Recognize how radiographie images reflect the under-lying pathologie process in osseous tumors.

Identify the radiographie features of a biologically aggressive process.

In gênerai, the biological aggressiveness of an osseous lésion is reflected by its rate of growth.

Lésion margin and periosteal reaction are indicators of lésion growth rate.

Mineralized matrix, when présent, is the key to the underlying osseous histology.

Biopsy should be directed to the most biologically active portion of a lésion, to ensure that the sample accurately depicts the grade of the underlying lésion.

This session is a review of the fundamental analysis of the solitary lésion of bone, emphasizing the importance of margin, periosteal reaction and matrix in establishing a diagnosis or differential diagnosis. It also correlates biological aggressiveness with radio-logical imaging, emphasizing radiologie-pathologie corrélation. The session will also review the standard classifications and how they can be used in establishing differential diagnoses.