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Proliferating tricholemmal cyst: A possible pitfall in cytological diagnosis
Author(s) -
Biernat Wojciech,
Kordek Radzislaw
Publication year - 1996
Publication title -
diagnostic cytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.417
H-Index - 65
eISSN - 1097-0339
pISSN - 8755-1039
DOI - 10.1002/(sici)1097-0339(199607)15:1<73::aid-dc15>3.0.co;2-9
Subject(s) - medicine , cyst , pathology , radiology
We report a case of proliferating tricholemmal cyst, which made difficulties in the cytological analysis of the fine‐needle biopsy aspirates. This rare dermatopathologic entity is a possible diagnostic pitfall due to its close cytological resemblance to squamous cell carcinoma—the abundance of material, with predominance of squamoid cells, which form concentric structures (so‐called squamous eddies), that simulate keratin pearls of well‐differentiated squamous cell carcinoma. However, careful and strict application of the cytological criteria prevents overdiagnosis; the small squamoid cells that predominate in the smears occur mainly in clusters and sheets, they do not show prominent atypia, and the squamous eddies may not undergo complete keratinization. Diagn Cytopathol 1996;15:73–75. © 1996 Wiley‐Liss, Inc.