Peer review has expired on this program. It is the viewer’s responsibility to determine the educational value of this historical content.Peer review has expired on this program. It is the viewer’s responsibility to determine the educational value of this historical content.Peer review has expired on this program. It is the viewer’s responsibility to determine the educational value of this historical content.Benign bone tumors, such as chondroblastoma, giant cell tumor, or aneurysmal bone cyst, require treatment by curettage of the lesion and packing of the cavity with bone grafts or bone cement. If the removal of pathological tissue at surgery is incomplete, the risk of local recurrence is high. To reduce the risk of local recurrence, it is crucial that the bone window be large enough to inspect the tumor cavity completely. This video presents an innovative minimally invasive technique for curettage and packing of benign bone tumors performed by a small bone window and endoscopic inspection of the tumor cavity with an arthroscope. In the video, we present a case of 15-year-old female with a chondroblastoma of the left distal femur treated by endoscopic curettage. With this technique, the curettage could be performed by small bone window, and the arthroscope allowed a complete curettage of tumor tissue. Full weight-bearing was permitted immediately after surgery, and at 1 month after surgery, the knee was pain free with full range of motion. At 1-year follow-up, there was no evidence of recurrence suggesting that endoscopic curettage using an arthroscope can be a promising new treatment for benign bone tumors.