Method for treating urinary reflux

A method for treating vesicoureteral reflux in a mammal, which method comprises delivering a composition comprising a water insoluble biocompatible polymer, a water insoluble contrast agent and a biocompatible solvent to the subureteral region of the mammal

• wherein said delivery is conducted under conditions such that a polymer precipitate forms in situ in the subureteral region thereby reducing the vesicoureteral reflux in the mammal.

A method for the delivery of a composition comprising a water insoluble biocompatible polymer, a biocompatible solvent, and a water insoluble contrast agent to the subureteral tissue of the mammal which tissue already has deposited therein with an initial amount of this composition which method comprises

• visualizing the position of the deposited composition in the subureteral tissue
• delivering a composition comprising a biocompatible polymer, a biocompatible solvent, and a contrast agent to the subureteral tissue of the mammal containing said deposited composition
• wherein said delivery is conducted under conditions such that additional polymer precipitate forms in situ in the subureteral tissue thereby further reducing vesicoureteral reflux in the mammal.