Masato Yamaguma,¹ Hideo Kurokawa,² Kuniyuki Matsubara,¹ Shoji Kanda,³ Hiroyuki Takahashi,⁴ Min Zhang,⁵ Sumio Sakoda,² Hiroshi Fukuyama^5
1Department of Dentistry and Oral Surgery, Japanese Seamen’s Relief Association Moji Hospital, Kitakyushu, ²Division of Oral and Maxillofacial Surgery, Department of Medicine of Sensory and Motor Organs, Faculty of Medicine, University of Miyazaki, Miyazaki, ³Dental Office of Kanda, Kitakyushu, ⁴Department of Radiology, Japanese Seamen’s Relief Association Moji Hospital, Kitakyushu, and ⁵Division of Oral Pathology, Department of Biosciences, Kyushu Dental College, Kitakyushu, Japan

Abstract
Salivary duct carcinoma is a rare aggressive malignancy occurring most often in the parotid gland and less commonly in the minor salivary glands. This report describes a patient with salivary duct carcinoma originating from the oral floor. A 60-year-old Japanese woman presented with a painless mass on the left oral floor for 1 month. The tumour was diagnosed as a salivary duct carcinoma. At the 5-year follow-up, the patient remains in good health and free of disease.

Key words: Middle aged, Mouth floor, Salivary glands, minor, Salivary gland neoplasms

Asian J Oral Maxillofac Surg. 2008;20:29-33.