Enlarged Lymph Node on a Scan: What Happens Next?

This page is for anyone whose scan report mentions an enlarged lymph node. It explains what that finding can and cannot mean, common next steps, and questions to ask your care team.

Lymph nodes react to many things, including infection and inflammation, so a scan finding needs context. An abnormal result is a reason to look closer. It is not, by itself, a cancer diagnosis. The next step is usually to:

• confirm the finding
• compare it with prior records
• choose the right follow-up test
• decide whether a biopsy or specialist visit is needed

MedlinePlus says swollen lymph nodes have three main groups of causes. Infections are the most common, such as colds, flu, mononucleosis, tonsillitis, and dental problems. Immune or autoimmune disorders can also cause them. Cancers such as lymphoma and leukemia can too, because a nearby lymph node is often the first place a cancer spreads.

Size, shape, and location in the report all matter to your care team. The same phrase can mean different things depending on your age, symptoms, personal and family history, prior results, and the exact wording in the report. If you can, ask for the full report rather than relying only on a portal headline.

Follow-up may include:

• a clinical exam
• repeat imaging, ultrasound, or PET/CT
• blood work
• treating an infection first, then rechecking
• a lymph node biopsy. MedlinePlus describes a needle biopsy, often guided by ultrasound or CT, and an open biopsy, which is surgery to remove all or part of the node

MedlinePlus says your provider may order blood tests, a chest X-ray, a CT scan, or a biopsy, depending on your symptoms and history. Ask your care team how soon each step should happen.

• What exactly was abnormal, and what is the exact wording in my report?
• Is this a screening result, an imaging finding, a lab value, or a pathology result?
• What are the most common non-cancer explanations?
• Is there anything from my history that makes this more or less concerning?
• What follow-up test do you recommend, and what will it answer?
• If a biopsy is recommended, what type and when?
• What happens if the next test is normal, or still unclear?
• How and when will I receive the result?

Waiting can feel like its own kind of illness. A practical way to reduce uncertainty is to write down the plan: the next appointment, the test name, the expected timing, and the person who will call.

MedlinePlus says to contact your provider if swollen nodes do not shrink after several weeks, or if they become red, tender, hard, or fixed in place. Contact your provider right away for fever, night sweats, or unexplained weight loss.

If you have new severe symptoms, heavy bleeding, trouble breathing, neurologic changes, fever during treatment, or rapidly worsening pain, do not wait for a routine appointment. Use the urgent instructions from your care team or seek emergency care.

• It does not prove you have cancer.
• It does not rule cancer out.
• It does not replace the official report.
• It does not tell you whether waiting is safe for your exact situation.
• It does not replace a clinician who can see your history and images.

• MedlinePlus: Swollen lymph nodes
• MedlinePlus: Lymph node biopsy

Helpful next pages include Understanding Screening Results, Biopsy, Imaging Tests for Cancer, Getting a Second Opinion, and When Should You Worry About a Symptom?.