Case report: Malignant proliferating trichilemmal tumor of the thumb

Guojie Wang; Xuan Zhou; Junqi Luo; Qiyi Hu; Jie Zhang

doi:10.3389/fonc.2022.1005206

Case report: Malignant proliferating trichilemmal tumor of the thumb

Front Oncol. 2022 Oct 27:12:1005206. doi: 10.3389/fonc.2022.1005206. eCollection 2022.

Authors

Guojie Wang¹, Xuan Zhou², Junqi Luo¹, Qiyi Hu³, Jie Zhang⁴

Affiliations

¹ Department of Radiology, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China.
² Department of Pathology, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China.
³ Department of Nuclear Medicine, Fifth Affiliated Hospital of Sun Yat-sen University, Zhuhai, China.
⁴ Department of Radiology, Zhuhai People's Hospital, Zhuhai, China.

Abstract

Proliferating trichilemmal tumor is a very rare benign tumor that has the potential to transition into a malignant tumor. PTT most commonly affects the scalps of women above 60 years old and is frequently misdiagnosed due to its rarity. Herein, we present a case of a 68-year-old man with a malignant proliferating trichilemmal tumor on his right thumb. X-ray image showed a soft tissue mass on his thumb accompanied by bone destruction, while ¹⁸F-FDG PET revealed a hypermetabolic mass in the first index with axillary lymph node metastasis.

Keywords: 18-FDG; PET/CT; finger; malignant proliferating trichilemmal tumor; pathology.

Publication types

Case Reports