Ultrasound diagnosis of the small intestinal adenomyoma in children.

Abstract

Adenomyoma is an exceptionally rare hamartoma in the small intestine. Few data have been reported on the featuresof this rare disease. The aim of this study was to describe the ultrasound (US) characteristics of small intestinal adenomyomas.Material and methods: This retrospective study analyzed the clinical features and US data of 15 pediatric patients diagnosedas small intestinal adenomyomas in the age range between 1 day to 12 years in our hospital during 2014-2021. Theclinical manifestations of all the small intestinal adenomyomas were abdominal pain, vomiting or/and hemafecia. The smallintestinal adenomyoma usually acted as the lead point of secondary intussusception. They were identified in the ileum (n=11),jejunum (n=2), and Meckel's diverticulum (n=2). The diagnostic accuracy (the concordance rate between US diagnosis andpathological diagnosis) of small intestinal adenomyoma was 73.3%. The small intestinal adenomyoma had approximately1.0-3.0 cm, were typically located in the submucosal region, had the basal part wide and without a pedicle, and its boundarieswere clear. The mass protruded into the intestinal cavity, and showed oval hypoechoic polycystic echo nodules, containingmultiple small quasi-circular or irregular cysts of different sizes surrounded by solid hypoechoic mosaic areas. The colorDoppler US showed in the solid hypoechoic areas of the mass abundant or sparse blood flow signals.Conclusions The USfindings of small intestinal adenomyomas in children are characteristic, and US is valuable in the identification of intestinaladenomyomas in children.