The images (AP and Lateral) demonstrate an osseous outgrowth at the medial posterior metaphysis of the distal femur.  Additional MRI images are shown.
        
                        image 1                                            image 2                                            image 3
 

    
                image 4                                                            image 5
 

Images 1 (coronal), 2 (axial), and 4 (sagital), are T1-weighted.  They demonstrate an osseous lesion that extends from the metaphysis and extends away from the joint space.  The marrow cavity is continuous from the femur into the lesion.  The cortex is uninterupted.  Images 3 (axial), and 5 (coronal) are FSE fat-suppressed T2-weighted images.  They again show that the lesion appears continuous with the femur marrow and cortex.  These images also demonstrate a bright cartilagenous cap (yellow arrows).  These findings are consistant with a benign osteochondroma.
                                                       
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