Dermatology Flashcards
Bed bug bites
Tx: Topical steroids
Treatment for actinic keratosis
For numerous lesions –> topical 5-FU
Single lesions –> liquid nitrogen or curettage
Rules to diagnose melanoma
Asymmetry
Border irregularity
Color variegation
Diameter >6mm
Evolution
Squamous cell carcinoma
Bullous pemphigoid
Skin biopsy with direct immunofluorescence microscopy is the optimal diagnostic test for an autoimmune bullous disease.
Lentigo maligna
Lentigo maligna, which is a slow-growing type of melanoma most commonly seen on the face of older fair-skinned persons who have received a substantial amount of cumulative sun exposure with resultant evidence of sun damage. It has a prolonged radial growth phase and can be present for many years before developing an invasive component (vertical growth phase). Darker than solar lentigo
Dermatofibroma
Benign, brown-violet, firm papules about the size of a pencil eraser that are common on the lower extremities.
Acantholytic Dermatosis
(Grover Disease)
Sweet Syndrome
Typical lesions of Sweet syndrome are “juicy,” bright red, well-demarcated plaques with a sharp cut-off separating normal and inflamed skin that appear on the neck, upper trunk, and extremities.
Associated with malignancy
Basal cell carcinoma
Mucosal lichen planus
Characterized by white-reticulated network on the buccal mucosa; desquamative gingivitis; and chronic, painful erosions on the oral or vulvar mucosa.
Lichen planus
Autoimmune disease characterized by small polygonal violaceous papules, usually distributed symmetrically on the wrists, flexural aspects of the arms and legs, lower back, and genitals
Calciphylaxis
Calciphylaxis occurs in ESRD with high PTH. Intensely painful, angulated, retiform purpuric patches with areas of black necrotic tissue that may form bullae, ulcerate, and leave a hard, firm eschar.
Erythrasma
well-defined, pink-to-brown patches with fine scale, often in moist, occluded skin folds, and lesions fluoresce a bright coral-red color under a Wood lamp. Due to Corynebacterium.
