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The presentation of canalicular adenoma peaks in the 7th decade of life and, like the basal cell adenoma, is more common in whites than blacks. There is a female predominance with a female-to-male ratio of occurrence of 1.8-1. This tumor most commonly involves the minor salivary glands of the upper lip (74%) or buccal mucosal (12%). Clinically it presents as a nonpainful submucosal nodule. On gross pathologic examination, canalicular adenomas may or may not possess a capsule and it is not unusual for there to be multifocal growth. Microscopically there are cords of single-layer columnar or cuboidal cells forming duct-like structures in a background of fibrous stroma.
The majority of monomorphic adenomas display nonaggressive behavior and are adequately treated with surgical excision.
Category: Pathology Notes
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