J Radiol
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Three patients had colonic perforation as a result of percutaneous nephrostomy and lithotripsy. These patients did not respond to conservative measures and required surgery (colostomy, hemicolectomy, drainage). ⋯ Fluoroscopy and ultrasonography do not allow simple and accurate information of the position of the colon, and CT is the method of choice. Some factors seem of high risk : thin and young patient, female, dilated pelvo-calyceal system, associated colonic obstruction.