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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]

Quick Facts Details, Precursor ...
Appendix of testis
Thumb
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
Close
Thumb
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.

Clinical significance

Torsion

The appendix of testis can occasionally become twisted, causing acute one-sided testicular pain and may require surgical excision to achieve relief. One third of patients present with a palpable "blue dot" discoloration on the scrotum. This is nearly diagnostic of this condition. If clinical suspicion is high for the serious differential diagnosis of testicular torsion, a surgical exploration of the scrotum is warranted. Torsion of the appendix of testis occurs at ages 0–15 years, with a mean at 10 years, which is similar to that of testicular torsion.[1]

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See also

References

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