Publications by authors named "L Pinquier"
Background: Microcystic adnexal carcinoma (MAC), syringomatous carcinoma (SC) and "Squamoid eccrine ductal carcinoma" (SEDC) are rare sclerosing adnexal tumours.
Objective: To understand the histogenesis of these tumours and possible clinical implications.
Methods: We conducted a retrospective study of 30 cases, 18 MAC, 5 SC and 7 SEDC reviewed and classified by a panel of dermatopathology experts, with immunohistochemical analysis of keratins, including K77, a new keratin specific of eccrine ducts, and PHLDA1 expressed in adnexal structures.
[Urticarial vasculitis associated with essential thrombocythaemia progressing to myelofibrosis].
Ann Dermatol Venereol
December 2014
Background: Urticarial vasculitis (UV) is a rare form of leukocytoclastic vasculitis in which skin lesions resemble urticaria. UV comprises hypocomplementemic and normocomplementemic subtypes. To date, only 4 cases of UV associated with myeloproliferative disorders have been described, including 3 cases with essential thrombocythaemia (ET) and one case with polycythaemia vera.
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- A study analyzed 119 granular cell tumors in skin from 114 patients over ten years to evaluate histopathological features, specifically looking for vascular invasion.
- The majority of tumors were classified as benign, with vascular invasion found in 23% of cases, but no malignant tumors were detected.
- Findings suggest that while local invasive features are common in these tumors, vascular invasion may not indicate a worse clinical outcome.
[Nevoid acanthosis nigricans or RAVEN (rounded and velvety epidermal nevus): three cases].
Ann Dermatol Venereol
March 2012
Background: We report three cases of a peculiar rash with mixed clinical features of both epidermal nevus and acanthosis nigricans. Their characteristics have been compared to those of very rare but similar cases found in the medical literature.
Patients And Methods: Two young adults (one male, one female) and a 7-year-old boy consulted for hyperchromic asymptomatic plaques located respectively on the right scapula, the left upper arm and the right frontotemporal area of the face.