[Synovial sarcomas of the neck].

The synovial sarcoma is a mesenchymal tumour that is very rare in the head and neck region. This is a report on two cases. In a 30-year old patient the tumour arose near the thyroid gland and the hypopharynx. He died in spite of surgical removal, radiotherapy and chemotherapy, one year after the first symptoms. An 8-year old boy was affected by a synovial sarcoma near the hyoid bone and is without recurrence after surgical removal, radiotherapy and chemotherapy. Subsequently, the main diagnostic characteristics of these tumours are discussed. A better prognosis of the tumours associated with the hyoid bone is a remarkable fact.