1. A 21-year-old man presents to the Emergency Department. He is noted to have a firm scrotal mass..

1. A 21-year-old man presents to the Emergency Department. He is noted to have a firm scrotal mass which is non-tender on palpation. He states that it does not cause him any pain or discomfort but is worried that it may be something sinister. On further examination you note that the mass does not transilluminate. Routine blood investigations demonstrate an elevated alpha-fetoprotein. What is the most likely diagnosis? a) Seminoma b) Epididymal cyst c) Inguinal hernia d) Teratoma e) Testicular torsion