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Living with Grade III lymphomatoid granulomatosis

An advanced form of a rare lymphoma in which nodules damage blood vessels, often in the lungs, skin, and nervous system.

Understanding Grade III lymphomatoid granulomatosis

Grade III lymphomatoid granulomatosis is the advanced form of a rare progressive lymphoma in which nodular lesions destroy blood vessels.

Lymphomatoid granulomatosis (LG) most often affects people in their 50s and 60s, but also occurs in other adults and in children. The lungs are usually affected, and the skin and central nervous system can be involved. It is made of B-cells that carry Epstein-Barr virus (EBV), mixed with reactive T-cells, and often occurs with an underlying immune problem such as rheumatoid arthritis, organ transplant, or HIV. Grade III is treated as a subtype of diffuse large B-cell non-Hodgkin lymphoma.

Signs & symptoms

GARD doesn't list specific symptoms for this condition yet. The summary says features can reflect disease in many organs, including:

  • Lung involvement
  • Skin involvement
  • Central nervous system involvement

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

    Your doctor may refer you to a specialist who knows rare conditions.

  3. Ask which tests can help

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

Care & treatment

Care team
A doctor familiar with rare conditions, plus specialists as needed
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 rare disease patient organizations for support
  • 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
What does grade III mean for my treatment plan?
Which tests show how far the lymphoma has spread?
How does my immune condition affect my care?

Quick facts

GARD says it often occurs with an underlying weakened immune state, such as rheumatoid arthritis, organ transplant, or HIV, and involves cells with Epstein-Barr virus.

Patient organizations

Rare-disease groups that can help

Source: NIH GARD · Grade III lymphomatoid granulomatosisGARD ID 26761 · GARD page updated September 2026 · Plain-language summary by Know Rare; editorial review pending. General information, not medical advice.

You are more than your diagnosis

Perspectives from people navigating life with Grade III lymphomatoid granulomatosis.

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Explore actively recruiting Grade III lymphomatoid granulomatosis studies with HealthSpark.

HealthSpark

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  • Eligibility is confirmed by the study team

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