Appendix of testis

Appendix of testis
The right testis, exposed by laying open the tunica vaginalis (appendix of testis is labeled at right)
Details
PrecursorParamesonephric duct
ArteryTesticular artery
VeinTesticular vein, pampiniform plexus
Identifiers
Latinappendix testis
TA98A09.3.02.010
TA23612
FMA19846 19846, 19846
Anatomical terminology
Scrotal ultrasonography of an 85-year-old man with hydrocele, making the appendix of the testicle clearly distinctive as a 4 mm outpouching at upper right in image. Doppler shows some blood flow.

The appendix testis (or hydatid of Morgagni) is a vestigial remnant of the Müllerian duct, present on the upper pole of the testis and attached to the tunica vaginalis. It is present about 90% of the time.[citation needed]