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
Marker for seminoma testis is -
assistant
The correct answer is  Normally seminoma cells do not contain AFP and HCG.
"Approximately 15% of seminomas contains syncytiotrophoblasts which secret HCG"  ------ Robbin's 1042
Seminoma is positive for placental alkaline phosphatase and keratin.