title: Atypical polypoid adenomyoma
text: # Atypical polypoid adenomyoma
  
  Atypical polypoid adenomyoma (APA) is a rare benign tumour of the uterus.
  
  ## Pathology
  
  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.
  
  * Intermed. mag.
  * Very high mag.
  