Multiple Myeloma, from the CureRays guide library.

Multiple myeloma is a cancer of plasma cells in the bone marrow; modern medicines control it for many years, and targeted radiation is highly effective for relieving bone pain.

What it is.

Multiple myeloma is a cancer of plasma cells — the immune cells in the bone marrow that normally make antibodies to fight infection. In myeloma, abnormal plasma cells multiply, crowd the marrow, weaken the bones, and produce a faulty protein that can harm the kidneys. Because it involves the marrow throughout the body, myeloma is treated with medicines rather than surgery, and it tends to be a long-term, manageable disease: while not usually curable today, it can be controlled for many years through periods of remission and treatment. Radiation has a valued, focused role — it is one of the fastest, most effective ways to relieve pain from a bone lesion or to strengthen a bone at risk of fracture.

How radiation treats it.

Radiation uses focused high-energy x-rays to damage the DNA of myeloma cells so they stop growing and the lesion shrinks. Myeloma cells are quite sensitive to radiation, which is why even modest, well-tolerated doses can relieve bone pain quickly — often within days to a couple of weeks. Advanced planning concentrates the dose on the affected bone while sparing the marrow elsewhere and nearby organs. Treatments are painless and brief, given over a small number of sessions. Side effects are usually mild and depend on the area treated, such as temporary fatigue or local skin or digestive changes that settle afterward.

The ways we can treat it.

Palliative bone radiation. A few precise, low-dose treatments to a painful bone lesion relieve pain quickly and effectively — often one of the most reliable ways to restore comfort in myeloma.

Radiation for solitary plasmacytoma. A single plasma-cell tumor in bone or soft tissue is often treated with radiation alone, which can control it long-term and sometimes cure it.

Emergency / stabilizing radiation. Used urgently to relieve spinal-cord compression from a vertebral lesion, or to strengthen a bone at high risk of breaking, protecting mobility and function.

Questions we hear often.

Can multiple myeloma be cured? For most people it is not yet considered curable, but it is very treatable — modern drug combinations and transplant control it for many years, often through repeated remissions, and new immune therapies keep extending that. A solitary plasmacytoma can sometimes be cured with radiation.

Why would I need radiation if myeloma is everywhere in the marrow? Medicines treat the disease throughout the body, but radiation is unmatched for a specific job — quickly relieving pain from a particular bone lesion, treating a single plasmacytoma, or stabilizing a bone or the spine. It complements, rather than replaces, drug therapy.

How fast does radiation relieve bone pain? Often quite quickly — many people notice meaningful pain relief within days to a couple of weeks of starting a short course of focused radiation, which can also reduce the need for pain medication.

This guide is informational only. It is not medical advice — please confirm anything here with your care team.