title: Macroscopic Hematuria and a Bladder Mass: Eosinophilic Cystitis in a 7-Year-Old Boy.
abstract: We report a case of eosinophilic cystitis in a 7-year-old boy with a history of atopic symptoms, with focus on the radiological findings. He presented with hematuria and dysuria and ultrasonography (US) showed irregular bladder wall thickening resembling a bladder mass. CT urography did not characterize the lesion any further and showed no local or distant spread. Biopsies revealed eosinophilic cystitis, a benign inflammatory condition. We found that US characterized the lesion at least as well as CT and should be the first choice of imaging. When staging is considered before biopsy, MRI should be preferred to CT. There are no specific radiological signs of eosinophilic cystitis. On follow-up, US was a safe, cost-effective imaging modality, but findings should be interpreted in a clinical context. In a child with hematuria and a bladder mass, eosinophilic cystitis is a relevant but rare differential diagnosis, especially when there is a known atopic history.
authors.affiliation: Department of Radiology, Lillebaelt Hospital, Skovvangen 2-8, 6000 Kolding, Denmark.
authors.forename: Stine Bjerrum
authors.initials: SB
authors.lastname: Runge
authors.affiliation: Institute of Pathology, Aarhus University Hospital, 8000 Aarhus C, Denmark.
authors.forename: Søren
authors.initials: S
authors.lastname: Høyer
authors.affiliation: Pediatric Department, Lillebaelt Hospital, 6000 Kolding, Denmark.
authors.forename: Louise
authors.initials: L
authors.lastname: Winding