This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
A 1 year old child presenting with abdominal mass and calcification on X – 
 rays is suggestive of : 
Select and explain. 
A. Teratoma, B. Neuroblastoma, C. Wilms tumour, D. Rhabdomyosarcoma
B: Neuroblastoma
Answer: B: Neuroblastoma 
Explanation: Both neuroblastoma and wilms tumor can present with abdominal mass and calcification.
But, at 1 year, it is most likely neuroblastoma.
The mean age of presentation of wilms tumor is 3 years.