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Clear cell syringofibroadenoma (of Mascaro) of the nail
Author(s) -
Fouilloux B.,
Perrin C.,
Dutoit M.,
Cambazard F.
Publication year - 2001
Publication title -
british journal of dermatology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.304
H-Index - 179
eISSN - 1365-2133
pISSN - 0007-0963
DOI - 10.1046/j.1365-2133.2001.04099.x
Subject(s) - nail (fastener) , pathology , nail plate , papillomatosis , medicine , biology , anatomy , materials science , paronychia , metallurgy
Eccrine syringofibroadenoma (ESFA) is a rare disorder. We report the first case of ESFA of the nail apparatus, which presented as a yellow longitudinal onycholytic band of the left fourth finger over an intermittently painful subungual filamentous tumour. Histological examination showed features of ESFA with a digitate pattern of papillomatosis due to the specialized physiological longitudinal arrangement of the ridges in the nail bed. In addition, we describe a new feature of colloidal iron‐positive clear cells. In our case, the presence of two types of cells with a central ductal differentiation and a significant amount of mucopolysaccharides in clear cells could suggest differentiation towards both the ductal and the secretory portion of the eccrine gland.