A catheter assembly includes an elongate main catheter branch and an elongate side catheter branch. The main catheter branch includes an arc shape and an inflatable balloon extending along a portion of the arc. The side catheter branch extends along the main catheter branch within a plane of the curvature of the arc of the main catheter branch. A stent can be positioned along the inflatable balloon. The stent includes a lateral branch opening through which the side catheter branch extends.
