POORLY DIFFERENTIATED SYNOVIAL SARCOMA: REPORT OF TWO CASES WITH UNUSUAL PRESENTATION

Prajwala Gupta, Deepika Gupta*, Minakshi Bhardwaj, Aastha Gupta

ABSTRACT

Synovial sarcomas are rare malignant soft tissue tumors affecting mainly young adults and presenting as a slow growth mass located in the deep soft tissues of extremities, near the joints. The poorly differentiated forms may be indistinguishable from other round cell tumors based on the morphology alone or at times by immunohistochemical studies. Here in, we describe 2 unusual presentations; first one as an extremely rare case of poorly differentiated synovial sarcoma of the foot metastasizing to inguinal lymph nodes and other case presenting as a localised swelling in the palm. Fine needle aspiration cytology (FNAC) with immunohistochemistry (IHC) was helpful in the early diagnosis and differentiating it from its closest differential Ewings sarcoma.

Keywords: Immunohistochemistry, synovial sarcoma, FNAC, Ewings sarcoma, metastasis.