Case Report: A case of primary renal synovial sarcoma

This case report describes a 53-year-old male patient with primary renal synovial sarcoma. He initially presented with intermittent pain in the lumbar and abdominal regions. Imaging revealed a left renal mass measuring approximately 13.3 cm × 11.6 cm. After radical left nephrectomy, pathological diagnosis was confirmed through immunohistochemical analysis and genetic testing, which identified an SS18-SSX2 fusion, leading to a definitive diagnosis of primary renal synovial sarcoma. Postoperatively, the patient received chemotherapy with epirubicin combined with ifosfamide. Follow-up showed no significant evidence of metastasis or recurrence. This report aims to provide clinical reference regarding the imaging findings and diagnosis of this rare disease, primary renal synovial sarcoma.