Primary Renal Synovial Sarcoma Mimicking Transitional Cell Carcinoma: A Case Report.

Authors

Pilwon Jeong, Suhong Kim, Heejung Kwon

Published in

Journal of the Korean Society of Radiology. Volume 87. Issue 5. Pages 946-951. Epub Sep 22, 2026.

Abstract

Primary renal synovial sarcoma (PRSS) is a rare malignant tumor with nonspecific imaging characteristics. This case concerns an 80-year-old man who presented with hematuria and flank pain. CT revealed a small left renal mass that rapidly enlarged over 3 months, with biopsy findings suggesting synovial sarcoma. A radical nephrectomy confirmed monophasic PRSS with SS18-SSX-positive staining. However, no recurrence was observed during the 2-year follow-up period. PRSS should be considered for atypical renal masses, and diagnosis requires histopathological examination combined with molecular testing.

PMID:
42903046
Bibliographic data and abstract were imported from PubMed on 22 Oct 2026.

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