This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Childhood Tumors, Subject name: Pediatrics
2 year old baby having testicular lump. Increased AFP diagnosis - 
Select and explain. 
A. Yolk sac tumor, B. Seminoma, C. Choriocarcinoma, D. Teratoma
A: Yolk sac tumor
Answer: A: Yolk sac tumor 
Explanation: Ans. is 'a' i.e., Yolk sac tumor o Germ cell tumor (GCT) include -SeminomaEmbryonal carcinomaChoriocarcinomaYolk sac tumorTeratomao All GCT except teratoma are malignant (in children),o MC GCT in children is benign teratoma,o MC malignant GCT in children is yolk sac tumor,o Tumor marker is important for evaluation,o [31 ICG and AF P are important marker,o AFP elevated is 90% of yolk sac tumor.o Elevated AFP in a child over I year with tests tumor almost always reflect yolk sac tumor.