Associated Conditions Make an Appointment Refer a Patient Ask a Question Reviewed by the National Heart Lung and Blood Institute (August 01, 2009) Vasculitis is often related to other diseases, sometimes occurring in patients that are also affected by these conditions. Autoimmune system diseases. These are diseases that the vasculitis patient may have had for years, in which the body's immune system mistakenly attacks the body itself. Examples include systemic lupus erythematosus (lupus), rheumatoid arthritis, and scleroderma. Blood cancers. These include leukemia and lymphoma. Treatment Clinical Trials For more than 100 years, National Jewish Health has been committed to finding new treatments and cures for diseases. Search our clinical trials.