Appendix testis

Appendix testis is a small, vestigial remnant found on the upper pole of the testis. It is also known as hydatid of Morgagni, named after the Italian anatomist Giovanni Battista Morgagni.

Anatomy

The appendix testis is a small, pedunculated appendage, which can be up to 5.5 mm in length. It is usually located on the upper pole of the testis, but can occasionally be found on the lower pole. It is derived from the Müllerian duct, which in males typically regresses during fetal development.

Clinical significance

The appendix testis has no known function in the human body. However, it can become inflamed or twisted, leading to a condition known as appendix testis torsion. This condition can cause severe pain and is often mistaken for testicular torsion, a more serious condition that requires immediate surgical intervention.

Diagnosis and treatment

Diagnosis of appendix testis torsion is typically made through physical examination and ultrasound imaging. Treatment usually involves pain management and observation, as the condition often resolves on its own. In some cases, surgical removal of the appendix testis may be necessary.

See also

• Testis
• Testicular torsion
• Müllerian duct