Brachytherapy is a form of localized radiation given over a short period of time in the immediate post-operative period. Small hollow plastic tubes called "brachycatheters" are placed at the time of surgical resection over areas where very focal radiation is desired. After allowing a few days for healing, radiation therapy is given through these catheters as 1-2 treatments per day over 3-5 days (as opposed to weeks). Once the brachytherapy is completed, the catheters are simply removed at the bedside. This technique is frequently used for recurrent tumors in the setting of previous radiation or for known close margins at the time of the original resection.