Spindle cell/pleomorphic lipoma of the seminal vesicle: First description of a rare benign mesenchymal tumor

Pavel Lyatoshinsky; Manolis Pratsinis; Eva Markert; Hans-Peter Schmid; Gautier Müllhaupt

doi:10.1016/j.eucr.2023.102337

Spindle cell/pleomorphic lipoma of the seminal vesicle: First description of a rare benign mesenchymal tumor

Urol Case Rep. 2023 Jan 30:47:102337. doi: 10.1016/j.eucr.2023.102337. eCollection 2023 Mar.

Authors

Pavel Lyatoshinsky¹, Manolis Pratsinis^{1

2}, Eva Markert³, Hans-Peter Schmid¹, Gautier Müllhaupt¹

Affiliations

¹ Department of Urology, Institute for Medicine, University St. Gallen, St. Gallen, Switzerland.
² Department of Urology, University of California-Davis Medical Center, Sacramento, CA, USA.
³ Department of Pathology, Institute for Medicine, University St. Gallen, St. Gallen, Switzerland.

Abstract

We describe the first case of a spindle cell/pleomorphic lipoma of the seminal vesicle. A 6.2cm large mass originating from the left seminal vesicle was incidentally detected on imaging for peripheral arterial disease. A transrectal ultrasound-guided biopsy was negative for malignancy. We proceeded with a robotic tumor resection due to the size of the mass and sarcomatoid features present on MR imaging. The final pathological work-up revealed a spindle cell/pleomorphic lipoma, immunohistochemical staining was performed with no malignant features detected, in particular no signs of an atypical lipomatous tumor. Ejaculatory function was preserved with reduced volume at 6-weeks follow-up.

Keywords: Lipoma; Mesenchymal tumor; Seminal vesicle.

Publication types

Case Reports