Appendix testis

Appendix testis

Infobox Anatomy
Name = PAGENAME
Latin = appendix testis
GraySubject = 258
GrayPage = 1242


Caption = The right testis, exposed by laying open the tunica vaginalis.


Caption2 =
System =
Artery =
Vein =
Nerve =
Lymph =
Precursor = Müllerian duct
MeshName =
MeshNumber =
DorlandsPre = a_54
DorlandsSuf = 12147714
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.

Clinical significance

Although it has no physiological function, it can be medically significant in that it can, rarely, undergo torsion (i.e. become twisted), causing acute one-sided testicular pain and may require surgical excision to achieve relief. 1/3 of patients present with a palpable "blue dot" discoloration on the scrotum. This is nearly diagnostic of this condition. Although if clinical suspicion is high for testicular torsion, a surgical exploration of the scrotum is warranted.

Occasionally a torsion of the hydatid of Morgagni can produce symptoms mimicking those created by a testicular torsion; a torsion of the hydatid, however, does not lead to any impairment of testicular function. Some hospitals may misdiagnose this as Gastroenteritis, a small intestine infection, if blood is present in stool. This, however, is only coincidental and completely unrelated.

ee also

* Giovanni Battista Morgagni

External links

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