Case 10
Clinical History:
        A seven-year-old boy had had a mass in the left lower quadrant of his abdomen, which had appeared and then disappeared several times in the two previous months. Sometimes he had bloody mucous stools. He had had severe abdominal pain for 4 days before admission. Here are his plain abdominal film, ultrasonograms, and barium study.
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Figure 1. Plain abdominal film
 
 
Figures 2 and 3. Longitudinal and transverse abdominal ultrasonograms
 
 
Figures 4 and 5. Barium enema: right lateral decubitus position and supine
position of the rectosigmoid area

What is your diagnosis?
 
 

ANSWER