Benign Bone Tumors
A 16-year-old boy presents with 6 months of progressive knee pain and a small effusion. The pain is activity-related and has not responded to rest. Examination reveals tenderness over the proximal tibia with mild joint effusion. Radiographs show a well-defined, eccentric lytic lesion in the proximal tibial epiphysis with a thin sclerotic rim and stippled calcifications within the lesion. The physis is still open. Regarding chondroblastoma:
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Chondroblastoma is a rare benign cartilaginous tumor that characteristically occurs in the EPIPHYSIS...
Radiographically, chondroblastoma appears as a well-defined, eccentric, lytic lesion in the epiphysi...
Chondroblastoma occurs in the metaphysis after skeletal maturity; it is the most common bone tumor; ...
Histologically, chondroblastoma shows chondroblasts (polygonal cells with grooved, coffee-bean nucle...
Treatment is intralesional curettage with adjuvant therapy (phenol, cryotherapy, cautery) and bone g...
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