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" ... Lupus can be a very confusing disease. Lupus is considered one of "The Great Imitator" or "The Great Masquerader" diseases, meaning that it can look like and be mistaken for other medical conditions. Different people have different symptoms. Symptoms also wax (during flares) and wane and can change over time. Since there isn't a single simple test to diagnose lupus, people may go years having unexplained symptoms before getting a diagnosis of lupus. Usually a doctor will diagnose lupus by some combination of reviewing the history of symptoms, determining if any other related family members have lupus, a physical exam, laboratory tests such as a complete blood count, blood chemistry tests, erythrocyte sedimentation rate, antinuclear antibody (ANA) test and urinalysis, chest x-ray, echocardiogram and kidney biopsy. Not all of these are necessary for every patient. ... "
" ... Your red blood cells are supposed to look like little doughnuts with no holes in them, so-called bi-concave discs. Here is a picture of scientist holding up a model of a red blood cell, otherwise known as an erythrocyte: ... "