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Clear-cell chondrosarcoma: a report of five cases including ultrastructural study
Cancer
|August 1, 1979
Summary
This study reports on five cases of clear-cell chondrosarcoma, a rare bone tumor. These tumors, often appearing benign on X-rays, require en bloc resection and joint replacement for effective treatment.
Area of Science:
- Orthopedic Oncology
- Skeletal Radiology
- Surgical Pathology
Background:
- Chondrosarcoma is a malignant tumor arising from cartilage-forming cells.
- The clear-cell variant is a rare subtype with distinct histological features.
Observation:
- Five cases of clear-cell chondrosarcoma occurred in the epiphyseal region of long bones, frequently the femoral head.
- Radiographically, these lesions appeared well-defined and benign, showing either purely lytic or mixed lytic and dense features.
- Histologically, tumors comprised sheets of clear cells with abundant glycogen, lacking significant chondroid matrix, but containing areas of conventional chondrosarcoma.
Findings:
- Electron microscopy confirmed clear cells possess features typical of chondroid cells, including microvilli, glycogen, and Golgi complexes.
- Despite being true chondrosarcomas, these tumors exhibited a slow growth rate in the observed cases.
Implications:
- En bloc resection with joint replacement is recommended as the optimal treatment strategy.
- Understanding the distinct histological and radiological features is crucial for accurate diagnosis and management of this rare chondrosarcoma variant.