CPT® Code 27356

The CPT® Code 27356 refers to the excision or curettage of a bone cyst or benign tumor located in the femur, specifically when this procedure is accompanied by the use of an allograft. A bone cyst is defined as a fluid-filled cavity within the bone, which can vary in type and presentation. One of the most common forms is the unicameral or simple bone cyst, recognized as a benign lesion that typically does not pose significant health risks. Another type, the aneurysmal bone cyst, is characterized by a vascular structure surrounding a blood-filled cystic lesion. In addition to cysts, there are various benign bone tumors, such as giant cell tumors, chondromyxoid fibromas, and enchondromas, which may necessitate surgical intervention. The procedure begins with an incision made over the affected area of the femur, allowing access to the underlying soft tissues. These tissues are carefully dissected to expose the femur, where the presence of a cystic lesion may require the creation of a window in the bone. This window allows for the aspiration of fluid, which is then sent for laboratory analysis. The next step involves the use of a curette to remove the lining of the cystic cavity completely. Alternatively, if a benign tumor is present, the lesion is excised along with a margin of healthy bone to ensure complete removal. In the case of CPT® Code 27356, after the lesion has been either curetted or excised, the resulting defect in the bone is filled with donor bone tissue, known as an allograft. This allograft serves to promote healing and restore structural integrity to the femur. The procedure is critical for addressing both the immediate concerns of the cyst or tumor and the long-term health of the bone, ensuring that the area is adequately supported during the recovery process.