COVID-19 Resources

Coronavirus (COVID-19) and Castleman disease

Given the global crisis occurring due to COVID19 and the urgent need to identify effective therapeutics, the heightened risk of COVID19 to Castleman disease patients and other patients with immunological disorders and immunocompromise, and the CSTL’s expertise regarding drug repurposing, CSTL members and CDCN volunteers have begun directing efforts toward fighting COVID19 (while maintaining focus and efforts on our other high-priority studies)

The CDCN and CSTL continue to be a source for accurate, trusted information on the COVID-19 pandemic across our community. Below you will find updates on our COVID work, guidance on the vaccination of our Castleman disease patients, and answers to frequently asked questions.

Guidance on COVID-19 from our SAB:


Frequently Asked Questions:

Are all Castleman disease patients considered to be immunosuppressed and highly susceptible to COVID19?

COVID19 has been classified as a global pandemic. There is a wide range of severity of illness and deadliness based on a number of risk factors. People who are most at risk are the elderly and those with chronic illnesses, especially lung disease. Patients who are immunosuppressed are thought to be at increased risk. The current recommendations are for these people to avoid crowds.

Individuals with only one of the four subtypes of Castleman disease are considered to be immunosuppressed at all times: HHV-8-associated multicentric Castleman disease patients are considered to be immunosuppressed.

Individuals with any of the other three subtypes of Castleman disease (unicentric Castleman disease, POEMS-associated multicentric Castleman disease, and idiopathic multicentric Castleman disease) are not considered to be immunosuppressed at all times. They are only considered to be immunosuppressed if they have recently received or are currently being treated with immunosuppressive treatment.

Immunosuppressive treatments that individuals with Castleman disease often receive include cyclophosphamide, etoposide, adriamycin, rituximab, siltuximab, tocilizumab, sirolimus, and cyclosporine. We don’t know if individuals treated with any of the above treatments are actually at increased risk or not. Obviously, we hope not.

Even if it’s not clear if Castleman disease patients are highly susceptible to COVID19, what should I do to lower my risk?

COVID19 spreads from person to person by coughing and sneezing on surfaces, where the next person touches their face. Please follow CDC ( and WHO recommendations for how to prevent spread:

  • Hand-washing frequently and avoid touching your face
  • Social distancing: Avoid large gatherings and take precautions to limit exposure to sick people is important
  • Stay home when you are sick
  • Cough/sneeze into your elbow

It’s important that you stay as healthy as possible before getting infected. We would not want you to get the regular flu, be debilitated by that, and then get the coronavirus soon after. The result could be much worse than just getting coronavirus alone. If you have not been immunized against influenza you should get it as soon as possible.

Should I stop my Castleman disease treatment to help prevent my becoming ill with COVID19?

There is no data currently available to support discontinuing treatment to prevent coronavirus infection. The treatments often given to patients with Castleman disease may or may not increase or potentially decrease your risk of infection and your ability to fend off the infection. Please contact your physician if you have any questions.

Should I begin taking supplements and vitamins? Are there other alternatives?

There is no data to suggest that any vitamins and supplements improve outcomes in patients with COVID19. There are a few proven lifestyle choices that you can take to ensure you give yourself the best chance to do its job against any respiratory illness:

  • Lower your stress
  • Improve your sleep habits
  • Avoid excessive alcohol consumption
  • Eat a balanced diet, exercise, and skip unproven supplements (like elderberry)
  • Vitamin D (more research is needed)

Find more helpful information here:

What symptoms should I look out for?

Fever, dry cough (no mucous), difficulty breathing

If I think I have COVID19, where can I get information about how to get tested?

Go to your state health department website. The following website from the University of Washington provides information about a lab that can perform testing:

Should I seek medical care?

If you have Castleman disease, then it is important that you inform your physician and seek medical care. If you are seeing a physician that is not familiar with your case, inform your physician of your Castleman disease and any recent therapy that you may have received.

Should I stop my Castleman disease treatment if I become ill with COVID19?

There is no data on whether you should stop or continue your Castleman disease treatment after you become infected with COVID19. We recommend following the guidance of your local care team and/or Castleman disease physician.

I heard that tocilizumab is being used to treat COVID19 patients that do not have Castleman disease. Does that mean that my risk of developing COVID19 is lower if I’m currently treated with tocilizumab or siltuximab?

COVID19 causes death by igniting a ‘cytokine storm’ that requires ICU care. There is no data about whether treatment with tocilizumab or siltuximab in Castleman disease patients could prevent getting ill, but it is unlikely. The tocilizumab is being given to control the ‘cytokine storm’ that the virus causes. The tocilizumab is not treating the viral infection directly.

Will tocilizumab and siltuximab still be in stock?

Both companies are aware of the increased demand and will hopefully be able to supply enough of those medications but it isn’t possible to know what will happen.

Should I stay home from work?

This is a personal decision as to whether you feel it is safe to go to work, but we do recommend staying away from other ill people and potentially sick contacts.

How will I be able to determine what is normal Castleman disease fatigue and what is COVID-19 fatigue?

You should not try to figure out what is causing your fatigue, but if you have the symptoms commonly associated with COVID19 then you should seek medical attention and contact your physician.

What else can I do?

Be sure you have at least a one-month supply of all medications which are critical to your health. Don’t wait until the last minute to get a refill. If a drug is no longer available, talk to your physician about potential alternate medications which are available to get you through a temporary shortage.

We recommend trying not to panic or be afraid. Having an overtime mindset, focusing on what we can control, and turning our hopes and fears into concrete action is so important.

If it is likely that most people are eventually going to get this virus sooner or later, why are organizations, large companies, schools, and universities closing in-person classes or large gatherings?

These organizations are trying to delay people getting infected so that there are enough ICU beds, ventilators, and intensive care units to accommodate the rise in demand that will be required to appropriately manage the small proportion of those patients who contract the virus who develop serious complications and improve their outcomes. By slowing down the rate of spread so that it takes much longer for everybody to be exposed, it will reduce the number of people needing critical care at any one time, and hopefully, our system will be able to handle it.

These are not the final recommendations, watching the news, going to reliable websites such as the Centers for Disease Control (CDC) are important as this disease continues to develop.

Please contact your physician with any questions you may have.

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