Obstructive lower urinary tract symptoms due to ball valve effect of a rare bladder tumor in an adolescent male

Cystitis glandularis is a rare inflammatory proliferative disease of urinary bladder. It is commonly associated with chronic bladder outlet obstruction and persistent bladder irritation. It is rarely reported in pediatric population and usually presents with hematuria and lower urinary tract symptoms. Radiological imaging cannot positively differentiate it from more sinister pathologies like bladder malignancies. We report a rare case of bladder outlet obstruction in an adolescent boy caused by the ball-vale effect of a long pedunculated bladder polyp. The case was managed with transurethral resection and histopathology was consistent with cystitis glandularis.