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Synovial sarcoma is a malignant soft tissue tumor predominantly affecting the lower limbs of children and young adults. It accounts for approximately 5% to 10% of soft tissue tumors and often has a poor prognosis. The tumor can also be found in other regions such as the head and neck, heart, abdominal wall, mediastinum, and lung. Accurate diagnosis is crucial for treatment management, as the differential diagnosis can include various other sarcomas and tumor types. The SS18-SSX fusion transcript is a signature marker of this tumor, with a translocation involving chromosomes X and 18, present in about 90% of cases.