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The Korean Journal of Pathology 2011;45(Suppl 1): S11-S14.
doi: https://doi.org/10.4132/KoreanJPathol.2011.45.S1.S11
Ectopic Epididymis in Testicular Appendices: Report of Two Cases.
Hyun Soo Kim, Gou Young Kim, Hyung Lae Lee, Youn Wha Kim, Sung Jig Lim
1Department of Pathology, Kyung Hee University School of Medicine, Seoul, Korea. sungjig@khu.ac.kr
2Department of Urology, Kyung Hee University School of Medicine, Seoul, Korea.
We report two cases of ectopic epididymal ducts and efferent ductules in the testicular appendices (TAs) of adult men with normally descended testes. In both cases, a sessile TA was incidentally found at the upper pole of the right testis during the scrotal hydrocelectomy. Microscopically, a few closely arranged tubules were detected within the TA. In the first case, the tubules were lined with a pseudostratified columnar epithelium with numerous, long microvilli, and were surrounded by a smooth muscle coat. In contrast, in the second case, the tubules had a wavy luminal surface, because ciliated columnar cells alternated with groups of cuboidal cells. In both cases, strong CD10 immunoreactivity was observed in the luminal border of the lining epithelium. Surgical pathologists should be aware of the presence of both ectopic epididymal ducts and efferent ductules that can occur in TAs, in order to avoid misinterpretation as transected, functional reproductive structures.
Key Words: Parovarian cyst; Choristoma; Epididymis; Wolffian ducts