Learning objectives
To present a description of bone tumors that most frequently arise around the knee,
with main interest to the imaging findings.
Background
Primary tumors of bone are relatively uncommon,
but a significant proportion of cases arise around the knee.
It is likely that the distal femur and proximal tibia and fibula are common sites of bone tumor location because they are highly vascularized areas,
with very active physes.
The patella,
however,
is only rarely affected.
Bone tumors around the knee occur in those ages when the skeleton is in growth phase and especially in a range between 5 and 20 years,
with the exception of the giant...
Imaging findings OR Procedure Details
Almost all bone tumors may be found around the knee.
Among benign bone tumors,
between 30 and 35% of chondroblastomas,
50% of osteochondromas and 60% of giant cell tumors affect this region.
A high percentage of nonossifying fibromas is located at the distal end of the femur,
up to 90% in some series.
Aneurysmal bone cysts have a predilection for the proximal tibia.
Of malignant primary bone tumors,
50% of osteosarcomas arise here but only 12–15% of chondrosarcomas.
Plain film radiography,
computed tomography and magnetic...
Conclusion
The study of bone tumors is a challenge.
The radiologist should be aware of the radiological features of the tumors around the knee,
in order to propose differential diagnosis and resulting in an appropriate clinical assessment.
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