| Summary points: | A 62-year-old male presents with a slowly growing lump on the left thyroid lobe measuring 5 x 3 cm. He has no hoarse throat, dyspnoea, dysphagia, or loss of appetite or weight. The case report outlines the patient's medical history, thyroid function test findings, and histopathology of the lump following surgical excision; some images are provided. The authors discuss the clinical features and histopathology of synovial sarcomas, review previously published cases, and discuss treatment options. |