ANCA (Antineutrophil Cytoplasmic Antibodies), IFA is a blood test used to detect antibodies that mistakenly attack the body's own white blood cells. These antibodies are associated with certain autoimmune diseases, particularly vasculitis, which causes inflammation of blood vessels. The IFA (Immunofluorescence) method involves examining a sample of blood under a microscope for the presence of these antibodies. Positive results can help diagnose specific types of vasculitis and monitor disease activity.

High-sensitivity C-reactive protein (hs-CRP) is a blood test that measures a specific type of protein produced by the liver in response to inflammation. While standard CRP tests detect significant inflammation, hs-CRP is more sensitive, identifying even subtle increases. This makes it a valuable tool for assessing cardiovascular risk, as elevated hs-CRP levels have been linked to an increased risk of heart attack and stroke, even in individuals with normal cholesterol levels. However, it's important to note that hs-CRP alone cannot diagnose a specific condition and should be interpreted in conjunction with other risk factors and medical evaluations.