Atypical Polypoid Adenomyoma Mimicking Cervical Adenocarcinoma

Atypical polypoid adenomyoma (APA) of the uterus is a rare, benign lesion. Histologically, it is composed of a glandular and squamous cell proliferation with architectural complexity and cytologic atypia of glands, and a hypercellular smooth muscle stroma. APA is difficult to distinguish from well-differentiated adenocarcinoma of the uterus. In the case presented, the diagnosis of APA was confused pathologically, radiographically, and clinically with a cervical adenocarcinoma. A review of the English literature is presented.