The short answer
Some people without symptoms may be observed. When treatment is needed, options for indolent non-Hodgkin lymphoma can include targeted therapy, antibody treatment, chemotherapy combinations, or clinical trials. The most useful conversation starts with the goal of treatment and the exact disease features driving the recommendation.
Ask the team to name the goal of treatment.
Understand which diagnosis details drive the recommendation.
Ask about benefits, risks, sequence, and alternatives.
Rare-cancer expertise and clinical trials may be worth discussing.
On this page
Choose how you want to read this
The whole article, with every detail and caution.
The short answer
Waldenström macroglobulinemia is a slow-growing blood cancer. Doctors also call it lymphoplasmacytic lymphoma. It causes your body to make too much of an antibody called IgM. Extra IgM can thicken your blood plasma. This problem is called hyperviscosity. Not everyone needs treatment right away. When treatment is needed, several drug options exist. How urgently you need care can depend on your specific symptoms.
Watchful waiting when you have no symptoms
Say you are diagnosed but have no symptoms yet. Your team may recommend watchful waiting instead of starting treatment right away. This means regular monitoring, with blood tests, but no drugs given yet. This is not a way of avoiding care. NCI describes it as close monitoring until signs or symptoms appear or change. Ask your team what specific changes would prompt starting treatment.
Hyperviscosity: why thick blood plasma is treated urgently
High IgM levels can make your blood plasma thick. This slows normal blood flow. It can cause trouble seeing or hearing, heart problems, shortness of breath, headache, dizziness, and numbness or tingling of the hands and feet. These symptoms are not something to wait out. Plasmapheresis is a procedure that filters your blood. It removes the excess antibody-thickened plasma. It replaces this with donor plasma or a substitute fluid. It does not stop new antibodies from forming, so other treatment is still needed.
Chemotherapy and targeted therapy
When treatment is needed, options include standard chemotherapy drugs and targeted therapy. Which specific combination fits you depends on your symptoms, your overall health, and how your particular disease is behaving. Ask your team to walk you through why they are recommending a specific drug or combination for you. This disease has more than one reasonable treatment path.
Side effects worth planning for
Chemotherapy commonly causes fatigue and a temporary drop in blood counts. This raises infection risk. Targeted therapies have their own side effect patterns. These differ from standard chemotherapy. Ask your team specifically what to expect from your regimen, and from plasmapheresis if you need it.
Why this disease often means a long relationship with your care team
This is a slow-growing lymphoma. NCI notes that lymphoma can come back after treatment, so follow-up often goes on for a long time. Ask your team what your realistic long-term picture looks like. This shapes how you plan around treatment and monitoring.
Which symptoms cannot wait
Call 911 or go to an emergency department for chest pain, significant shortness of breath, a sudden severe headache, new confusion, or sudden loss of vision or hearing. These can signal hyperviscosity or another urgent complication, and they are emergencies rather than same-day calls. Do not drive yourself.
A temperature of 100.4°F (38°C) or higher belongs in its own tier while you are being treated. CDC calls a fever during chemotherapy a medical emergency and says to call your doctor immediately. Ring your care team the minute you see that reading, day or night. If you cannot get hold of them quickly, go to an emergency department and tell them straight away that you are having chemotherapy or other cancer treatment.
Call your care team right away for new or worsening numbness or tingling, dizziness, or unexplained bleeding such as nosebleeds or bleeding gums. For emergencies, call 911 or go to the ER.
What to ask your care team
- Do I need treatment now, or is watchful waiting appropriate for me?
- What is my IgM level, and does it put me at risk for hyperviscosity symptoms?
- Which treatment combination are you recommending, and why?
- What symptoms should prompt a right-away or emergency call?
Sources
- National Cancer Institute — Adult Non-Hodgkin Lymphoma Treatment (PDQ)
- CDC — Fever and Cancer Treatment, accessed August 13, 2026
Common questions
What treatments might be discussed?
Some people without symptoms may be observed. When treatment is needed, options for indolent non-Hodgkin lymphoma can include targeted therapy, antibody treatment, chemotherapy combinations, or clinical trials.
