The short answer
Lymphoma is staged from I to IV. The stage describes how many lymph node groups are involved, whether the disease is on one or both sides of the diaphragm, and whether it has spread to organs outside the lymph system.
Lymphoma staging uses stages I to IV, which is different from how most solid tumors are staged.
Stage I means one lymph node group is involved. Stage IV means the lymphoma has spread throughout one or more organs outside the lymph system.
Letters are added to the stage. B symptoms are fever, drenching night sweats, or weight loss without a known reason. E means spread outside the lymph nodes and S means the spleen is involved.
Your care team uses the stage, along with the subtype, to plan treatment.
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The simple version
This page is for people with lymphoma and their families who want to understand what their stage means. Lymphoma is staged from I through IV. The stage rests mainly on how many lymph node groups are involved, and where.
The four stages
- Stage I: Lymphoma is in one lymph node group or lymphoid tissue.
- Stage II: Lymphoma is in two or more lymph node groups on the same side of the diaphragm. The diaphragm is the muscle separating the chest from the abdomen.
- Stage III: Lymphoma is on both sides of the diaphragm. It may also involve the spleen.
- Stage IV: Lymphoma has spread throughout one or more organs outside the lymph system.
The letters that come with the number
B symptoms. These are fever, drenching night sweats, and weight loss without a known reason. Call your care team right away if you have a fever, and tell them about night sweats or weight loss.
E. This means the lymphoma has spread to tissue outside the lymph nodes (extranodal).
S. This means the spleen is involved.
Why stage doesn't tell the whole story
The stage is one piece of information. Ask your care team to explain your stage alongside your specific lymphoma subtype, and how it may affect your treatment and outlook.
Questions to ask
- What stage is my lymphoma, and how was it determined?
- Do I have B symptoms according to my results?
Sources
Common questions
How is lymphoma staged?
It is a staging system used for lymphoma. It stages lymphoma from I to IV based on how many lymph node groups are involved, whether they are on one or both sides of the diaphragm (the muscle that separates the chest from the abdomen), and whether the lymphoma has spread to organs outside the lymph system.
What do the letters after my stage number mean?
B means you have B symptoms: fever, drenching night sweats, or weight loss without a known reason. E means the lymphoma has spread outside the lymph nodes. S means the spleen is involved. Ask your care team what the letters mean for you.
Does a higher stage mean a worse outlook?
The stage is one factor your care team uses to plan treatment. Ask your care team how your stage and your lymphoma subtype affect your outlook.
Questions to ask your doctor
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Last updated: 2026-10-16Next planned review: 2027-08-03
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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.
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