CPT® Code 21045

The procedure described by CPT® Code 21045 involves the excision of a malignant tumor located in the mandible, which is the lower jawbone. This surgical intervention is categorized as a radical resection, indicating that the procedure aims to remove not only the tumor itself but also a significant margin of surrounding healthy tissue to ensure that all cancerous cells are eliminated. The approach taken by the physician is intraoral, meaning that the surgery is performed through the mouth, allowing direct access to the tumor without external incisions on the face or neck. During the excision, the physician meticulously removes the tumor along with the margins of healthy tissue, ensuring that the area surrounding the tumor is free from any disease. Depending on the extent of the tumor and its location, the procedure may involve the removal of all or part of the mandible. In some cases, the removal of teeth may also be necessary to achieve complete excision. Following the tumor removal, reconstruction of the mandible may be required, which can involve the use of myocutaneous flaps, bone grafts, prosthetic devices, and rearrangement of tissue to restore function and aesthetics. The surgical site is then closed using layered sutures to promote proper healing and minimize scarring.