A case of simultaneous primary carcinomas of the tongue, histologically squamous cell and mucoepidermoid carcinomas, is presented. A 51-year-old male had a three-month history of a pain on the right side of the tongue. A 25×16mm hard tumor on the right side of the tongue extended to the floor of the mouth and a 18×8mm sized white, hard tumor on the left side of the tongue were seen. A small finger tip sized lymph node in the left upper neck was palpable. Postoperative histopathologic examination revealed a homolateral metastasis of the squamous cell carcinoma. The patient underwent a resection of three-fourths of the mobile portion of the tongue with bilateral neck dissection. His postoperative course was uneventful. A nine month follow-up found neither recurrence nor metastasis. To the best of our knowledge, this is the first case of simultaneous squamous cell and mucoepidermoid carcinomas of the tongue.
