TRUE/FALSE about features of Pyloric stenosis: 1. Hypokalemic alkalosis 2. Peristalsis right to left 3. Commonly caused by carcinoma stomach 4. Retention vomiting is present 5. Commonly females are affected

Hyperophic pyloric stenosis is more common in males. Male : female incidence is 4:1. Peristalsis is seen from left to right across the upper abdomen. Retention vomiting means vomiting due to any mechanical obstruction occurring usually hours after ingestion of a meal. In hyperophic pyloric stenosis the vomiting usually occur 10 to 30 min after the feed. Ref: Nelson 17/e, Page 1229