2- Derma

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

• \

• 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

• 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

• 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)