Tenosynovial giant cell tumor of digit diagnosed on cytology: A case report.

Tenosynovial Giant Cell Tumor (TSGCT) is a solitary, firm, and extra-articular localized benign soft tissue tumor that may present with painless swelling for many years. It usually involves the tiny joints of the extremities in the hands and feet. Here, we present the case of a male in his 20s who presented with a painful, stiff, slow-growing mass over the distal interphalangeal joint of the right-hand ring finger. Fine Needle Aspiration Cytology (FNAC) was performed and based on the microscopic features, it was reported as a case of Tenosynovial Giant Cell Tumor. Surgical excision of the swelling was performed and histopathological examination confirmed the diagnosis. The rarity of this case arises from the fact that the diagnosis of TSGCTwas established on cytology, as TSGCTis very rarely reported on cytology. [ABSTRACT FROM AUTHOR]