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J Eur Acad Dermatol Venereol. 2019 Apr 13. doi: 10.1111/jdv.15621. [Epub ahead of print]

Malignant proliferating trichilemmal tumour arising on a trichilemmal cyst with dermoscopic and histopathologic findings.

Author information

1
Health Science University, Ankara Oncology Training and Research Hospital, Department of Dermatology, Ankara, Turkey.
2
Ankara University, Faculty of Medicine, Department of Plastic, Reconstructive and Aesthetic Surgery, Ankara, Turkey.
3
Ankara University, Faculty of Medicine, Department of Dermatology, Ankara, Turkey.
4
Ankara University, Faculty of Medicine, Department of Pathology, Ankara, Turkey.

Abstract

Cutaneous adnexial tumours derived from the outer root sheath of hair follicles are trichilemmal tumours or pilar cysts. These tumours show trichilemmal keratinization as formation of a dense keratin layer without interposition of the granular cell layer.1 Trichilemmal cysts can form rapidly multiplying trichilemmal tumors, also called proliferating trichilemmal tumour (PTT) or cyst. This article is protected by copyright. All rights reserved.

KEYWORDS:

dermatoscopy; dermoscopy; histopathology; malignant proliferating trichilemmal tumour; trichilemmal cyst

PMID:
30980552
DOI:
10.1111/jdv.15621

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