Ossifying fibroma

Case contributed by Mohammad Taghi Niknejad
Diagnosis probable

Presentation

Work up for knee pain.

Patient Data

Age: 35 years
Gender: Female
x-ray
Frontal
Lateral
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Info

A cortical based intramedullary lesion at the distal metaphysis of the right femur. It shows small lucent core with sclerotic margin inferring ossifying fibroma. No cortical destruction is noted. 

mri
This study is a stack
Axial T2
fat sat
This study is a stack
Coronal PD
fat sat
This study is a stack
Sagittal
T1
This study is a stack
Sagittal
PD fat sat
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Info

Cortical based ossifying fibroma is seen in medial aspect of distal femoral metaphysis.
Grade I intra meniscal injury is seen in posterior horn-body junction of medial meniscus.
Mild joint effusion is detected.

Case Discussion

Ossifying fibromas are benign bone lesions that should be differentiated from non-ossifying fibromas and fibrous dysplasia.

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