What is Cereblon and how is it related to IMiDs?

What is Cereblon and how is it related to IMiDs?
What are the main classes of drugs used in myeloma?
What steroids are used in myeloma treatment, and why?
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?