PMC5412139_01
Radiographs of the knee joint 8 weeks after the first symptoms. A hypodense area is visible at the upper pole of the patella.
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fig1
For further diagnostics, another radiograph and a subsequent MRI of the left knee were performed showing an osteolytic lesion with a diameter of 1.5 cm of the patella with central necrosis (Figures 1 and 2).
MRI showing a sharply limited enhancement of the patella. The radiologist suspected a chondroblastoma.
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fig2
For further diagnostics, another radiograph and a subsequent MRI of the left knee were performed showing an osteolytic lesion with a diameter of 1.5 cm of the patella with central necrosis (Figures 1 and 2).
CT of the left knee clearly showing an osteolytic process with sharp borders.
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fig3
A CT scan revealed a 2.0 x 1.1 x 1.0 cm osteolytic lesion of the patella associated with a destruction of the ventral corticalis (Figure 3).
Follow-up radiographs 17 months after surgery revealing an almost normally appearing patella.
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Radiographs showed a nearly full osseous recovery of the patella (Figure 4).