Appendix epididymis

Definition

On the head of the epididymis is a small stalked appendage (sometimes duplicated). It is named the appendix of the epididymis (or pedunculated hydatid), and is usually regarded as a detached efferent duct. This structure is derived from the Wolffian duct as opposed to the appendix testis which is derived from the mullerian duct remnant.

Also known as appendix of epididymis, epididymal appendix, epididymis appendix — per UBERON

The Appendix epididymis is a part of the Reproductive.