Atypical polypoid adenomyoma
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| name = Atypical polypoid adenomyoma
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| image = Atypical polypoid adenomyoma - high mag.jpg
| caption = Micrograph of an atypical polypoid adenomyoma. H&E stain.
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| field = Pathology
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Atypical polypoid adenomyoma (APA) is a rare benign tumour of the uterus.{{Cite journal | last1 = Jakus | first1 = S. | last2 = Edmonds | first2 = P. | last3 = Dunton | first3 = C. | last4 = Holland | first4 = G. | title = Atypical polypoid adenomyoma mimicking cervical adenocarcinoma. | journal = J Low Genit Tract Dis | volume = 6 | issue = 1 | pages = 33–8 |date=Jan 2002 | doi = 10.1046/j.1526-0976.2002.61007.x| pmid = 17050990 | s2cid = 22702788 }}
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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.
Image: Atypical polypoid adenomyoma - intermed mag.jpg | Intermed. mag.
Image: Atypical polypoid adenomyoma - very high mag.jpg | Very high mag.