Massive giant-cell tumor of pelviacetabulum

[2] It typically presents in adults between age of 20 to 50 with localized swelling and pain.

[4] Average size of the tumor in this region is 9.5 cm.

Radiotherapy has high rate of recurrence (44%) and risk of soft tissue sarcomas (12%).

Excision can be extralesional which achieves 90% local tumor control but poor functional outcome [7] or it can be intralesional which has 90% local recurrence rate with good functional outcome.

[8] Massive GCT of pelvis, which is static, not amenable to excision and presenting with mechanical symptoms, can be managed by de-bulking the portion of tumor responsible for mechanical symptoms.