Synovial sarcoma is an unusual mesenchymal neoplasm, appearing as a deep tumour of slow growth, with none or rare pain and few functional disturbances. These features usually lead to a late diagnosis. Previous injury is present in some cases but there is no proven ethilogical relation. We present a male, age 56, who suffered a serius feet injury leading to fracture of both calcaneus and II, III & IV MTT right foot with dislocation MTTfalangic of first finger. After surgery with closed Kirschner wires, the evolution was good. Ten months later a tumour appeared on the right foot, diagnosed as a synovial sarcoma after biopsy. The staging study showed multisystemic damage and the patient died 3 months later in spite of treatement. We address the difficulty of the differential diagnoses.

Synovial sarcoma is an unusual mesenchymal neoplasm, appearing as a deep tumour of slow growth, with none or rare pain and few functional disturbances. These features usually lead to a late diagnosis. Previous injury is present in some cases but there is no proven ethilogical relation. We present a male, age 56, who suffered a serius feet injury leading to fracture of both calcaneus and II, III & IV MTT right foot with dislocation MTTfalangic of first finger. After surgery with closed Kirschner wires, the evolution was good. Ten months later a tumour appeared on the right foot, diagnosed as a synovial sarcoma after biopsy. The staging study showed multisystemic damage and the patient died 3 months later in spite of treatement. We address the difficulty of the differential diagnoses.