Peeling or sloughing of skin Examples: rash of toxic shock syndrome
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Characteristics of Lesions - Associated Changes within Lesions - Keratotic
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hypertrophic stratum corneum Examples: calluses, warts
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Characteristics of Lesions - Associated Changes within Lesions - Punctation
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central umbilication or dimpling examples: basal cell carcinoma
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Characteristics of Lesions - Associated Changes within Lesions - Telangiectasias
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Dilated blood vessels within lesion blanch completely, may be markers of systemic disease Examples: basal cell carcinoma, actinic keratosis
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Characteristics of Lesions - Pigmentation - Flesh
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same tone as surrounding skin Examples: neurofibroma, some nevi
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Characteristics of Lesions - Pigmentation - Pink
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light red undertones examples: eczema, pityriasis rosea
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Characteristics of Lesions - Pigmentation - erythematous
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dark pink to red Examples: tinea eruptions, psoriasis
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Characteristics of Lesions - Pigmentation - Salmon
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orange-pink Examples: psoriasis
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Characteristics of Lesions - Pigmentation - Tan-brown
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light to dark brown Examples: Most nevi, pityriasis versicolor
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Characteristics of Lesions - Pigmentation - black
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black or blue-black Examples: malignant melanoma
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Characteristics of Lesions - Pigmentation - Purple
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Dark red-blue-violet Examples: purpura, Kaposi sarcoma
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Characteristics of Lesions - Pigmentation - Pearly
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shiny white, almost iridescent Examples: basal cell carcinoma
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Characteristics of Lesions - Pigmentation - Violaceous
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light violet Examples: erysipelas
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Characteristics of Lesions - Pigmentation - Yellow
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waxy Examples: lipoma
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Characteristics of Lesions - Pigmentation - White
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absent of color Examples: lichen planus
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Regional Distribution of Skin Lesions - Sun-exposed areas
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sunburn Lupus erythematosus Viral exanthema Porphyria
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Regional Distribution of Skin Lesions - Cloth-covered areas
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irritant contact dermatitis miliaria
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Regional Distribution of Skin Lesions - Flexural Aspects of extremities
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atopic dermatitis intertrigo candidiasis tinea cruris
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Regional Distribution of Skin Lesions - Extensor Aspects of Extremities
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Psoriasis
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Regional Distribution of Skin Lesions - Stocking & Glove (Acrodermatitis)
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viral exanthema/atopic dermatitis Tinea pedis with "id" reaction Poststreptococcal infection
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Regional Distribution of Skin Lesions - Truncal
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pityriasis rosea (Christmas tree pattern) Atopic dermatitis Drug reaction
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Regional Distribution of Skin Lesions - Face, Shoulder, Back
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Acne vulgaris Drug-induced acne Cushing syndrome
