Clinico-biological characteristics and prognosis of salivary duct carcinoma in 12 cases

Objective To explore the clinico-biological characteristics, treatment and prognosis of salivary duct carcinoma. Methods This study included 12 cases of salivary duct carcinoma treated in our hospital. Clinical data were retrospectively analyzed for patients admitted between April 1995 and October 2006. The clinical characteristics, histological features, imaging, therapy methods and prognosis were analyzed. Results Of 12 salivary duct carcinoma, there were 10 males, 2 females. The age of onset ranged from 53 to 73 year old and the average was 56 year old. Physical examination revealed a firm and unboundary mass accompanied by nerve infiltrating symptom. The histological appearance was characterized by solid cell nests with ductal structures and central comedonecrosis. Extensive resection and radical neck dissection was performed in 11 patients, postoperation radiation done in 10 patients and chemotherapy in 3 patients. One year survival rate was 83. 33% , that of 3 years was 41. 67% , and of 5 years was 25. 00% , the median survival time was 36 months. Conclusion Salivary duct carcinoma is a rare malignant salivary tumor and most patients are men. Regional extensive resection and postoperative radiation or chemotherapy are the mainstay of therapy. Lymph node metastases in level Ⅰ ,Ⅱ , Ⅲ are a common finding in patients with SDC and the prognosis is poor. Key words: Salivary gland neoplasms; Surgical procedures,operative; Prognosis