Well-differentiated Papillary Mesothelial Tumor of Tunica Vaginalis: A Case Report.

Authors

Yuko Ueda, Kazutomo Kuwata, Hiroshi Toge, Kanako Sagan, Yasuo Kohjimoto

Published in

Urologia internationalis. Pages 1. Aug 26, 2026. Epub Aug 26, 2026.

Abstract

Well-differentiated papillary mesothelial tumor (WDPMT) of the tunica vaginalis is an extremely rare entity that was recently reclassified by the World Health Organization.
We report a case of WDPMT in which intraoperative frozen section analysis suggested a malignant tumor, leading to radical orchiectomy. Postoperative histopathological examination demonstrated papillary mesothelial proliferation with retained BAP1 and MTAP expression, supporting the diagnosis of WDPMT.
This case highlights the diagnostic challenges of WDPMT during surgery and the limitations of intraoperative frozen section analysis.

PMID:
42647425
Bibliographic data and abstract were imported from PubMed on 27 Aug 2026.

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