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February 1996

Pyloric Stenosis in Premature Infants

Author Affiliations

Department of Pediatric Surgery The Children's Hospital 1950 Ogden, HC 330 Denver, CO 80218
Ann Arbor, Mich

Arch Pediatr Adolesc Med. 1996;150(2):223-224. doi:10.1001/archpedi.1996.02170270105019

The diagnosis and treatment of pyloric stenosis in infants has been well established for many years.1 The incidence of pyloric stenosis in premature infants is unusual,1 the presentation is atypical,2-5 and the diagnosis delayed, if not difficult.2-5 Recently, four premature infants with pyloric stenosis demonstrated these features and underscored the limitations of ultrasonographic imaging in premature infants.5,6

Patient Reports.Patient 1. A premature male infant (weighing 2100 g at 35 weeks' gestation) with the onset of nonprojectile vomiting at 6 weeks of age was evaluated by ultrasound at 7 weeks of age. Ultrasound findings were normal (pyloric muscle thickness, 2.4 mm), and vomiting persisted. An upper gastrointestinal contrast study performed at 8 weeks of age confirmed pyloric stenosis.

Patient 2. A premature male infant (weighing 1610 g at 31 weeks' gestation) with the onset of nonbilious nonprojectile vomiting at 5 weeks of age was evaluated