title: [Echography of pyloric stenosis].
abstract: In order to assess the accuracy of ultrasonographic (US) criteria for the diagnosis of pyloric stenosis (PS), the record of 78 infants admitted to Hôpital Sainte-Justine with the clinical diagnosis of PS during the past year was reviewed. Fifty-eight patients had PS at laparatomy. Thirty-four of these had US with 30 true positives and four "doubtful" findings. Twenty-two had normal US. Two of these had PS, nine gastroesophageal reflux and five normal barium studies of the upper gastrointestinal tract (the last six were followed clinically and remained well). The following were criteria for US diagnosis of PS: pyloric anteroposterior diameter greater than or equal to 1.5 cm, length greater than or equal to 2 cm or a muscle thickness greater than or equal to 4 mm. This series contains no false positive US studies and two false negatives, for a positive predictive accuracy of 94% and a negative predictive accuracy of 100% when we measure the length greater than or equal to 2 cm or combine a length of less than or equal to 2 cm with a muscle thickness greater than or equal to 4 mm.
mesh_terms: D005260:Female; D005764:Gastroesophageal Reflux / Q000175:diagnosis; D006801:Humans; D006984:Hypertrophy; D007223:Infant; D008297:Male; D009132:Muscles / Q000473:pathology; D011707:Pyloric Stenosis / Q000175:diagnosis* / Q000473:pathology; D014463:Ultrasonography
vernacular_title: Echographie de la stenose du pylore.