Giant cell tumor of bone.

Area of Science:

• Orthopedic Oncology
• Skeletal Tumors
• Bone Pathology

Background:

• Giant cell tumor (GCT) of bone presents significant management challenges due to unpredictable recurrence and metastatic potential.
• Current clinical, radiographic, and histologic parameters do not reliably predict individual lesion behavior.

Purpose of the Study:

• To review and clarify the management strategies for giant cell tumors of bone.
• To correlate treatment outcomes with tumor staging and surgical techniques.

Main Methods:

• Review of Enneking's and Campanacci's radiographic and surgical staging systems for GCT.
• Analysis of treatment outcomes based on surgical modalities including curettage, bone grafting, polymethyl methacrylate (PMMA) instillation, liquid nitrogen cryotherapy, and en bloc resection.
• Evaluation of radiation therapy's role in specific GCT locations.

Main Results:

• Curettage with bone grafting or PMMA shows 70-80% success for Stage 1 and many Stage 2 lesions, preserving joint function.
• En bloc resection is preferred for expendable bones and is reserved for Stage 3 and selected Stage 2 lesions, despite associated complications and functional limitations.
• Liquid nitrogen cryotherapy reduces recurrence but carries risks of complications and late fractures.
• Radiation therapy is indicated for unresectable spinal or sacral GCTs, with vigilance for secondary sarcomas.

Conclusions:

• The success of curettage for GCTs is dependent on appropriate application to early-stage lesions.
• Surgical staging is crucial for selecting the optimal treatment modality to balance tumor eradication and joint preservation.
• Management of GCTs requires specialized expertise and should be centralized in experienced institutions.