Epididymitis

A 26-year-old man comes to the emergency department for evaluation of acute testicular pain. The pain has been progressively worsening over the past five days. He has no pain with urination, but there is significant tenderness with manipulation of the scrotum. He is sexually active with two partners and does not use barrier protection. Temperature is 37.0°C (98.6°F), pulse is 94/min, and blood pressure is 125/80 mmHg. Physical examination reveals pain with palpation of the right testis posteriorly. Stroking of the right inner thigh results in elevation of the right testis. Which of the following additional clinical findings will most likely be observed in this patient?