All patients underwent evaluation of gastric emptying and electrogastrography (EGG). Results: Seven patients met the criteria for diagnosis of PIGP. Patients' age ranged from 3 months to 47 years.

Gastric scintigraphy failed due to persistent vomiting and the patient was therefore excluded. A 19-year-old patient had persistent vomiting for 12 months after an acute episode of gastroenteritis ...