(a)
(b)
Figure 4: (a) Catheter balloon inflation with only 1–3 cc of air or fluid is associated with balloon inflation well beyond the normal caliber of the normal fossa navicularis. (b) Repeat RUG demonstrating, in addition to the previously seen bulbar stricture, a new fossa navicularis stricture that developed after a RUG was performed using fossa balloon inflation technique.