Fish bone migration to the urinary bladder after rectosigmoid colon perforation

Figure 2 Follow up computed tomography image after the patient developed mechanical ileus. A: One month before the operation. Follow up computed tomography (CT) demonstrated a transitional zone at the distal ileum near the pelvic abscess, with small bowel dilatation; B: Seven day before the operation. Follow-up CT showed a linear, radiopaque lesion that was partially penetrated into the dome of the bladder.