Final answer:
Testicular torsion is the diagnosis the nurse expects for an adolescent male with severe acute scrotal pain and a history of cryptorchidism.
Step-by-step explanation:
The nurse would likely expect the diagnosis of testicular torsion for an adolescent male with severe acute scrotal pain and a history of cryptorchidism. Testicular torsion occurs when the spermatic cord twists, cutting off the blood supply to the testicle. This can cause severe pain, swelling, and can be a surgical emergency.