Aberrant epididymal tissue is uncommon and may be associated with an undescended testis. To the best of our knowledge, aberrant epididymal tissue has not been described in a testicular appendix. We report the case of a 7-year-old boy with left cryptorchidism who underwent a homolateral orchidopexy. At operation, the surgeon removed a pedunculated appendix testis containing an epididymal heterotopia. This Wolffian-derivative tissue was confirmed by the diffuse strong CD10 reactivity of the luminal border of the epithelial cells. Awareness of this aberrant tissue avoids misinterpretation as a transected functional reproductive structure.
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Val-Bernal, J.F., Val, D. & Garijo, M.F. Ectopic epididymal tissue in appendix testis. Virchows Arch 449, 373–375 (2006). https://doi.org/10.1007/s00428-006-0248-8
- Appendix testis
- Hydatid of Morgagni
- Wolffian remnants
- Müllerian remnants
- Embryologic remnants