USG Quiz: A Child with Vomiting and Abdominal Pain

A 2 year and 1 month old child presented with repeated vomiting and colicky abdominal pain for 6 hours. Bowel opening the day before was normal. The patient did not have fever. Physical examination showed generalised abdominal tenderness. A longitudinal mass over right paraumbilical region was detected. Sonographic examination of the abdomen was performed (Figures 1a and 1b).