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
Whic one of the following is the most common cause of abdominal mass in neonates - 
Select and explain. 
A. Neuroblastoma, B. Wilm's tumour, C. Distended bladder, D. Multicystic dysplastic kidneys
D: Multicystic dysplastic kidneys
Answer: D: Multicystic dysplastic kidneys 
Explanation: Ans. is 'd' i.e., Multicystic dysplastic Kidney's "Multicystic dysplastic kidney is the most common cause of an abdominal mass in the new born" - Nelson o Most common abdominal mass is a neonate --> Multicystic renal dysplasia. o Most common abdominal mass in 1 months to 3 years ---> Wilms tumor or multicystic renal dysplasia. o Most common renal problem in 3 to 6 years o Most common renal problem in 6 to 14 years Minimal change disease causing nephrotic syndrome. Acute post-streptococcal GN.