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Living with Malignant lymphoma, large B-cell, diffuse

A fast-growing cancer of immune cells called B cells, usually found in adults, often starting with swollen lymph nodes.

Understanding Malignant lymphoma, large B-cell, diffuse

Diffuse large B-cell lymphoma (DLBCL) is a fast-growing cancer of the immune system's B cells and a form of non-Hodgkin lymphoma.

B lymphocytes grow and multiply without control. DLBCL happens mostly in adults. It can start in the lymph nodes or outside the lymphatic system, such as in the gut, testes, thyroid, skin, breast, bone, or brain. The first sign is often painless, rapid swelling from enlarged lymph nodes.

Signs & symptoms

GARD doesn't list a separate symptom list, but its summary describes these:

  • Swelling in the neck, armpit, abdomen, or groin
  • Swelling that is usually painless but may be painful
  • Night sweats
  • Unexplained fevers
  • Weight loss

Not everyone has every symptom. GARD's list comes from the Human Phenotype Ontology.

Diagnosis

  1. Talk with your doctor

    Share the symptoms you've noticed, when they started and your family health history. Notes and photos can help.

  2. See a specialist

    Specialists who may be involved include blood and bone marrow specialists and cancer specialists.

  3. Ask which tests can help

    Your care team will decide which exams and tests can confirm the diagnosis.

Care & treatment

Care team
Blood and bone marrow specialists (hematologists); Cancer specialists (oncologists)
Expert care
Ask about multidisciplinary care centers for rare conditions
Treatment
GARD doesn't list specific treatments for this condition. Your care team will tailor care to your symptoms.
Research
Clinical trials and observational studies may be options. See the research section below.

General information, not medical advice. Your care team makes the decisions.

Everyday life

Living with a rare condition is easier with support.

  • Connect with HealthTree Foundation and other patient organizations
  • Keep notes on symptoms, changes and questions for appointments
  • Ask about patient registries that help research
  • Look into financial aid and travel resources for care visits
Bring these questions to your next doctor visit
Where is the lymphoma and what stage is it?
What treatment options are available for me?
Which symptoms should I report right away?

Quick facts

Symptoms usually startAdult

GARD says lymphomas occur when B lymphocytes grow and multiply uncontrollably. GARD doesn't name a gene or other cause.

Blood

Also known as: centroblastic diffuse large b-cell malignant lymphoma; centroblastic diffuse malignant lymphoma; centroblastic malignant lymphoma; diffuse large b cell lymphoma; diffuse large b cell malignant lymphoma; diffuse large b-cell lymphoma

Patient organizations

Source: NIH GARD · Malignant lymphoma, large B-cell, diffuseGARD ID 3178 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

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