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Health Illustrated Encyclopedia Multimedia Nabothian cyst 11/07/2011
A nabothian cyst is a mucus-filled lump on the surface of the cervix. The cervix is part of the female body. It is at the lower end of the womb (uterus) at the top of the vagina. It is about 1 inch long. Causes, incidence, and risk factors: The cervix is lined with glands and cells that release mucus. The glands can become covered by a type of skin cells called squamous epithelium. When this happens, the secretions build up in the plugged glands. They form a smooth, rounded bump on the cervix .
Health Illustrated Encyclopedia Multimedia Narcissistic personality disorder 11/10/2012
Narcissistic personality disorder is a condition in which people have an excessive sense of self-importance, an extreme preoccupation with themselves, and lack of empathy for others. Causes, incidence, and risk factors: Cause of this disorder is unknown. Early life experiences, such as particularly insensitive parenting, are thought to play a role in the development of this disorder. Symptoms: A person with narcissistic personality disorder may: React to criticism with rage, shame, or humiliation Take advantage of other people to achieve his or her own goals Have excessive feelings of self-importance Exaggerate achievements and talents Be preoccupied with fantasies of success, power, beauty, intelligence, or ideal love Have unreasonable expectations of favorable treatment Need constant attention and admiration Disregard the feelings of others, and have little ability to feel empathy Have obsessive self-interest Pursue mainly selfish goals Signs and tests: Narcissistic personality disorder is diagnosed based on a psychological evaluation that assesses the history and severity of the symptoms.
Health Illustrated Encyclopedia Multimedia Narcolepsy 09/26/2011
Daytime sleep disorder; Cataplexy Causes, incidence, and risk factors: Narcolepsy is a nervous system disorder. The exact cause is unknown. In some patients, narcolepsy is linked to reduced amounts of a protein called hypocretin, which is made in the brain. What causes the brain to produce less of this protein is unclear. There is a possibility that narcolepsy is an autoimmune disorder.
Health Illustrated Encyclopedia Multimedia Nasal polyps 08/31/2011
Aspirin sensitivity (wheezing) Asthma Chronic sinus infections Cystic fibrosis Hay fever ( allergic rhinitis ) Symptoms: People with nasal polyps often complain about having a cold that has lasted for months or years.
Health Illustrated Encyclopedia Multimedia Natural short sleeper 05/09/2010
Sleep - natural short sleeper Causes, incidence, and risk factors: Although each person's need for sleep varies, the typical adult needs an average of 7 - 9 hours of sleep each night. Short sleepers sleep less than 75% of what is normal for their age. Natural short sleepers are different from people who chronically do not get enough sleep because of work or family demands, or who have medical conditions that disrupt sleep.
Health Illustrated Encyclopedia Multimedia Nearsightedness 09/03/2012
Myopia; Shortsightedness; Refractive error - nearsightedness Causes, incidence, and risk factors: People are able to see because the front part of the eye bends (refracts) light and points it to the back surface of the eye, called the retina.
Health Illustrated Encyclopedia Multimedia Necrotizing enterocolitis 05/16/2011
Necrotizing enterocolitis is the death of intestinal tissue. It most often affects premature or sick babies. Causes, incidence, and risk factors: Necrotizing enterocolitis occurs when the lining of the intestinal wall dies and the tissue falls off. The cause for this disorder is unknown. However, it is thought that a decrease in blood flow to the bowel keeps the bowel from producing mucus that protects the gastrointestinal tract. Bacteria in the intestine may also be a cause.
Health Illustrated Encyclopedia Multimedia Necrotizing granuloma 08/17/2011
Granuloma Causes, incidence, and risk factors: Symptoms: Signs and tests: Treatment: Support Groups: Expectations (prognosis): Complications: Calling your health care provider: Prevention: Review Date: 8/17/2011 Reviewed By: David C.
Health Illustrated Encyclopedia Multimedia Necrotizing soft tissue infection 11/22/2011
Necrotizing fasciitis; Fasciitis - necrotizing; Flesh-eating bacteria; Soft tissue gangrene; Gangrene - soft tissue Causes, incidence, and risk factors: Many different types of bacteria can cause this infection.
Health Illustrated Encyclopedia Multimedia Necrotizing vasculitis 04/20/2013
Vasculitis - necrotizing Causes, incidence, and risk factors: Necrotizing vasculitis is common with: Polyarteritis nodosa Rheumatoid arthritis Scleroderma Systemic lupus erythematosus Granulomatosis with polyangiitis (formerly called Wegener's granulomatosis) It is very rare in children.
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