Giant cell tumour of bones is an unusual neoplasm that accounts for 4% of all primary tumours of bone, and it represents about 10% of malignant primary bone tumours with its different grades from borderline to high grade malignancy. GCT generally occurs in skeletally mature individuals with its peak incidence in third decade of life. Distal femur and proximal tibia are the commonest sites followed by distal radius. Less than 4% of these tumours are known to affect the ankle joints. But, its biological behaviour at this rare location is quite unpredictable.
Case Summary: 24 years old male presented with history of nontraumatic pain of left knee since 2 years. Patient was initially evaluated from peripheral hospital with x rays and MRI. It showed a well-defined osteolytic lesion in the epiphysis involving the metaphysical bone of right fibular head without intra-articular extension.
Conclusion: In cases of GCT, the management depends upon the various factors such as site, age, involvement of the bone, extent of bone involvement and whether there is articular involvement or not. Extra-articular GCT can be managed with extended intralesional curettage. However, in the proximal fibula, total en bloc excision of the tumor is the treatment of choice.