[Infantile hypertrophic pyloric stenosis. 22 years' data].

The report is a retrospective study of the journals of 123 patients operated from 1967-89. In all patients, the Fredet-Ramstedt pyloromyotomy was used. The incidence of pyloric stenosis is stable in Tromsø, 1.5 +/- 1 pr. 1,000 newborn. The incidence among boys and girls is 4:1. Serious complications after surgical treatment are infrequent; with no mortality and 4% reoperations. The duration of symptoms significantly increased the incidence of peroperative pyloric perforations, with a more tedious postoperative course. Early diagnosis and surgical treatment are therefore recommended.