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The course of a disease, also called its natural history, [3] is the development of the disease in a patient, including the sequence and speed of the stages and forms they take. [4] Typical courses of diseases include: chronic; recurrent or relapsing; subacute: somewhere between an acute and a chronic course
It is moderately effective in reducing the progression of the disease and the frequency of relapses in people after two years. [78] In 2007, it was the only medication approved in the US for both secondary progressive and progressive relapsing multiple sclerosis; however, it causes dose-dependent cardiac toxicity which limits its long-term use.
Not all chronic diseases are progressive: a chronic, non-progressive disease may be referred to as a static condition. Progressive disease can also be a clinical endpoint i.e. an endpoint in a clinical trial. A progressive disease should not be confused with a terminal disease, the difference being that a terminal disease invariably leads to death.
Although the use of the term DMARDs was first propagated in rheumatoid arthritis (hence their name), the term has come to pertain to many other diseases, such as Crohn's disease, lupus erythematosus, Sjögren syndrome, immune thrombocytopenic purpura, myasthenia gravis, sarcoidosis, and various others. [citation needed]
A disease-modifying treatment, disease-modifying drug, or disease-modifying therapy is a treatment that delays, slows or reverses the progression of a disease by targeting its underlying cause. [1] They are distinguished from symptomatic treatments that treat the symptoms of a disease but do not address its underlying cause. [2]
Following infection with HIV, the rate of clinical disease progression varies enormously between individuals. Many factors such as host susceptibility and immune function, [2] [3] [4] health care and co-infections, [5] [6] [7] as well as factors relating to the viral strain [8] [9] may affect the rate of clinical disease progression.
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Progression-free survival (PFS) is "the length of time during and after the treatment of a disease, such as cancer, that a patient lives with the disease but it does not get worse". [1] In oncology, PFS usually refers to situations in which a tumor is present, as demonstrated by laboratory testing, radiologic testing, or clinically. Similarly ...