Dermatology Flashcards

1
Q

Lupus pernio is pathognomonic of what?

A

Sarcoidosis

Note: erythematous/violaceous nodules/plaques over nose, cheeks and ears

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2
Q

___ is a descriptive term for a skin lesion that is raised and greater than 1 cm in diameter

A

Plaque

Note: if less than 1cm papule

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3
Q

In pemphigus vulgaris, mucous membrane involvement is common, and blisters are usually intact T/F

A

F - mucus membrane involvement is common but intact blisters are rare

Note:Skin biopsy for routine and direct immunofluorescence is needed to differentiate from bullous pemphigoid

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4
Q

Pemphigus or pemphigoid is characterized by shallow ulcers or fragile blisters that break open quickly.

A

Pemphigus

Note: Pemphigoid presents with stronger or “tense” blisters that don’t open easily.

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5
Q

Common causes of EM (erythema multiforme)

A

Herpes simplex virus infection is the commonest cause

Other common causes
Mycoplasma
Streptococci
Idiopathic
Drug-induced (sulfonamides, sulphonylureas, barbiturates)
systemic diseases (SLE, inflammatory bowel disease, malignancy)

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6
Q

Vitaligo is associated with what other pathologies?

A

Autoimmune thyroiditis
Pernicious anaemia
Alopecia areata
Diabetes mellitus

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