pediatrics
Hypertrophic Pyloric Stenosis
Symptoms and Signs of Hypertrophic Pyloric Stenosis
Symptoms of hypertrophic pyloric stenosis typically develop between 3 weeks and 6 weeks of life. Forceful vomiting, often described as "projectile" vomiting (without bile), occurs shortly after eating. Until dehydration sets in, children feed avidly and otherwise appear well, unlike many of those with vomiting caused by systemic illness. Gastric peristaltic waves may be visible, crossing the epigastrium from left to right. A discrete, 2- to 3-cm, firm, movable, and olive-like pyloric mass is sometimes palpable deep in the right side of the epigastrium. With progression of illness, children fail to gain weight, become malnourished, and develop Symptoms and Signs with electrolyte and acid-base abnormalities. 