MRI results: decreased T1 signal with loss of the normal fatty marrow signal intensity throughout the clivus, calvarium, and vertebral bodies, this finding is nonspecific and consistent with a diffuse marrow replacement process and may be seen with anemia, smoking, or drug therapies with other etiologies not excluded. I have not been diagnosed as anemic; never smoked, and drug therapies have included cholestrol medicine, and thyroid replacement hormone. What does this mean?