Fig. 1

CT images of a patient with cancer in the left wall of the bladder (patient number 5)

Non-contrast (a) and contrast-enhanced arterial phase images (b) of CT scans indicated that the tumor (white arrow) located on left wall of bladder, the longest diameter of tumor was 8.1 cm before cryosurgery. One months after cryosurgery, non-contrast (c) and contrast-enhanced arterial phase images (d) of CT show the structure of the bladder wall remained intact and tumor (white arrow) inside and outside the bladder had no obviously enchancement. One year after cryosurgery, non-contrast (e) and contrast-enhanced arterial phase CT images (f) show the bladder (white arrow) contraction and no urinary filling. There was no obviously enchancement in the preserved bladder. Three year after cryosurgery, non-contrast (g) and contrast-enhanced arterial phase images (h) of CT show the bladder (white arrow) shrink further and no obviously enchancement in the shrinked bladder. No progression and local recurrence happened in this patient at the follow up time of 40 months