(a). Plain radiograph of a 74-year-old woman. The radiograph reveals a pathologic fracture at the diaphysis of the left tibia due to an osteolytic lesion in the medullary cavity. (b). T1-weighted magnetic resonance image showing several tibial lesions that are eccentric, oval and associated with clinically significant cortical erosion. (c). T1-weighted magnetic resonance image demonstrating a hypointense lesion with endosteal scalloping of the tibia and cortical erosion.