Pigmented Desmoplastic Trichilemmoma Arising in Nevus Sebaceous: A Potential Mimicker of Pigmented Basal Cell Carcinoma

Adnexal Surgery – Case Report

Alhameedy M.M.a· Alrobaish O.A.a· Almarshoud S.b· Albahli R.b

Author affiliations

aDepartment of Dermatology, King Fahd Specialist Hospital, Buraydah, Saudi Arabia
bCollege of medicine, Qassim University, Buraydah, Saudi Arabia

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Article / Publication Details

Received: December 07, 2022
Accepted: February 28, 2023
Published online: April 13, 2023

Number of Print Pages: 4
Number of Figures: 3
Number of Tables: 0

ISSN: 2296-9195 (Print)
eISSN: 2296-9160 (Online)

For additional information: https://www.karger.com/SAD

Abstract

Introduction: Trichilemmomas are a form of benign adnexal neoplasm with differentiation toward the follicular outer sheath. Nevus sebaceous (NS) of Jadassohn is a congenital malformation characterized as a nonhereditary hamartoma of the adnexal structures of the skin, mainly the pilosebaceous unit. NS represents a fertile field for the development of secondary adnexal neoplasms, commonly benign but occasionally malignant. To our knowledge, one case of a pigmented desmoplastic trichilemmoma (DT) has been reported in the English literature. Case Presentation: We report a case of a 36-year-old male with pigmented DT that developed on long-standing congenital NS, mimicking pigmented basal cell carcinoma (BCC), which was successfully excised with 4-mm margins. Conclusion: Pigmented DT may mimic pigmented BCC on clinical and dermatoscopic examination; therefore, histological evaluation is always recommended to confirm the diagnosis.

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Received: December 07, 2022
Accepted: February 28, 2023
Published online: April 13, 2023

Number of Print Pages: 4
Number of Figures: 3
Number of Tables: 0

ISSN: 2296-9195 (Print)
eISSN: 2296-9160 (Online)

For additional information: https://www.karger.com/SAD

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