Bladder inflammatory pseudotumor is a non-neoplastic proliferation of cells.
This entity is more common in adults, with a mean age at diagnosis of 38 years.
Patients present most commonly with an ulcerating bleeding mass, hematuria, and voiding symptoms.
Although not neoplastic, the lesions can be locally aggressive and may mimic malignancy clinically, at cystoscopy, and at imaging.
The pathogenesis of inflammatory pseudotumor remains unclear.
Inflammatory pseudotumors usually appear as a solitary bladder mass, which may be exophytic or polypoid. Ulceration may also be evident.
CT and MRI
On CT and MR images, inflammatory pseudotumors demonstrate enhancement.
Enhancement may be ring-like secondary to the cellular periphery with a necrotic center.
Treatment and prognosis
Treatment may consist of surgery, a regimen of high-dose steroids, radiation therapy, or conservative management.