epididymal appendix

synonym: appendix epididymidis
https://doi.org/10.1351/goldbook.10669

Cystic structure sometimes found on the head of the epididymis.

Note: The epididymal appendix represents a remnant of the mesonephric duct.
Source:
PAC, 2016, 88, 713. (Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)) on page 750 [Terms] [Paper]