Foveolar hyperplasia. Longitudinal sonogram of the pylorus is a 5-month-old girl on prostaglandin therapy. A, Thickened gastric mucosal and submucosal folds are seen filling the entire pyloric canal (between fat arrows) causing obstruction of gastric outflow. A = Antrum. B, More magnified view of the thickened mucosa demonstrates the polypoid thickening (skinny arrows).

Contexts in source publication

Context 1

... upper airway obstruction, or Helicobacter pylori infection. 4 On its own, PFH is a rare condition, but a recent study showed that PFH is relatively common in children with IHPS and can be the cause for postoperative vomiting. 5 So- nography demonstrates mucosal folds with polypoid thicken- ing that extend into the antrum lumen causing obstruction (Fig. 2). 6 In PFH, the pyloric muscle is not thickened as seen in IHPS. 4 Differentiation from pylorospasm can be made with dynamic imaging because again normal passage of gastric contents is ...

Context 2

... most common type of polyp in the pediatric pop- ulation is the isolated juvenile polyp that frequently oc- curs in the rectosigmoid colon. Peutz-Jeghers syndrome is much less common and presents with multiple hamartoma- tous polyps predominantly in the small bowel. These patients frequently present with an intussusception from a polyp lead point (Fig. 20). 38 ...

Context 3

... of ingested foreign materials that accumulate within the gastrointestinal tract. Trichobezoars (composed of hair) and phytobezoars (composed of fruit and vegetable fibers) are the most common. On ultrasound, a be- zoar is identified as an intraluminal mass with hyperechoic arclike (curved or ''inverted U'') surface and marked acoustic shadowing (Fig. 22). On color Doppler, the twinkling artifact, described behind highly reflecting structures and predomi- nantly used for evaluation of kidney stones, can be seen as a rapidly changing mixture of red and blue. 45 Associated signs of bowel obstruction may be noted. 46 ...

Context 4

... ultrasound, identification of a hyperechoic non- compressible mass just underneath the abdominal wall without evidence of vascularization can be seen (Fig. 23). The lesion is usually triangular and involves the inferior aspect of the right side of the omentum. 48 The finding of a normal appendix can be ...