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
Reflux into grossly dilated ureter belongs to which grade of Vericoureteric Reflux ? 
Select and explain. 
A. Grade II, B. Grade III, C. Grade IV, D. Grade V
C: Grade IV
Answer: C: Grade IV 
Explanation: Grading of VUR based on radiocontrast MCO :



Grade
Description


I
Reflux into non - dilated distal ureter


II
Reflux into upper collecting system in non dilated ureter


III
Reflux into dilated ureter


IV
Reflux into grossly dilated ureter


V
massive Reflux with ureteral dilation , tortuous effaced calyces