Basal cell adenocarcinomas of the submandibular and parotid glands recognized simultaneously report of a case.

Basal cell adenocarcinomas (BCAC) of the major salivary glands are rare tumors. We experienced a case of BCACs that were recognized simultaneously in the submandibular and parotid glands. The case like this has not been reported previously. We present the case and discuss clinicopathologically the relation between the both tumors. Macroscopically, there was no direct infiltration between the both tumors. Microscopically, neural and perineural invasion were not found in both tumors. Distant hematogenous metastasis to other organs was not found. The fact that the parotid tumor had strong necrotic change and had no nodal structure suggests that the metastatic node had been rapidly enlarged beyond the size of the normal lymph node. It is reasonable to suppose that the submandibular tumor is a primary lesion and the parotid tumor is a metastatic lymph node.