2021 Volume 34 Issue 2 Pages 153-158
Infantile hemangioma is common in childhood, but rarely occurs in the urinary bladder. Most cases of childhood bladder hemangioma are cavernous hemangioma, and infantile hemangioma in the urinary bladder is rare. A 7-year-old boy was examined for gross hematuria following an injury to the buttocks. Abdominal ultrasound revealed no abnormalities other than Society of Fetal Urology (SFU) grade 1 left hydronephrosis, and the hematuria resolved after 5 days. Eleven months later, gross hematuria reappeared, and ultrasound and computed tomography (CT) scans revealed not only left lower ureteral dilation and SFU grade 2 left hydronephrosis but also a mass (maximum diameter 18 mm) around the left ureteral orifice within the urinary bladder. Cystoscopy was therefore performed, and a submucosal mass around the left ureteral orifice was identified and resected. Pathological testing showed that the vascular endothelium within the mass was glucose transporter 1-positive, and infantile hemangioma was diagnosed. Ultrasound is useful for the detection of hemangioma in the urinary bladder, but the difficulty of obtaining a sufficiently distended bladder to enable bladder observation in children means that it may have to be repeated several times.
