If the biopsy shows that you have multiple myeloma, your doctor needs to know the extent (stage) of the disease to plan the best treatment. Staging may involve having more tests. You may have blood tests (including beta-2-microglobulin), CT scans, or an MRI of your bones.

Doctors may describe the disease as Stage I, Stage II, or Stage III. Higher numbers mean that a larger number of myeloma cells are in the body. The stage also takes into account whether the cancer is causing problems with your bones or kidneys.

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