Derm Pics: Common Dermatoses III and IV Flashcards
Describe and diagnose
-violaceous (purple tinge) papules with a bit of fine white scale
4 Ps = purple, pruritic, polygonal, papules
-often flat topped lesions w/ flat white scales
= Lichen Planus
Describe and diagnose
Flat topped papules on the flexor surface of the wrist (common location), kind of purple w/ a fine scale
-fine scale pointed to by white arrow
= Lichen Planus
Descrbe and diagnose:
- blue box pointing out kebnerization
- purple, polygonal papules
= Lichen Planus
Describe and diagnose:
Purple flat topped papules w/ fine white scale and nail findings
-nail findings seen in 10% of Lichen planus pts
Nail findings: thinning of nail plate w/ longitudinal fissuring of the shorted nail plates, violaceous discoloration of periungal area
Describe and diagnose:
Anular patches with elevated scaling border and central clearing
= Tinea Dermatophytosis (ring worm)
Anular patches with elevated scaling border and central clearing
= Tinea Dermatophytosis (ring worm)
Describe and diagnose
Onychomycosis (nail involvement) of tinea dermatophytosis
-yellow (discoloration) crumbly (immediately think fungal), thick, subungal debris
= Dysplastic nevi
-irregular appearing (dont follow ABCDE, often easily confused w/ melanoma) melanocytic nevi w/ cytologic/architectural atypia => diagnosed (and differentiated from melanoma) w/ biopsy
Typically fried egg appearance of dysplastic nevi
Describe and diagnose:
small monomorphic vesicles not on a erethematous base that don’t look easy to pop
= Dyshydrotix eczema
-most classic presentation = sides of fingers
Small flat topped monomorphic paples
= flat warts
Oil spots and pitting = classic nail findings of psoriasis
- psoriasis pts w/ nail findings are at increased risk for psoriatic arthritis
- also psoriasis pts at increased risk for CVD
= Seborrheic keratosis
Verrucous plaque, well demarcated border, looks “stuck on” (like you could peel it off)
Psoriasis
-ask about joint pain and counsel on CVD risk
= Seborrheic dermatosis
-erythematous patch (flat), yellow, characteristically in the nasolabial fold
Inverse psoriasis
-folds of the skin
Malignant melanoma
- asymmetrical
- irregular borders
- multiple colors
Lentigines = harmless hyperplasia of melanocytes in the epidermis
-lightly erythematous to tan or pink, generally flat or slightly raised
= Actinic Keratosis
Actinic Keratosis
Lightly erythematous to tan/pink flat and slightly raised
- superficial scale w/ roughened sand paper feeling
- scale can accumulate to form cutaneous horn (seen on answer of this card) = keratotic protuberance
^biopsy hyperkeratotic areas for potential squamous cell carcinoma
