Upper urinary tract air: a benign finding indicating presence and degree of ureteral reflux.
Two cases are reported in which air refluxed from the bladder to the pelviocaliceal systems after voiding cystourethrography. We stress that this is a benign condition, which can indicate the presence and degree of ureteral reflux.
D000368:Aged; D000388:Air; D006801:Humans; D008297:Male; D008875:Middle Aged; D011859:Radiography; D014521:Urethra / Q000000981:diagnostic imaging; D014718:Vesico-Ureteral Reflux / Q000000981:diagnostic imaging*