What condition is indicated by non-bilious vomiting and an olive-like mass in the right upper quadrant?

The condition indicated by non-bilious vomiting and an olive-like mass in the right upper quadrant is pyloric stenosis. This condition is most commonly seen in infants and involves the narrowing of the pylorus, the opening from the stomach into the small intestine. As the pylorus narrows, it leads to obstructive symptoms. Non-bilious vomiting occurs because the obstruction prevents food from passing from the stomach into the intestine. The vomit will not contain bile, as the obstruction is prior to the entry of bile (which is produced in the liver and released into the duodenum).

The olive-like mass is the hypertrophied pylorus that can often be palpated in the right upper quadrant of the abdomen during a physical examination. This characteristic finding, coupled with the vomiting pattern, is key in making the diagnosis of pyloric stenosis. Early recognition and treatment are crucial, as untreated pyloric stenosis can lead to dehydration and electrolyte imbalances.

Other conditions listed, like intestinal obstruction, appendicitis, and hernia, can present with abdominal pain and other vomiting types, but they typically do not present with the specific olive-like mass or the distinct pattern of non-bilious vomiting seen in pyloric stenosis. Understanding these