Heterotopic endometrium of the fallopian tube.
D000328:Adult; D002828:Choristoma / Q000473:pathology*; D004717:Endometrium; D005185:Fallopian Tube Neoplasms / Q000473:pathology*; D005187:Fallopian Tubes / Q000473:pathology; D005260:Female; D006801:Humans; D008875:Middle Aged