Richter transformation: when CLL changes | CION Cancer Clinics

Richter transformation is when a slow-growing CLL changes into a fast-growing lymphoma. It is uncommon. Most people with CLL never develop it, but it is serious when it happens and needs a new plan quickly.

What actually changes

CLL is a cancer of lymphocytes, a type of white blood cell. In most people it grows slowly for years. In Richter transformation, some of those cells change their behaviour. They start to grow fast, usually inside a lymph node (a small gland that filters fluid, found in the neck, armpits and groin). The new disease is most often a type called diffuse large B-cell lymphoma. Less often it looks like Hodgkin lymphoma.

Why it is treated as a different illness

Watch and wait works for early CLL because the disease is slow. A transformed lymphoma is not slow. Waiting is no longer safe, and the treatment is closer to the treatment for an aggressive lymphoma than to the tablets used for CLL.

Who is more likely to develop it

Doctors cannot predict it for one person. Some features on the genetic tests done for CLL, such as changes in the TP53 gene, are seen more often in people who later transform. Having those features does not mean it will happen to you.

Treatment is aimed at the fast-growing lymphoma, not the CLL behind it. The plan depends on the type of transformation, whether it is clonally related, your age and fitness, and what CLL treatment you have already had.

Combination treatment for lymphoma

Most people who are fit enough are offered chemotherapy combined with an antibody medicine such as rituximab, similar to the treatment for diffuse large B-cell lymphoma. This kind of treatment is hard on the body. It does not suit people with serious heart, kidney or lung problems, or people who are very frail, and the team will say so plainly.

Transplant and CAR-T

If the lymphoma responds, some younger and fitter people are considered for a stem cell transplant or CAR-T cell therapy to hold the response. CION does not perform these. The haematology team presents your case and coordinates referral to a qualified centre. These routes do not suit most older patients.

Clinical trials and comfort care

Because standard treatment often works less well here than in other lymphomas, a clinical trial is a reasonable question to ask about. For people who are not fit for strong treatment, palliative care (care focused on comfort and quality of life) is a real plan, not giving up.

This page cannot tell you whether a change in your own glands is Richter transformation. Only a biopsy can. It also cannot tell you how you will respond to treatment, because that depends on the type of transformation, your earlier treatment and your general health.

If Richter is suspected

Ask which gland will be sampled and why. Ask how soon the biopsy can be done, since this is a situation where waiting weeks is not wise. Bring every earlier report, including the first CLL diagnosis and any genetic test results.

If Richter is confirmed

Ask whether it is clonally related. Ask what the aim of treatment is, whether transplant or CAR-T is being considered, and which centre would do it. Ask whether a clinical trial is open to you. The family member who helps with decisions should hear these answers first-hand.