Pili Torti – Hair Shaft Abnormality =الاشعار الملتوية PILI TORTI The short and brittle hairs in patients with pili torti, when viewed through a microscope, appear flattened and twisted through 90° to 360°. The twisting must be differentiated from the normal twisting in the hair of black individuals and in the pubic/axillary hairs of […]
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Pilomatrixoma PILOMATRICOMA Epidemiology. Pilomatricoma most commonly occurs in children and young persons.Some tumors arise in older adults. Mutation of the β-catenin gene, a mediator in the Wnt signal transduction pathway, is common in pilomatricomas. Etiology. Pilomatricoma (calcifying epithelioma of Malherbe) is a relatively common appendage tumor that predominantly shows differentiation toward […]
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Pincer nail =الظفر الكللابي او بشكل الكماشة Pincer Nails Pincer nails is a painful abnormality that usually affects the toenails and may be associated with subungual exostosis. The distal nail plate is overcurved and compresses the subungual soft tissues
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Pinkus-tumor=Premalignant Fibroepithelial Tumor = ورم بينكوس Pinkus Tumor The fibroepithelioma of Pinkus is an unusual neoplasm that was first described by Hermann Pinkus in 1953 as a premalignant fibroepithelial tumor. Clinically, the lesion is a benign-appearing, pedunculated, pink tumor that may resemble an acrochordon. However, Pinkus noted 4 such lesions to have a peculiar […]
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Pinta =البينتا PINTA (CARATE, MAL DE PINTA, AZUL) Epidemiology and Etiology Pinta (“colored spot” in Spanish) is caused by T. carateum, named after the Colombian word for the disease (carate). The organism can be propagated only in primates, and no isolates are known to exist. The disease affects predominantly poor, undernourished infants, children, […]
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Pitted keratolysis = انحلال الطبقة القرنية المنقر Pitted Keratolysis Pitted keratolysis involves the stratum corneum of the web spaces and plantar surface. Originally named keratoma plantare sulcatum by Castellani in 1910, this disease has become more commonly called by its current name after Taplin and Zaias coined it in 1967. The disease was […]
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Pityriasis lichenoid chronica= النخالية الحزازانية المزمنة PITYRIASIS LICHENOIDES Epidemiology Pityriasis lichenoides affects all racial and ethnic groups in all geographic regions. It is more common in children and young adults but can affect all ages. PLC is three to six times more common than PLEVA. Etiology and Pathogenesis The etiology of pityriasis lichenoides is […]
Read MorePityriasis rosea = النخالية الوردية Article Index Pityriasis rosea = النخالية الوردية Pityriasis rosea 2 Pityriasis rosea 3 All Pages Pityriasis Rosea The term pityriasis rosea (PR) was first used by Gibert in 1860 and means pink (rosea) scales (pityriasis). PR is a common acute, self-limited skin eruption that typically begins as a […]
Read MorePityriasis rubra pilaris = النخالية الحمراء الجرابية
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Pityriasis lichenoides chronica = النخالية الحزازانية المزمنة PITYRIASIS LICHENOIDES Epidemiology Pityriasis lichenoides affects all racial and ethnic groups in all geographic regions. It is more common in children and young adults but can affect all ages. PLC is three to six times more common than PLEVA. Etiology and Pathogenesis The etiology of […]
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