History of multiple myeloma in remission with distal femur lesion. Again seen is the moderate cortical thickening/irregularity, periosteal reaction, and endosteal scalloping of the distal femoral diaphysis previously visualized on radiographs and MRI. These findings are not significantly changed from prior examination.
Chronic periosteal reaction is consistent with known myeloma however on the basis of this imaging, one cannot exclude a metastasis of an unknown primary.