What causes bone pain in Multiple Myeloma and how is it treated

Bone Pain in Multiple Myeloma: Causes and Treatment

Why Bone Pain Happens in Multiple Myeloma

Bone pain is one of the most common symptoms of multiple myeloma—often affecting the back, ribs, and pelvis. Here's what's happening in your bones:

The Root Cause: Myeloma cells build up in your bone marrow and release substances that activate special cells called osteoclasts. These cells break down bone tissue faster than your body can rebuild it. This creates several problems:

• Lytic lesions (holes or damage in the bones) that weaken bone structure
• Osteoporosis (overall thinning and weakening of bones)
• Bone fractures that can occur even from minor injuries
• Spinal compression when damaged vertebrae collapse

According to the NCCN Guidelines for Multiple Myeloma, bone damage develops in about 85% of patients with myeloma, and these bone-related complications are a major cause of reduced quality of life.

How Bone Pain is Treated

Treatment focuses on two main goals: stopping bone damage and relieving pain.

1. Bone-Protecting Medications (Most Important)

According to NCCN Guidelines, all patients receiving primary myeloma treatment should receive bone-targeting therapy. You have two main options:

Bisphosphonates (Category 1 recommendation):

• Zoledronic acid (Zometa) - given as an IV infusion
• Pamidronate (Aredia) - given as an IV infusion
• How they work: These medications slow down bone breakdown and help reduce pain and fractures
• Dosing: Usually given monthly, though every 3 months may be equally effective for some patients

Denosumab (Xgeva):

• Given as an injection under the skin every 4 weeks
• Works differently than bisphosphonates by blocking bone-destroying cells
• Preferred choice if you have kidney problems, since bisphosphonates can stress the kidneys
• Research shows denosumab and zoledronic acid are similarly effective at preventing fractures

Duration: According to NCCN Guidelines, bone-targeting treatment typically continues for up to 2 years. Whether to continue beyond 2 years depends on your individual situation and how you're responding.

2. Pain Management

• Radiation therapy to specific areas of bone pain
• Over-the-counter or prescription pain medications as needed
• Supportive care to manage symptoms

3. Surgical Interventions (When Needed)

For serious complications:

• Vertebroplasty or kyphoplasty for painful spine fractures (injecting cement to stabilize vertebrae)
• Orthopedic surgery if you have fractures in long bones or spinal cord compression

Important Dental Consideration

⚠️ Before starting bisphosphonates or denosumab, you should have a baseline dental exam. These medications can rarely cause osteonecrosis of the jaw (ONJ)—a condition where jawbone tissue breaks down. This is uncommon but serious, so:

• Get a dental checkup before starting treatment
• Maintain good dental hygiene during treatment
• Tell your dentist you're on these medications
• Report any jaw pain or dental problems immediately

Questions to Ask Your Care Team

1. Which bone-protecting medication is best for my situation—bisphosphonates or denosumab?
2. How often will I receive these medications, and for how long?
3. What pain management options are available if I have breakthrough pain?
4. Do I need imaging (PET/CT or low-dose CT) to monitor my bone lesions?
5. Should I take vitamin D supplements, and what's my vitamin D status?
6. When should I have my dental exam, and how often during treatment?

---

This information is for educational purposes only. Always consult your healthcare team for personalized medical advice and decisions.