Auspitz Sign
Pronunciation: OWS-pitz
A clinical sign in which removal of psoriatic scale produces multiple pinpoint bleeding points, reflecting the thinned suprapapillary epidermis and dilated capillaries beneath.
Full Definition
The Auspitz sign is elicited when the silvery scales of a psoriatic plaque are removed—either by gentle scraping or successive peeling—revealing a glossy red membrane (Bulkley membrane) and then multiple punctate bleeding points. The bleeding arises from the elongated dermal papillae with their closely apposed, tortuous capillaries, which lie just beneath an abnormally thin suprapapillary epidermis in psoriasis. It is considered a classic clinical sign of psoriasis vulgaris, though not entirely specific to it. Editors should capitalise 'Auspitz sign' (eponymous) and note the current style preference drops the possessive 's'.
Usage
Usage note: Use 'Auspitz sign', not 'Auspitz's sign', in line with modern dermatological style guidance. Capitalise as it is an eponymous clinical sign.
In Context
- "A positive Auspitz sign on the knee plaques supported the clinical diagnosis of psoriasis vulgaris." — Outpatient dermatology clinic letter
- "The trainee's case presentation correctly documented the Auspitz sign, distinguishing the lesion from seborrhoeic dermatitis." — Educational case presentation