The short answer
Lymphoma treatment depends on naming the exact subtype, and that needs enough tissue: a core needle gave a definite diagnosis in 92.3% of cases against 98.1% for a whole node. Hepatitis screening and a fertility referral belong before the first dose.
In a review of more than 32,000 lymphoma cases in France, core needle biopsy gave a definite diagnosis in 92.3% of cases and removing a whole node in 98.1%.
The FLIPI score for follicular lymphoma is built from age, LDH level, stage, hemoglobin, and how many node areas are involved.
Hepatitis B screening before anti-CD20 treatment means three tests, HBsAg, anti-HBc and anti-HBs; chronic and past infection are handled differently, and antivirals are arranged before the first dose.
Reducing radiation volume lowered the later risk of breast cancer after Hodgkin lymphoma, and proton therapy may be considered when the field covers the left side of the heart.
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The full explanation.
The biopsy decides everything after it
Lymphoma treatment depends on naming the exact subtype. That needs enough tissue.
NCI reviewed more than 32,000 lymphoma cases in France. A core needle biopsy gave a definite diagnosis in 92.3% of cases. Removing a whole node gave one in 98.1%.
That gap is small but real. If your diagnosis came from a needle and the subtype is unclear, ask whether a node should come out.
Prognostic scores you can ask for by name
Lymphoma has published risk scores, and your team has already worked yours out.
For follicular lymphoma, NCI describes the FLIPI. Its five factors are age, LDH level, stage, hemoglobin, and how many node areas are involved.
Ask what your score is. Ask what it predicts and what it does not.
Lymphoma is dozens of diseases. Hodgkin lymphoma, follicular lymphoma, diffuse large B-cell lymphoma and the rarer T-cell types are staged, treated and monitored differently, and the evidence quoted here is drawn from more than one of them. Use these as questions to raise, and check every answer against your own named subtype.
Safety tests before the first dose
Some checks belong before treatment, not after.
NCI says hepatitis B and hepatitis C should be assessed before rituximab or chemotherapy. Anything that targets CD20, rituximab included, can wake up a hepatitis B infection you may not know you have, and reactivation can cause liver failure.
Hepatitis B screening is not one test. ASCO's guidance is three blood tests together, and it is worth checking that all three were sent:
- HBsAg — hepatitis B surface antigen, positive in current infection.
- Anti-HBc — core antibody, which stays positive after an infection your body cleared years ago.
- Anti-HBs — surface antibody, from past infection or from vaccination.
The combination matters more than any single line. Someone who is HBsAg positive has chronic infection and generally needs antiviral cover, often entecavir, started before the first dose and continued well past the last one. Someone who is HBsAg negative but anti-HBc positive had the infection in the past; they are still at risk, and depending on viral load and regimen they may be given the same antiviral cover or monitored closely instead. Which of those two paths applies to you is decided by your oncology team, usually with a liver specialist, and the antiviral has to be arranged before treatment starts rather than after.
Ask whether your hepatitis screen was done, which of the three results were positive, and who is managing the liver side.
Protecting the heart and the breast from radiation
Radiation fields in the chest reach organs you want to keep.
NCI notes that reducing radiation volume lowered the later risk of breast cancer after Hodgkin lymphoma.
It also says proton therapy may be considered where chest radiation would cover the left side of the heart, or would raise breast cancer risk in young women.
Questions to ask before treatment starts
- Was my diagnosis made from a needle sample or a whole node?
- Is there enough tissue to name my subtype with confidence?
- What is my risk score, and what does it change?
- Do I need a PET scan and a bone marrow biopsy, and would the marrow result alter treatment?
- Has my hepatitis B and C screening been done?
- Can radiation to my chest be reduced, or would proton therapy lower the dose to my heart?
- Should I see a fertility specialist before the first cycle?
When not treating is the plan
For advanced follicular lymphoma, NCI lists watchful waiting as an option. Treatment is deferred until symptoms appear.
This is a real strategy, not neglect. Ask exactly what symptom or result would start treatment, and get it written down.
Fertility, before anything else starts
NCI's lymphoma summaries address fertility directly. The window to act is before the first cycle, not after it.
Ask for a referral now, even if you are unsure about children. It is much easier to decline later than to reverse.
Related pages
Also read: Cancer Staging, Cancer Treatment Overview, Clinical Trial vs Standard Treatment, and Questions to Ask Your Doctor.
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Words to know
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Common questions
Is a needle sample enough to name my subtype?
Usually, but not always. A core needle gave a definite diagnosis in 92.3% of cases against 98.1% for a whole node. If the subtype is unclear, ask whether a node should come out.
Why am I being screened for hepatitis before treatment?
Rituximab and other anti-CD20 drugs can reactivate hepatitis B. Screening means three tests together: HBsAg, anti-HBc and anti-HBs. Chronic infection generally needs antiviral cover before the first dose; past, cleared infection still carries risk and is managed by oncology with a liver specialist.
Can chest radiation be made safer?
Ask about volume and about protons. Smaller radiation volumes lowered later breast cancer risk, and proton therapy may be considered where the field would cover the left side of the heart.
Why would my team suggest waiting instead of treating?
For advanced follicular lymphoma, watchful waiting is a real strategy, not neglect. Ask exactly what symptom or result would start treatment, and get it written down.
Questions to ask your doctor
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Sources last checked: 2026-07-30 what this meansLast updated: 2026-08-19Next planned review: 2027-07-30
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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. We do not employ clinicians and do not intend to — our work 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 checked line by line against the sources listed on it. That confirms the sources support what the page says. 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.
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