Final answer:
The procedure that treats a congenital obstructive lesion found at the distal end of an infant's stomach is called Roux-En-Y.
Step-by-step explanation:
The procedure that treats a congenital obstructive lesion found at the distal end of an infant's stomach is called Roux-En-Y. In this procedure, the main section of the stomach is closed off from the digestive tract, and a small pouch is formed. The jejunum is then directly attached to that pouch, bypassing the stomach and duodenum. This surgical modification limits the intake of food and the absorption of nutrients.