A bladder inflammatory pseudotumour is a nonneoplastic 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, haematuria, 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 pseudotumour remains unclear.
Inflammatory pseudotumours 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 pseudotumours demonstrate enhancement.
Enhancement may be ring-like secondary to cellular periphery with a necrotic centre.
Treatment and prognosis
Treatment may consist of surgery, a regimen of high-dose steroids, radiation therapy, or conservative management.