Li Jing, Li Jiang, Wang Li-Zhen, Li Lei, Fu Han-Bing
Department of Oral Pathology, Ninth People's Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, China.
Zhonghua Kou Qiang Yi Xue Za Zhi. 2011 Jun;46(6):355-9. doi: 10.3760/cma.j.issn.1002-0098.2011.06.010.
To analyze the clinicopathologic features of salivary malignant pleomorphic adenoma (MPA) (the subtype of the malignant component was classified as non-specific adenocarcinoma).
The clinical and pathological characteristics of 115 salivary gland tumors histologically diagnosed as MPA were analyzed.
In all the 65 MPA cases, there were 58 male and 7 female patients, and the mean age was 57 years (from 23 to 83). Sixty-one tumors were located in major salivary glands, and 4 in minor. Histologically the malignant components of 39 tumors were high-grade, 14 intermediate-grade, and 12 low-grade. Thirty-seven tumors were invasive carcinoma, 13 minimally invasive, and 15 non-invasive. The high-grade tumors had positive correlation with the invasive carcinomas (P < 0.05). The invasive carcinomas had positive correlation with TNM clinical stage (P < 0.05). The invasive carcinoma and the high-grade tumor had correlation with cervical lymph node metastasis (P < 0.05).
Non-specific adenocarcinoma are the most common malignant subtype in MPA. The invasive and the high-grade types are more likely to metastasize to cervical lymph node.
