The diagnosis of lupus is best made by an experienced clinician who fully understands the disease and other diseases with similar features that can mimic lupus. The diagnosis is made when a patient has several features of the disease (including symptoms, findings on examination and blood test abnormalities). The American College of Rheumatology has devised criteria to assist clinicians in making the correct diagnosis of lupus.
It can be very scary to receive a lupus diagnosis, have your life disrupted and cause you to become uncertain about the future. The good news is that strides are continually being made in the discovery of better diagnostic tools and more effective medications. With the combination of correct treatment, medication, and living a healthy lifestyle, many people with lupus can look forward to a leading a long and productive life.
Lupus is an incredibly complex autoimmune disease and diagnosing lupus can take a lot of time and many doctor visits. Patients will often get diagnosed with other “overlap” diseases such as rheumadoid arthritis (RA), Sjogren’s Syndrome, scleroderma, fibromyalgia or Raynaud’s Phenomenon even before a diagnosis of lupus is made. This can be incredibly frustrating for you as well as your doctors. Understanding the process of getting a lupus diagnosis is one of the most common questions we get here as well as a main topic in the discussions on our Facebook page and our other social media platforms. The goal of this blog is to give a clear understanding of the diagnosis process and provide the tools needed to go back to your doctor (or a new doctor) armed with the information you need.
Elevation of the antinuclear antibody (ANA) titer to 1:40 or higher is the most sensitive of the ACR diagnostic criteria. More than 99 percent of patients with systemic lupus erythematosus have an elevated ANA titer at some point,21,41 although a significant proportion of patients may have a negative ANA titer early in the disease.2 However, the ANA test is not specific for systemic lupus erythematosus. A study41 involving 15 international laboratories found that ANA tests in the general population were positive in 32 percent of persons at a 1:40 dilution and in 5 percent of persons at a 1:160 dilution. Rates of positive ANA tests were not affected by age up to 60 years (the upper age limit of the study).41
Another common comorbidity with SLE is osteoporosis; researchers have found an increased risk of fracture and bone loss in SLE. Experts attribute this to several factors, including glucocorticoid medications that can lead to bone loss, inactivity due to symptoms such as pain and fatigue, and possibly the disease activity itself. In addition, women comprise approximately 90% of people with SLE, adding to their generally elevated osteoporosis risk.5
You may need to see different kinds of doctors to treat the many symptoms of lupus. Once you’re diagnosed, your primary physician for lupus is usually a rheumatologist, who treats arthritis and other diseases that cause swelling in the joints. The rheumatologist may then send you to a clinical immunologist for treating immune system disorders; a nephrologist (kidney disease); a hematologist (blood disorders); a dermatologist (skin diseases); a neurologist (the nervous system); a cardiologist (heart and blood vessel problems), and an endocrinologist (glands and hormones).
Lupus is an autoimmune disease that takes on several forms, of which systemic lupus erythematosus (SLE) is one. Lupus can affect any part of the body, but it most commonly attacks your skin, joints, heart, lungs, blood cells, kidneys, and brain. Around 1.5 million Americans have some form of lupus, according to the Lupus Foundation of America, with an estimated 16,000 newly diagnosed each year. Anyone at any age can acquire the disease, though most lupus patients are women between the ages of 15 and 45.
“NHS dieticians seem to specialise in those struggling to lose (rather than gain) weight in my experience. On my initial consultation I was given a booklet with advice based on eating a full English breakfast, then snacks like doughnuts and pork pies. My sons would be thrilled to get medical advice to eat like that! The nutritional supplements they offer taste extremely artificial to me. I can only eat a little and very slowly, so get to ‘savour’ every sip of it. I’m trying protein shakes I buy myself, which taste better, but just one of those is very filling.”
Why the test is used: Between 75% and 90% of people with lupus have a positive anti-dsDNA test. Also, the test is very specific for lupus. Therefore, a positive test can be useful in confirming a diagnosis. For many people, the titer, or level, of the antibodies rises as the disease becomes more active. So, doctors can also use it to help measure disease activity. Also, the presence of anti-dsDNA indicates a greater risk of lupus nephritis, a kidney inflammation that occurs with lupus. So a positive test can alert doctors to the need to monitor the kidneys.
As with all autoimmune conditions, lupus is a disease of the immune system. Your immune system has a very sophisticated mechanism for keeping you safe that it uses to identify the foreign substances that you come into contact with every day, such as allergens, toxins, infections, and even food. If your immune system deems anything dangerous, it will produce antibodies to ward off the harmful intruders.
Lupus is an autoimmune disease characterized by acute and chronic inflammation of various tissues of the body. Autoimmune diseases are illnesses that occur when the body's tissues are attacked by its own immune system. The immune system is a complex system within the body that is designed to fight infectious agents, such as bacteria and other foreign microbes. One of the ways that the immune system fights infections is by producing antibodies that bind to the microbes. People with lupus produce abnormal antibodies in their blood that target tissues within their own body rather than foreign infectious agents. These antibodies are referred to as autoantibodies.
How an autoimmune disease affects you depends on what part of the body is targeted. If the disease affects the joints, as in rheumatoid arthritis, you might have joint pain, stiffness, and loss of function. If it affects the thyroid, as in Graves’ disease and thyroiditis, it might cause tiredness, weight gain, and muscle aches. If it attacks the skin, as it does in scleroderma/systemic sclerosis, vitiligo, and systemic lupus erythematosus (SLE), it can cause rashes, blisters, and color changes.
