APAs are characterized by
glands with abnormal shapes that: (1) often have
squamous metaplasia, and (2) are surrounded by benign
smooth muscle.
Nuclear atypia, if present, is mild. The microscopic
differential diagnosis includes
endometrial carcinoma and endocervical adenocarcinoma. Image: Atypical polypoid adenomyoma - intermed mag.jpg | Intermed. mag. Image: Atypical polypoid adenomyoma - very high mag.jpg | Very high mag. ==See also==