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What is A 10-day-old infant presents with projectile vomiting. His mother states that the infant will actively drink his milk, but he forcefully vomits after each feeding. The infant shows signs of failure to thrive, with weight loss, dehydration, and lethargy. Physical examination reveals a firm, nontender, mobile, "olive-shaped" epigastric mass. Which of the following is the most likely diagnosis? and explain in detail?
Congenital pyloric stenosis now called Infantile hyperophic pyloric stenosis. - Caused by hyperophy of circular muscle layer of pylorus, -Palpable mass in epigastrium. - Hyperophy of pyloric musculature -Obstruction,non-bilious projectile vomiting. - Male infants within first several days to weeks of life. -