Due to the variety of symptoms and organ system involvement with SLE, its severity in an individual must be assessed in order to successfully treat SLE. Mild or remittent disease may, sometimes, be safely left untreated. If required, nonsteroidal anti-inflammatory drugs and antimalarials may be used. Medications such as prednisone, mycophenolic acid and tacrolimus have been used in the past.
Belimumab, a type of agent referred to as a B-lymphocyte stimulator (BLyS) protein inhibitor, was approved by the U.S. Food and Drug Administration (FDA) in March 2011 for patients with lupus who are receiving other standard therapies, including those listed above. Given by IV infusion, belimumab may reduce the number of abnormal B cells thought to be a problem in lupus.
These are low in nutrients and may also contribute to poor digestion, weight gain, inflammation and other symptoms. Most also contain gluten, a type of protein found in wheat, barley, rye and most flour-containing products. Gluten sensitivity or intolerance is common in those with autoimmune disorders because gluten can be difficult for many people to digest properly, increasing leaky gut syndrome and triggering symptom flare-ups. (6)
Donna Jackson Nakazawa, researcher, writer, and author of The Autoimmune Epidemic, says "patients with lupus do better if they follow an 'anti-autoimmune diet,' which means consuming whole foods, rather than processed foods. This means lamb, chicken, or turkey; fish with low mercury content; hormone-free eggs; organic vegetables and fresh fruits; whole grains from gluten-free sources; nuts and seeds; and olive, sesame, and flaxseed oils. It also means avoiding highly processed foods, including preserved bread products, cereals and snacks, preserved meats, and other foods that are often full of chemicals, preservatives, and additives."
Although guidelines for SLE treatment do exist and there is scarce evidence to support specific therapies for Latin American patients with lupus,16–21 this regional effort has considered the impact of racial/ethnic background1 10 22–28 and SES3 9 on lupus outcomes and treatment response.25 26 Other medication variables such as cost and availability were also taken into account since they affect adherence and are relevant in decision-making.27 28 GLADEL and the Pan-American League of Associations of Rheumatology have joined efforts to produce these guidelines,29 which are presented by organ systems, although manifestations usually occur in more than one. Nevertheless, treatment is usually tailored to the more severe manifestation(s), which usually benefits the less severe.
An increase in the size of an organ, structure, or the body due to growth rather than tumor formation. This term is generally restricted to an increase in size or bulk that results not from an increase in the number of cells but from an increase in a cellular component, e.g., proteins. It applies to any increase in size as a result of functional activity.
Not necessarily. The antinuclear antibody (ANA) test is positive in most people who have lupus, but it also may be positive in many people who are healthy or have another autoimmune disease. Therefore, a positive ANA test alone is not adequate for the diagnosis of lupus. There must be at least three additional clinical features from the list of 11 features for the diagnosis to be made.
Vasculitis affecting medium and small arteries, particularly at the point of bifurcation and branching. Segmental inflammation and fibrinoid necrosis of blood vessels lead to ischemia of the areas normally supplied by these arteries. Signs and symptoms depend on the location of the affected vessels and organs, but patients usually present with symptoms of multisystem disease, including fever, malaise, weight loss, hypertension, renal failure, myalgia, peripheral neuritis, and gastrointestinal bleeding; these may occur episodically. Unlike most types of vasculitis, PAN does not affect glomerular capillaries although other renal vessels are involved. The disease is associated with hepatitis B and C.
Decorin is a protein coded for by the DCN gene. This protein is a component of the extracellular matrix, which is the intricate lattice of proteins and other molecules that forms in the spaces between cells. Decorin is found in the extracellular matrix of a variety of connective tissues, including skin, tendon, bone, and cartilage. Connective tissues support the body’s joints and organs. Decorin is involved in the organization of proteins called collagens. Collagens strengthen and support connective tissues throughout the body. Collagens also play an important role in the cornea, which is the clear outer covering of the eye. Bundles of collagen called fibrils must be strictly organized for the cornea to be transparent. Decorin ensures that these collagen fibrils are uniformly sized and regularly spaced.
Systemic lupus erythematosus is a multisystem inflammatory disease that is often difficult to diagnose. Before the diagnosis can be established, four of 11 clinical and laboratory criteria must be met. Antinuclear antibody titer is the primary laboratory test used to diagnose systemic lupus erythematosus. Because of the low prevalence of the disease in primary care populations, the antinuclear antibody titer has a low predictive value in patients without typical clinical symptoms. Therefore, as specified by the American College of Rheumatology, this titer should be obtained only in patients with unexplained involvement of two or more organ systems. Pa tients with an antinuclear antibody titer of 1:40 and characteristic multiorgan system involvement can be diagnosed with systemic lupus erythematosus without additional testing; however, patients with an antibody titer of 1:40 who fail to meet full clinical criteria should undergo additional testing, including tests for antibody to doublestranded DNA antigen and antibody to Sm nuclear antigen. While an antinuclear antibody titer of less than 1:40 usually rules out systemic lupus erythematosus, patients with persistent, characteristic multisystem involvement may be evaluated for possible antinuclear antibody–negative disease.
Erythrocyte sedimentation rate. This blood test determines the rate at which red blood cells settle to the bottom of a tube in an hour. A faster than normal rate may indicate a systemic disease, such as lupus. The sedimentation rate isn't specific for any one disease. It may be elevated if you have lupus, an infection, another inflammatory condition or cancer.
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