Derm Flashcards
Acanthosis nigricans. Associated condition?
Insulin resistance. GI malignancy
Multiple skin tags. Associated condition?
Insulin resistance. Pregnancy. Crohn’s Dz.
Porphyria cutanea tarda OR cutaneous leukocytoclastic vasculitis (palpable purpura) 2/2 cryoglobulinemia. Associated infection?
Hep C
Sudden onset severe psoriasis, recurrent herpes zoster, disseminated molluscum contagiosum. Associated infxn?
HIV
Severe seborrheic dermatitis. Associated conditions?
HIV or Parkinsons
Explosive onset of multiple, pruritic seborrheic keratoses. Associated condition?
GI malignancy
Pyoderma gangernosum. Associated condition?
IBD
What is the first antibody to appear in Hep B infxn?
anti-HBc IgM
Lead pipe colon on imaging, loss of haustra. DX?
UC
Skin w stuck on/waxy appearance
Seborrheic keratosis
red plaques, silvery-white scales, sharp margins. Dx?
Psoriasis
Most common type of skin cancer?
Basal cell carcinoma
Honey crusted lesions
impetigo
+ Nikolsky sign
pemphigus vulgaris. older patients. really bad.
- Nikolsky sign
bullous pemphigoid. Really old pts. Hemidesmosomes -subepidermal cleavage -No acantholysis -Linear IgG at basement membrane -Urticarial or eczematous prodrome -TEnse bullae -Rare oral/mucosal involvement Tx: steroids
flat-topped papules
Lichen planus
A chronic, inflammatory disease characterized by skin and/or mucosal lesions. Skin lesions are characterized by the 5P’s (planar, polygonal, pruritic, purple papules, and plaques). Involvement of the oral mucosa manifests as reticular white lines (Wickham striae).
Irislike target lesions
erythema multiforme
lesion occuring in geometric pattern in areas where skin comes into contact w clothing or jewelry
contact dermatitis
one large patch presents then many smaller ones appear, on trunk
pityriasis rosea
flat, often hyoppigmented lesions on the chest and back. KOH prep has spagehetti and meatballs appearance
Tinea (pityriasis) versicolor
Premalignant lsion from sun exposure that can lead to squamous cell carcinoma
Actinic Keratosis
Crusting vesicles in all stages of evolotion on body
primary lesions of varicella
acne vulgaris bacteria and most intense treatment
pripionibacterium. oral isotretinoin is last ditch tx. requires monthly blood test
Exophytic nodules on the skin with scaling or ulceration
second most common type of skin cancer: SCC
Describe findings of erythema marginatum. what dz is it a classic finding for?
centrifugally expanding pink rash. painless and non-pruritic. the E of JONES criteria in acute rheumatic fever.
