appendix of the epididymis

{{Infobox anatomy

| Name = Appendix of the epididymis

| Latin = appendix epididymidis

| Image = Gray1148.png

| Caption = The right testis, exposed by laying open the tunica vaginalis (appendix of epididymis labeled at center right)

| Image2 =

| Caption2 =

| System =

| Precursor = Wolffian duct

}}

The appendix of the epididymis (or pedunculated hydatid) is a small stalked appendage (sometimes duplicated) on the head of the epididymis. It is usually regarded as a detached efferent duct.

This structure is derived from the Wolffian duct (mesonephric duct) as opposed to the appendix testis which is derived from the Müllerian duct (paramesonephric duct) remnant.