Why can plans differ?
Plans can differ because Waldenström macroglobulinemia may vary by subtype, extent, symptoms, test results, and the person's overall health and goals.
Should I ask about a clinical trial?
Yes. Asking does not commit you to join. The team can explain whether a study fits the diagnosis, timing, location, and goals.
What should I know before agreeing?
Ask about the goal, likely benefits, important risks, alternatives, schedule, monitoring, practical costs, and what happens if the treatment does not work or is hard to tolerate.
Questions to ask your doctor
Being prepared helps you get the most out of your appointments. Save or print these questions.
Tap a question to save it to your list (kept on this device).
Your next step
Turn this guide into a short list for your care team.
Talk with a trained specialist or navigator
Cancer Explained provides educational guidance, but does not replace trained specialists, social workers, or your medical team.
Talk to a trained cancer information specialist
Free, confidential assistance from NCI Cancer Information Service via phone, chat, or email.
Contact your oncology team
Locate after-hours contact numbers, portal messages, or urgent triage phone lines.
Find a patient navigator
Get one-on-one help with appointments, logistics, translation, and care coordination.
Find a genetic counselor
Discuss inherited mutation risk, family history, and genetic testing options.
Find an oncology social worker
Access emotional counseling, family support groups, and mental health resources.
Find a financial navigator
Locate copay assistance foundations, grant programs, and lodging/travel support.
Find a clinical-trial specialist
Search matching studies and speak with NCI trial information specialists.
Get urgent help
Fever of 100.4°F (38°C) or higher during chemo, severe pain, or trouble breathing: call your cancer care team right away, day or night. Call 911 for an emergency.
Know someone who needs this?
Plenty of people are looking for something like this and do not know where to start. If this would help a friend or someone you love, send it on — we have written an opening line so you do not have to stare at an empty message. You can change every word of it.
Your message is written and sent in your own email or messaging app — we never see who you send it to, and nothing is added to any list.
Plain-language explanation of the published sources cited on this page. AI-assisted, source-checked, not clinician-reviewed.
Sources last checked: 2026-08-13 what this meansLast updated: 2026-09-29Next planned review: 2027-01-22
Review details and limits
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status — Source checked. This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
High-risk topic — talk to your care team. This topic can involve urgent, individual medical decisions. This page is general education only: it cannot tell you whether your situation is an emergency or what you personally should do. Follow your oncology team's instructions and contact them for individual guidance.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
Words to know
Tap any term to see what it means.
How this page was created
Cancer Explained does not originate medical claims. Every page restates guidance already published by the National Cancer Institute, the CDC, the USPSTF and the FDA, in plain language, with the source cited so you can check the original yourself. AI does the translating and organizing; automated checks test claims, citations, clarity and safety before anything publishes, and this is translation and navigation, not clinical judgment. Nothing here is personal medical advice, and no page can account for your particular situation.
Editorial status: Source checked — This page was written with AI assistance and then compared with the sources listed on it, looking for statements those sources do not back up. That check is not a sentence-by-sentence record and can miss errors. It is not a medical review, and it does not confirm the page is complete or right for your situation.
Human medical review: not completed. Pages here are not signed off by a clinician before they publish. That is not an oversight we are quietly working around: we restate published guidance and cite it, so the authority belongs to the source rather than to us, and every page names where its claims come from — you can verify us instead of trusting us. Where a volunteer clinician has reviewed a page, their name and credentials appear on it; where no name appears, no clinician has checked it. We are glad to have reviewers and are recruiting them, and we do not hold pages back waiting for one. Use this site to understand your situation and to ask better questions of the people treating you.
Read more about our editorial process, our use of AI, and our corrections policy.
Spotted a problem? Report an error — a factual mistake, broken or outdated source, confusing wording, or anything that seems unsafe. Please do not include names, medical record numbers, dates of birth, addresses, or other identifying medical information in your report.
After using this page, do you understand what to do next?
Anonymous — we only record the answer, never who gave it.