A male 15 year-old male, with no history of importance, was seen in the Emergency Department, presenting with a sudden and continuous pain in the left testicle. It was accompanied by a pain that radiated to the abdomen and left inguinal area, with nausea and vomiting of more than 12 h onset. Doppler ultrasound showed changes suggestive of testicular torsion. The affected organ is supplied by oxygenated blood by which of the following vesseles