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DOI: 10.1148/radiol.2272020455
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Distinguishing Features of Self-limiting Adult Small-Bowel Intussusception Identified at CT1

Natalya Lvoff, MD, Richard S. Breiman, MD, Fergus V. Coakley, MD, Ying Lu, PhD and Robert S. Warren, MD

1 From the Departments of Radiology (N.L., R.S.B., F.V.C., Y.L.) and Surgery (R.S.W.), University of California San Francisco, Box 0628, M-372, 505 Parnassus Ave, San Francisco, CA 94143-0628. Received April 23, 2002; revision requested July 8; revision received July 17; accepted August 28. Address correspondence to F.V.C. (e-mail: fergus.coakley@radiology.ucsf.edu).



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  		Figure 1a. (a) Transverse contrast material-enhanced CT section in a 29-year-old man with nausea and vomiting due to a small-bowel intussusception shows the characteristic appearance of bowel within bowel (arrow). (b) Transverse contrast-enhanced CT section at a more inferior level than a shows a fatty mass (*) at the head of the intussusception. Findings at surgery confirmed the presence of intussusception due to a lead-point lipoma.

 


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  		Figure 1b. (a) Transverse contrast material-enhanced CT section in a 29-year-old man with nausea and vomiting due to a small-bowel intussusception shows the characteristic appearance of bowel within bowel (arrow). (b) Transverse contrast-enhanced CT section at a more inferior level than a shows a fatty mass (*) at the head of the intussusception. Findings at surgery confirmed the presence of intussusception due to a lead-point lipoma.

 


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  		Figure 2a. (a) Transverse contrast-enhanced CT scan in a 49-year-old woman with vague abdominal pain shows a small-bowel intussusception (arrow). (b) Transverse contrast-enhanced CT scan obtained later during the same examination as a shows that the intussusception has spontaneously resolved. This finding is consistent with a transient and self-limiting small-bowel intussusception.

 


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  		Figure 2b. (a) Transverse contrast-enhanced CT scan in a 49-year-old woman with vague abdominal pain shows a small-bowel intussusception (arrow). (b) Transverse contrast-enhanced CT scan obtained later during the same examination as a shows that the intussusception has spontaneously resolved. This finding is consistent with a transient and self-limiting small-bowel intussusception.

 


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  		Figure 3. Length of intussusception in surgical and self-limiting cases, as measured by readers 1 and 2. All surgical cases of intussusception had a length greater than 3.5 cm, as measured by either reader.

 




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