Lupus in children tends to be more aggressive than in adults, says Dr. Pascual. The exact reasons for this are not understood. One theory is that people are born with genetic susceptibility to the disease that may be triggered by environmental factors such as a virus. “Children with the condition may have inherited a more complex set of predisposing genes,” she says. But this theory has yet to be proved.
Other diseases and conditions that can accompany lupus include fibromyalgia, coronary heart disease, nonbacterial valvular heart disease, pancreatitis, esophagus disease with difficulty swallowing (dysphagia), swollen lymph nodes (lymphadenopathy), liver disease (lupoid hepatitis), infections, and a tendency to spontaneous blood clotting and thrombosis.
The first mechanism may arise genetically. Research indicates SLE may have a genetic link. SLE does run in families, but no single causal gene has been identified. Instead, multiple genes appear to influence a person's chance of developing lupus when triggered by environmental factors. HLA class I, class II, and class III genes are associated with SLE, but only classes I and II contribute independently to increased risk of SLE. Other genes which contain risk variants for SLE are IRF5, PTPN22, STAT4, CDKN1A, ITGAM, BLK, TNFSF4 and BANK1. Some of the susceptibility genes may be population specific.
Systemic lupus erythematosus is a chronic, recurrent, potentially fatal multisystem inflammatory disorder that can be difficultto diagnose.1,2 The disease has no single diagnostic marker; instead, it is identified through a combination of clinical and laboratory criteria.3 Accurate diagnosis of systemic lupus erythematosus is important because treatment can reduce morbidity4–11 and mortality,12 particularly from lupus nephritis. This article reviews evidence-based recommendations for the diagnosis of systemic lupus erythematosus by primary care physicians.
While no single test can determine whether a person has lupus, several laboratory tests may help the doctor confirm a diagnosis, or at least rule out other ailments. The most useful tests identify certain autoantibodies that are often present in the blood of lupus patients. A biopsy of the skin or kidneys may also be ordered if those organs are affected. The doctor will look at the entire picture – medical history, symptoms, and test results – to determine if you have lupus. Other laboratory tests are used to monitor the progress of the disease once it has been diagnosed.
Levels of stress-related illnesses are on the rise, and stress, both emotional and physical, has been shown to trigger and intensify autoimmune disorders. Stress is your body’s response to a threat–a wound, injury, or infection. Acute stress revs up your immune system to help you deal with an immediate crisis, and then calms it back down once the threat is removed. On the other hand, chronic stress (the kind we face in this day and age) leads to long-term inflammation and actually suppresses your immune system. This can trigger or worsen autoimmune conditions, and can lead to the reactivation of latent viruses linked to lupus, perpetuating a vicious cycle.
There is no single diagnostic test for systemic lupus. The test you will hear most about is called the antinuclear antibody (ANA) test. This is not a specific test for lupus, however. In fact, a variety of laboratory tests are used to detect physical changes or conditions in your body that can occur with lupus. Each test result adds more information to the picture your doctor is forming of your illness.
Angiogenesis is the growth of blood vessels from the existing vasculature. It occurs throughout life in both health and disease, beginning in utero and continuing on through old age. No metabolically active tissue in the body is more than a few hundred micrometers from a blood capillary, which is formed by the process of angiogenesis. Capillaries are needed in all tissues for diffusion exchange of nutrients and metabolites. Changes in metabolic activity lead to proportional changes in angiogenesis and, hence, proportional changes in capillarity. Oxygen plays a pivotal role in this regulation. Hemodynamic factors are critical for survival of vascular networks and for structural adaptations of vessel walls.
Because the symptoms of lupus can mimic so many other health problems, you may need patience while waiting for a diagnosis. Your doctor must rule out a number of other illnesses before diagnosing lupus. You may need to see a number of specialists such as doctors who treat kidney problems (nephrologists), blood disorders (hematologists) or nervous system disorders (neurologists) depending on your symptoms to help with diagnosis and treatment.
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