Twisting of the spermatic cord, leading to ischemia and possible testicular infarction; painful scrotal swelling; pain remains the same on increased with scrotal elevation (- Prehn's sign); pain accompanied with nausea and vomiting
History / PE:
Doppler U/S shows decreased blood flow to testes (as opposed to epididymitis )
Treatment:
Attempt manual detorsion
Immediate surgery to salvage testes (often insalvageable after 6 hrs)
Orchioplexy of BOTH testes to prevent future torsion