This testis has undergone infarction following testicular torsion. Torsion is an uncommon condition, but is a medical emergency. It occurs when twisting of the spermatic cord cuts off the venous drainage, leading to hemorrhagic infarction. Greater mobility from incomplete descent or lack of a scrotal ligament predisposes to this condition. Immediate treatment by surgically untwisting and suturing the cord in place to prevent future torsion will prevent infarction. Sometimes, just the little appendix testis undergoes torsion.

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