Doctors can often diagnose testicular torsion through physical examination of the genitals and abdomen. They may also perform a simple reflex test: when the doctor rubs the inside of the man's thigh, the patient's testicles should move upwards. A lack of movement could indicate testicular torsion. A urine test or an ultrasound scan of the testicles can also diagnose the condition. If these tests are inconclusive, or the man has had symptoms for some time, and the doctor is concerned about delaying further, he or she may opt to operate immediately and diagnose during surgery.

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