A 3 year-old boy. Sudden pain in the right site of the scrotum, later oedema and redness. Temperature is normal. Your diagnosis:
A. Testis torsion
B. Incarcerated inguinal hernia
C. Inflammation of testis
D. Lymphatic scrotal oedema
E. Allergic scrotal oedema
Answer: A. Testis torsion