Renal Synovial Sarcoma- A Rare Primary Malignancy

Synovial sarcoma (SS) is a tumour of the soft tissues with a unique chromosomal translocation t(X;18)(p11.2;q11.2) detected by polymerase chain reaction in tissue homogenates. A 36 years old woman, with complaints of pain and lump in left flank was found to have a large lump occupying the left flank, left hypochondrium and the umbilical region, which was bimanually palpable and did not cross the midline. Investigations were suggestive of left RCC for which patient was operated. Intraoperatively, a tumour mass was seen replacing the whole kidney with involvement of left adrenal gland. Histopathology of the specimen revealed primary synovial sarcoma of left kidney.