Synovial Cell Sarcoma of the Kidney: A Case Report

Background: Primary renal sarcomas are rare neoplasm that accounts about 1% of malignant renal tumors. Prevelanceof primary renal Synovial cell sarcoma is rare and comprise 1-3% of all malignant renal neoplasm. Synovial cellsarcoma overlaps with multiple spindle cell neoplasms affecting the kidney, this need immunohistochemical panelto can diagnose it. This paper reports a case of Renal Synovial cell sarcoma. We report a case of 32 year old femalepresented with presented by upper pole left kidney swelling. Computarized tomography (CT) revealed a heterogeneous,well marginated soft tissue mass 8x7 cm arising in the upper pole of left kidney with solid necrotic components andheterogeneous enhancement. Left radical nephrectomy was done.Methods: The kidney was excised and gross examination revealed that upper pole of the kidney was replacedcompletely by grayish tan firm mass with cystic areas measuring 6x6x3 cm in diameter and shows areas of hemorrhageand necrosis. Microscopic evaluation and immunohistochemistry study were performed.Results: The mass was Renal Synovial cell sarcoma.Conclusion: Although Renal Synovial cell sarcoma is rarely diagnosed in kidney but it should be considered inthe differential diagnosis of spindle cell tumors affecting the kidney and must be excluded by immunohistochemicalstudies as it has poor prognosis in the kidney