[Show abstract][Hide abstract] ABSTRACT: Synovial sarcoma is a rare mesenchymal malignancy which represents 8.5% of all soft tissue sarcomas and usually occurs in the lower extremities of young adults. Because the incidence in the head and neck region is very low, only 13 patients with endolaryngeal localisation have been reported so far. We present here a case of aryepiglottic synovial sarcoma. The tumour was completely resected, under suspension micro-laryngoscopy, using a CO2 laser. No recurrence was observed three years after the surgery. Complete surgical excision is the treatment of choice. The role of chemotherapy and radiotherapy is still debated. However, this tumour has a poor prognosis because of the occurrence of distant metastasis.