Intussusception: pseudokidney sign

Case contributed by A.Prof Frank Gaillard

Patient Data

Age: 3 years
Gender: Male

A 5.5 cm soft tissue mass is seen in the right abdomen. There are  mildly dilated loops of small bowel seen in the pelvis and right lower quadrant. Little air or stool is seen in the left colon. No free air or free identified. The osseous structures are unremarkable except for mild rightward splinting.


A 3.1 x 2.7 cm mass of intussuscepted bowel is seen in the right upper quadrant. The intussusception extends at least 4 cm, and appears to have several hypoechoic lymph nodes as its lead point. Mild bowel wall thickening is seen in the region. No gross free fluid is seen

Case Discussion


Air reduction enema was performed in this patient with plain film and ultrasound findings consistent with intussusception

An 18F Foley catheter was placed per rectum. Contrast was injected into the balloon under fluoroscopic guidance. 

Under fluoroscopy, air was introduced by the Foley catheter and outlined the large soft tissue mass within the right upper quadrant. This was then pushed into the region of the ileocaecal valve into the small bowel by air reduction. 

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Case information

rID: 6505
Published: 4th Jul 2009
Last edited: 16th Jul 2018
Inclusion in quiz mode: Included

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