system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
A 32-year-old Caucasian man presents to the physician because of the swelling and discomfort of the right testis for 3 weeks. There is no history of trauma, fever, or night sweats. He had surgery for an undescended right testis when he was 6 months old. There is no history of liver disease or hypogonadism. He has fathered 2 children. He takes no medications and denies any illicit drug use. The vital signs are within normal limits. Palpation of the scrotum reveals a firm nontender mass that cannot be separated from the right testis. Examination of the left testis shows no abnormalities. There is no supraclavicular or inguinal lymphadenopathy. Gynecomastia is present. The rest of the physical examination is unremarkable. Ultrasound shows an enlarged right testicle with a hypoechoic mass replacing a large portion of the normal architecture. The left testis is normal. The laboratory test results are as follows:
HCG Elevated
AFP Elevated
LDH Normal
Which of the following is the most likely diagnosis?
assistant
Embryonal carcinoma