. 9B is a plan view of the interior of the top case of the device, and FIG. 9C is a cross-sectional view of a portion of the top case. [0027] FIG. 10 is a perspective view of one embodiment of an implantable medical device that includes a catheter having drug-containing reservoirs at the distal end portion. [0028] FIG. 11A is a plan view of one embodiment of the distal end portion of a catheter ha