PMC3963349_01
Postcontrasted CT image revealing an irregular thickening of the left side of the bladder wall (arrowheads) and a stranding of a surrounding fat tissue (arrows)
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F1
Pre- and postcontrasted CT images revealed an irregular thickening of the left side of the bladder wall and an increased density of a surrounding fat tissue [Figure 1].
(a) On axial T1-weighted image, the irregular thickening of the bladder wall showing isointensity (arrowheads), and the stranding of a surrounding fat tissue is also seen (arrows) (b) On coronal T2-weighted image, the irregular thickening of the wall showing hypointensity (arrowheads). The stranding of a surrounding fat tissue is seen (arrows). The obliteration of the normal hypointensity of the muscle layer adjacent to the mass is also seen (c) The irregular thickening of the bladder wall showing a gradual and inhomogeneous enhancement (arrowheads) on equilibrium phase of the dynamic contrast study. The stranding of a surrounding fat tissue is also seen (arrows) (d) The both the irregular thickening of the bladder wall and the stranding of a surrounding adipose tissue was nearly disappeared on MR image without any treatment after three months
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F2
The irregular wall thickening showed isointensity relative to the bladder wall on T1-weighted images [Figure 2a], and inhomogeneous hypointensity on T2-weighted images [Figure 2b], and gradual and inhomogeneous enhancement were seen on dynamic contrast study [Figure 2c]. In addition, there was obliteration of the normal hypointensity of the muscle layer of the bladder wall on T2-weighted images [Figure 2b]. T1- and T2-weighted images including dynamic contrast study showed a stranding of perivesical fat [Figure 2a and b], which suggested the perivesical fat invasion. The results of urine cytology showed no malignancy.
Pathological figures with low (a) and high (b) magnification showing a polypoid or papillary appearance of the mucosa, an edematous change, neutrophil invasion, and granulomatous formation. The patient is diagnosed as a polypoid and papillary cystitis
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F3
Pathologic examination revealed a polypoid or papillary appearance of the mucosa, with submucosal edematous changes, neutrophil invasions, and granulomatous formations [Figure 3a and b].