| Summary: | Giant cell tumor (GCT) or osteoclastoma is a benign, locally aggressive tumor with a tendency to recur. Involvement of the axial skeleton is very rare and majority of them are seen in the sacrum. The authors report a rare case of a 19-year-old female who presented with a C2 dens GCT with a pathological fracture and atlantoaxial dislocation. The patient was operated in two stages: first stage, with posterior instrumentation and stabilization followed by the second stage, tumor resection by anterior transoral approach. The residual tumor cavity was packed with autologous corticocancellous bone grafts. At a 5-year follow-up, computed tomography scan showed a C1-C2 fusion mass. There was no radiological or clinical evidence of tumor recurrence with the patient having good functional outcome without any neurological deficit.
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