Derma
Macules
- Ephelis (freckles)
- Melanocytic nevus
- Idiopathic guttate hypomelanosis
Patches
- Melasma
- Vitiligo
- Tinea versicolor
Papules
- Comedonal acne
- Molluscum contagiosa
- Verruca vulgaris
Plaque
- Atopic dermatitis
- Nummular dermatitis
- Tinea cruris
Nodules
- Acne
- Prurigo nodularis
- Neurofibromatosis
Tumors
- Acrochordon
- Keratoacanthoma
- Squamous Cell carcinoma
Wheals - evanescent/edematous
- Dermatographism (pressure induced)
- Acute/ Chronic urticaria
- Papular urticaria
\ Vesicles
- Varicella
- Miliara crystallina
- Dyshidrotic Dermatitis
Bullae
-tense in the Basement membrane zone 0 doesnt rupture
- Bullous pemphigoid
- Pemphigus vulgaris
- Bullous Fixed Drug Eruption
Pustules
- Folliculitis
- Pustular psoriasis
- Acute eneralized exanthematous pustulosis
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Keratinization - 28-30 days
Psoriasis 4-6 days only
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SECONDARY LESION
\ SCALES
- Scalp psoriasis
- Exfoliative dermatitis
- Pityriasis sicca (dandruff)
Crusts
- Impetigo
- Herpes zoster vesicles
- Herpes simplex - sec. bacteria
Excoriations - linear abrasion/ scratchmark
- Acne excoriee
- Uremic pruritus
Fissures
- Chronic hand dermatitis
- Heel fissures
\ Erosions loss of ALL/portion EPIDERMIS
- Without scar
- Pemphigus vulgaris
- SJS Stevens-Johnson syndrome
- Pressure injury
\ ULCER epidermis + dermis
- With scarring
- Pyoderma gangrenosum
- Stasis ulcer
- Basal cell carcinoma
\ SCARS dermis/deeper
- Atrophic scars in Discoid Lupus erythematosus
- Keloid sec. To acne
- Hypertrophic scar
\ Distribution
- Localized: atopic cheilitis
- Generalized: exfoliative dermatitis
- Bilateral/symmetric: allergic contact dermatitis (endogenous cause)
- Segmental: vitiligo
- Sun-exposed: actinic prurigo
- Sun-protected: pityriasis rosea
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- Extensor: infantile atopic dermatitis
- Flexor: adult atopic dermatitis
- Dermatomes: herpes zoster
- Intertriginous: candidal intertrigo
- Seborrheic: seborrheic dermatitis
- Follicular: Keratosis Pilaris
- Lines of cleavage: pityriasis rosea
- Lines of Blaschko: lichen striatus
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- Grouped/clustered: herpes zoster
- Scattered: varicella
- Annular: granuloma annulare
- Round/nummular/discoid: nummular eczema
- Arcuate: urticaria (Arch shaped)- incomplete shape of annular
- Linear - koebnerization in psoriasis
(due to scratching) appearance of new lesions in response to trauma/scratching
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- Stellate: calciphylaxis (star shaped)
- Serpiginous: CLM cutaneous larva migrans
- Targetoid- erythema multiforme (3 zones, pale ring , erythematous border)
- Whorled- incontinentia pigmenti
- Guttate: guttate psoriasis
- Reticular: erythema ab igne (lace like appearance)
\ COLOR
- White (depigmented) - Vitiligo
- White (hypopigmented) - tinea versicolor
- Brown - cafe-au-lait macules
- Black - melanoma
- Red (erythema) - Rubeola
- Purple (violaceous) - Kaposi sarcoma - px living w/ HIV
- Orange-red - pityriasis rubra pilaris
- Yellow - xanthelasma
- Green- pseudomonas infxn (pyocyanin)
- Blue - nevus of ota (deep layer of dermis), OCRANOSIS (prolonged use of hydroquinone)
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Pustule
Bullae
Nodule - deeper (Felt than seen)
Macule
Nodule
Crust
Impetigo
Excoriation - linear
Scar
Ulcer
Spider gangrenosum
Erosion
Atopic dermatitis
Popliteal fossa: palpable
Ill-defined / well-defined border
Erythematous (red)
Plaque
Patch
Patches
Yellowish scales
Seborrheic dermatitis - lesion on face, scalp
Psoriasis vulgaris - scalp, beyond hairline
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Plaque
Nummular
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