When filling out a health questionnaire, you will now need to check Yes. Multiple myeloma is a blood cancer. With MM, cancerous plasma cells accumulate in the bone marrow and crowd out healthy blood cells. https://www.mayoclinic.org/diseases-conditions/multiple-myeloma/symptoms-causes/syc-20353378

Polycythemia Vera is another blood cancer that allows the marrow to produce too many red blood cells. Polycythemia vera is a type of blood cancer known as myeloproliferative neoplasm (MPN). This is what our Mayo Clinic website has to say about PV https://www.mayoclinic.org/diseases-conditions/polycythemia-vera/symptoms-causes/syc-20355850

So, unfortunately, the answer is yes. But the positive is, its treatable. ☺️