CPT® Code 27358

Add-On Code

Excision or curettage of bone cyst or benign tumor of femur; with internal fixation (List in addition to code for primary procedure)

The CPT® Code 27358 refers to the excision or curettage of a bone cyst or benign tumor located in the femur, accompanied by internal fixation. A bone cyst is defined as a fluid-filled cavity within the bone, which can vary in type. The unicameral or simple bone cyst is a common benign lesion, while the aneurysmal bone cyst is less common and characterized by vascular tissue surrounding a blood-filled cystic lesion. Additionally, benign bone tumors can include various forms such as giant cell tumors, chondromyxoid fibromas, and enchondromas. The procedure involves making an incision over the affected area of the femur, followed by dissection of the soft tissues to expose the bone. If a cystic lesion is identified, a window is created in the bone to access the cyst, allowing for fluid aspiration and laboratory analysis. The cyst lining is then removed through curettage, or the lesion may be excised along with a margin of healthy bone. Following these steps, internal fixation is performed to stabilize the femur, particularly if the defect is significant in size or location. This fixation is achieved using plates, screws, or other devices to prevent potential fractures and to secure any bone grafts that may have been placed during the procedure.