Case 1

This is an ultrasound study showing a thickened gastric pylorus which demonstrates a target appearance in transverse section. The muscular layer of the wall is hypoechoic. The walls are thickened, measuring 4mm circumferentially. The length of the pylorus is 19mm, and the transverse thickness is approximately 13mm.

 These findings represent congenital thickening of the pyloric muscle, which supports a diagnosis of congenital hypertrophic pyloric stenosis.

I would contact the referring physician and suggest referral to paediatric surgery; the usual management is surgical.