Final answer:
Testicular torsion left untreated can result in decreased fertility, chronic pain, and gangrene of the testicle.
Step-by-step explanation:
If testicular torsion is left untreated, it can lead to various complications. These include decreased fertility, chronic pain, and gangrene of the testicle.
Testicular torsion is a condition in which the spermatic cord twists, cutting off the blood supply to the testicle. Without prompt treatment, the lack of blood flow can cause permanent damage to the testicle and surrounding tissues.
Therefore, the correct answer is D. All of the above.