To make a long story short 2 weeks ago we find out via x-ray my mom is missing a considerably large portion of bone in her femur. She's had an mri and is scheduled for a bone scan next tuesday (she's had breast cancer 3 yrs ago). Called dr today about mri and said that it does confirm that it is a portion of bone missing, however doesn't suspect cancer (he at first did). This was her cancer specialist, so he said she would need to continue with orthopedist to find out what is going on. We won't find out anything until next friday after the bone scan. She has an extreme amount of pain with this from hip down leg, not fully through but in hip, upper leg, and lower leg. Can barely lift up leg to take a step. This all started suddenly about 3 weeks ago. Does anyone have any thoughts as to what could be going on. Throw anything my way because right now I am stressing myself out so bad.