hydatid of Morgagni(torsion)
The hydatid of Morgagni is a small embryological remnant at the upper pole of the testis. Torsion of the hydatid is of no consequence in itself except that it presents a similar picture to torsion of the testis which is a surgical emergency.
The pain from a torsion of the hydatid is usually less severe and has a longer history than for a torsion of the testis. Occasionally, the torted hydatid may be palpable or be visible through the scrotal wall on transillumination as a "blue dot" on the scrotum. Scrotal ultrasound may be able to delineate the enlarged appendage and a normal testis.
If in doubt, the scrotum should be explored to rule out testicular torsion and remove the infarcted hydatid.
Removal of the opposite appendage is not indicated.
Last reviewed 01/2018