An unexpected cause of weight loss in a teenaged girl.

Chronic abdominal symptoms, especially in conjunction with risk factors such as iron deficiency anaemia, necessitate consideration of pica. Bowel wall thickening, either on ultrasound or computed tomography, may be a sign of a retained foreign body. An abdominal ultrasound shows abdominal ascites with dilated bowel loops and wall thickening. [Extracted from the article]