The basal cell adenoma (BCA) is a benign monomorphic salivary gland tumor. Those of minor gland origin tend to occur within or adjacent to the upper lip (80 percent). The BCA is an encapsulated, slow-growing lesion which most commonly affects older persons. Several different histologic patterns can be noted, and often a combination of these variations is present within the same tumor. Simple surgical excision appears to be adequate treatment.