Open AccessAn Unusual Presentation of Proliferating Trichilemmal Tumor Developing in Psoriatic Plaque: A Case Report
Author(s) -
Gökçe Işıl Kurmuş,
Müzeyyen Gönül,
Filiz Canpolat,
Can Ergin,
Bilgihan Açıkgöz,
Murat Alper
Publication year - 2020
Publication title -
yüksek i̇htisas üniversitesi sağlık bilimleri dergisi :
Language(s) - English
Resource type - Journals
ISSN - 2717-9257
DOI - 10.51261/yiu.2020.00022
Subject(s) - nodule (geology) , outer root sheath , medicine , scalp , pathology , psoriasis , follicular cyst , dermatology , neoplasm , cyst , biology , immunohistochemistry , paleontology
Proliferating trichilemmal tumor (PTT) is a rare, mostly benign neoplasm which stems from the follicular outer root sheath epithelium. PTT occurs as a subcutaneous cystic nodule slowly enlarging to a larger noduler mass, and is usually localized on the scalp of elderly women. To the best of our knowledge, PTT localized on a psoriatic plaque has not been reported previously. Herein, we report an unusual case of benign PTT arising from a psoriatic plaque on the knee of a 63-year-old male patient. Keywords: proliferating trichilemmal tumor, psoriasis, trichilemmal cyst