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Living with Richter syndrome

A rare change in which chronic lymphocytic leukemia (CLL) turns into a fast-growing lymphoma.

Understanding Richter syndrome

Richter syndrome is a rare condition in which chronic lymphocytic leukemia (CLL) changes into a fast-growing type of lymphoma.

Symptoms can include fever, loss of weight and muscle mass, belly pain, and enlarged lymph nodes, liver, and spleen. Lab results may show anemia and low platelet counts, which can lead to easy bleeding and bruising.

Signs & symptoms

GARD lists these symptoms in its summary:

  • Fever
  • Loss of weight and muscle mass
  • Belly pain
  • Enlarged lymph nodes, liver, and spleen
  • Anemia
  • Easy bleeding and bruising

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 American Cancer Society 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
How did my doctors confirm the change from CLL?
What treatment options and clinical studies are available?
Which symptoms should I report right away?

Quick facts

GARD describes it as a change of CLL into a fast-growing lymphoma. It does not list a gene or inheritance pattern.

Also known as: richter transformation; richter's syndrome; richter's transformation

Patient organizations

Source: NIH GARD · Richter syndromeGARD ID 7578 · 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 Richter syndrome.

Explore the Richter syndrome blog

Explore research for Richter syndrome

Explore actively recruiting Richter syndrome studies with HealthSpark.

HealthSpark

Find actively recruiting studies for Richter syndrome with HealthSpark. Share your city to explore research near you.

  • Recruiting studies from ClinicalTrials.gov
  • Share your city to look for research near you
  • Eligibility is confirmed by the study team

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Powered by HealthSpark, our AI chat helper · Study information from ClinicalTrials.gov · Eligibility is confirmed by the study team.

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