Proliferating Trichilemmal Tumor

Title: Proliferating Trichilemmal Tumor

Authors: Dr Raghupathi.S, Dr Prakash, Dr Suma.S, Prof.P N Sreeramulu

DOI: https://dx.doi.org/10.18535/jmscr/v5i3.58

Abstract

The proliferating trichilemmal tumor (PTT) is a lesion with trichilemmal differentiation, more common occurring among elderly women; it affects the scalp with sizes ranging from 2to 10 cm. Microscopically, it is solid-cystic, well-defined, affecting the dermis and the subcutaneous cellular tissue. It presents trichilemmal and squamous keratinization. Pleomorphism may be present. Ghosts, apocrine and spindle cells can be observed. The differential diagnosis should be performed with malignant trichilemmal tumor and squamous cell carcinoma. Their behaviour is benign and complete resection is recommended. Herein, we report a case of well differentiated low-grade malignant PTT due to its rarity.

Keywords: Proliferating trichilemmal tumor (PTT), Squamous keratinization

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