5 Derm Flashcards
Red swollen foot DDX
Cellulitis, DVT, gout, CPPD, stasis dermatitis, septic arthritis (must r/o)
PE to do with cellulitis…
Check lymph! Check regional lymph nodes and look for streaking (lymphangitis)
Guaranteed quiz question
Erythema Nodosum
Indurated nodules that look like bruises, slowly change color. Shins. must look for underlying disorder.
Inflammation of skin and subQ tissue (panniculitis)
Intertriginous
Creases: armpits, inguinal folds, under the breasts, between toes/fingers
(Erythasma lives here)
Balanitis
Candidiasis on penis/groin
Miliaria
Heat rash. Accumulation of sweat beneath eccrine sweat ducts –> keratin obstruction. Pruritis. Small red papules. Children/babies
Cellulitis
Acute bacterial infection of the skin. PE…
Immuno compromised. Distribution: lower leg, children–cheeks, perioribital (EMERGENCY), head, neck
Cutaneous abscess
Localized collection of pus under skin. Painful, tender, induration
Erysipelas
Superficial cellulitis with dermal lymphatic involvement (streaking). Shiny, raised, indurated, plaque like lesions. Legs (then face)
Erysipeloid
Violaceous on hands and forearms. Rare
Erythasma
Superficial intertriginous infxn with Corynebacterium. Dx: Wood’s lamp, skin scraping
Folliculitis
Inflammation of hair follicle. S aureus, fungal, trauma, corticosteroids. Pustule or inflammatory nodule. If from hot tub–pseudomonas
Furuncle
Boil. Acute tender nodules. S aureus. Drains to the surface. Culture to r/o MRSA.
Carbuncle
Cluster of furuncles with multiple draining orifices. More systemic symptoms.
Impetigo
Superficial acute skin infection with honey colored crusting. Clusters of vesicles or pustules that rupture.
Candidiasis
Intertriginous, erythematous, well-demarcated, pruritic patches. Satellite lesions.
Dermatophytoses
Fungal infxn of keratin in skin and nails. Tinea….
Tinea barbae
Beard fungus. Pruritic, painful, swollen
Tinea capitis
Fungus that can cause hair loss. More common in African and Hispanic descent
Tinea corporis
Pruritic, circular/oval, erythematous, scaling. Slightly raised, pale in middle
Tinea cruris
Jock itch. Causes: obesity, diabetes, immunodeficient. Partial central clearing, slightly elevated, erythematous active border
Tinea pedis
Athletes foot. Common. Intensely pruritic. Erythematous vesicles or bullae between toes or on soles.
Tinea versicolor
Superficial fungus infection with Melassezia furfur. Hypo/hyper pigmented macules with scaling patches. Trunk and proximal upper extremities.
Cutaneous larva migrans
Creeping eruption. Caused by hookworm larva. Intensely pruritic, erythema, serpinginous. DDX: scabies
Lice
Pediculosis. Wingless, blood sucking insects. Head. Nits “glued on” shaft 1cm from scalp.m
Scabies
Infection of skin with mite. Burrows are pathognomic. Wavy lines with papules.
Hands, arms (feet, gluteal fold, axilla, back of knees)
Molluscum contagiosum
2-10 lesions. Caused by pox virus in epidermal cells. Esp ages 3-9yrs. Smooth, flesh colored, umbilicated, indurated. Self-limiting
Warts
Verrucae vulgaris. Benign, contagious, caused by HPV.
Common wart
Dome, round, or irregular. 2-10mm. Usually asx. Skin lines interrupted by hyper keratosis. Black puncta when scraped with pinpoint bleeding.
Filiform wart
Long, narrow, soft. Eyelids, face, neck
Flat wart
Smooth, flat, yellow, brown, flesh colored. 2-3mm
Plantar wart
Soles of feet. Single or multiple. Painful and callused. Black puncta present.
Mosaic wart
Multiple plantar warts
Condylloma accuminata
Genital warts. Soft, moist papules or plaques on perineum, external genitalia, anus, vagina, cervix
Varicella
Chicken pox. Acute, highly contagious vesicular eruption caused by primary infxn with HHV. Papules, macules, vesicles, pustules, crusts.
Herpes simplex
Recurrent viral infxn w intraepidermal infxn by HSV. Herpes hurt. Ulcerated/weakling lesions. Outbreaks following stress.
Herpes zoster
Shingles. Latent varicella infxn. Virus remains in nerve roots and erupts along the dermatome. Systems sxs, severe pain.