understanding difference between median survival and ten-year relative survival

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Hi, I am confused from my literature search and would like very much to understand how stage 3 Sezary Syndrome median survival rate is described as 4-6 years, while a ten-year relative survival rate is 83%? Does this mean there is 83% chance of ten year survival?

I was diagnosed with sezary syndrome 4 years ago, at stage 4a.  I underwent treatment with mogamulizumad for four months, which caused my Crohn's to come out of remission; then had terrible arthritis which led to a spinal blood  and near paralysis before being detected;and severe anemia.  Stopped moga after 4 months.  Have had 7 months of photopheresis - not effective, itch worse and spreading bodywide, severe hand and feet cracking.  My oncologist restaged me as late 3,but wants to begin radiation immediately. I desperately want an honest prediction, which I know is only a prediction - but I am taking care of my wife of 46 years who now has dementia- and I can't plan with my family what to do without a better prediction- of maximum life expectancy at this stage, or at least the odds of livng another five years. Internet searching has got me nowhere.  Thank you for your help!

  • Hi Michaelbythesea,

    My name is Anne and I’m one of the Cancer Information Nurses from the Support Line. I see you were looking for information here not long ago regarding your diagnosis of Sezary Syndrome. I understand you are still keen to know more about your prognosis. It might be more helpful to have a chat with your Clinical Nurse Specialist or Consultant regarding this. They have access to your medical records and are better placed to discuss your own individual situation.

    I’m sorry to read that your wife now has dementia. This must be a difficult time for you and your family. Caring for someone can be tiring so it is important to make sure you take care of yourself too. I appreciate how helpful it would be knowing more about your prognosis so you are able to plan ahead with regards to ensuring your wife is cared for. A Carer’s Assessment can be useful and your local Social Services Team can help organise this.

    It might also be more helpful to speak to one of the Nurses on The Support Line. Although we won’t be able to advise on your prognosis, as we are not part of your healthcare team, we may be able to offer other support and advice.

    Take care for now,

    Anne – Cancer Information Nurse Specialist