A chondroid lesion is consider a rare bone tumor. This bone tumor happens through years as the victim gets older. The tumor forms in between the the bone, causing the bone to break against another bone. It cracks the bone almost in half. The tumor can be seen in an x-ray and can determine the about of damage it can cause. The lesion is caused by the growth of the tumor, so catching the tumor before the growth will help stop the lesion from happening.