How and when should PET scans be used? What do they show?

How and when should PET scans be used? What do they show?
What should I know about the use of x-ray skeletal survey in myeloma?
How often should individuals diagnosed with MGUS have their myeloma markers retested?
Do all lytic lesions start as a focal lesion?
Are there other things patients can do to ease bone pain?
What can be used to treat myeloma bone disease?
What percentage of myeloma patients develop bone disease?
Do bone strengtheners help ease bone pain? How often should they be administered?