Giant Cell Tumor (GCT) is a benign aggressive tumor of skeletally mature individuals with incidence peaking in third decade of life. In skeletally immature individuals giant cell tumor is extremely rare (<2%). More common in females and epi-metaphyseal location. Here we present a case of a four years old male child with pain and swelling proximal tibia left side, NCCT & MRI suggestive of giant cell tumor, was treated with excisional biopsy, curettage and void was filled with allograft, which was taken from mother’s iliac crest. Sample sent for histopathology was consistent with diagnosis of giant cell tumor. Patient started weight bearing after 2 months postoperatively. No recurrence has been seen after 6 months of follow up.

Keywords : Giant Cell Tumor, Proximal Tibia, Excisional Biopsy, Allograft.