A 15-year-old patient entered the emergency department with complains of severe pain in left scrotum and inguinal region, which started 2 hours ago after sudden physical activity. Patient is pale, covered with cold sweat. During examination the skin of scrotum is slightly oedematous, but there is no hyperemia. The left testis is a little bigger, with tension. The palpation of the left funiculus spermaticus is very painful. Your diagnosis is:
A. Acute orchitis
B. Venous thrombosis of funiculus spermaticus
C. Torsion of left testis
D. Varicocoele of the left side
E. Incarcerated left inguinal hernia
Answer: C. Torsion of left testis