Unique Application of K-Y Jelly in Cryotherapy for Giant Cell Tumors of the Distal Femur - A Case Report

GCTs are a locally aggressive tumor that can result in significant pain and dysfunction through the disruption of bony and nearby soft tissue architecture. Although generally benign, these tumors have been shown to have 1-9% chance of metastasis and a local recurrence rate of up to 65%. For these reasons, appropriate treatment is essential to remove primary lesions as well as reduce the odds of metastatic disease and lower recurrence rates. Cryosurgery is a welldescribed technique used to achieve local control of primary GCTs. Modern cryoablation utilizes a cryoprobe to freeze surrounding tissues via release of a thermal conducting gas (argonhelium). The optimal technique for eradication of GCT is a widely debated topic rooted in rates of complications and tumor recurrence. Herein, we describe a case report of a 30-year-old female with a large distal femoral GCT that underwent intralesional curettage and adjunctive cryotherapy utilizing K-Y jelly as a semi-solid medium to transmit the freeze zone more evenly within the cavity. Following cryoablation, the cavity was filled with antibiotic loaded polymethyl methacrylate cement. This technique has scarcely been described in the literature and warrants further investigation.