[Two cases of pleomorphic adenoma of the nasal cavity].

Pleomorphic adenoma in the otorhinolaryngological field is frequently found in the major salivary glands, but is rare in minor salivary glands. Two cases of pleomorphic adenoma of the nasal cavity are reported. Case 1. A 26-year-old female who complained of nasal obstruction had a tumor arising from the right side of the nasal septum. The tumor, 1.5 x 1.5 x 1.2cm in size, was surgically removed utilizing an intranasal approach. Histologically, it was diagnosed as a pleomorphic adenoma of the nasal septum. There has been no recurrence. Case 2. A 51-year-old male had a tumor in the left lateral nasal wall. The tumor, 0.6 x 0.6 x 0.6 cm in size, was surgically removed by the intranasal approach. Histologically, it was diagnosed as a pleomorphic adenoma of the lateral nasal wall. There has been no recurrence. Including the present cases, 59 cases of pleomorphic adenoma arising from the nasal cavity have been reported in Japan. Of these, 51 arose from the nasal septum. Only 8 adenomas had arisen from the lateral nasal wall. Attention has been called especially to differences in the reported incidences of malignant tumors and recurrent tumors. In the present survey, the incidences were unusually low. Four cases (6.8%) have been reported as malignant tumors, and 3 (5.1%) as recurrent tumors.