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Ichthyosis Vulgaris
Ichthyosis vulgaris is a common inherited tendency toward dry, thickened, scaly skin. It often affects the shins and lower legs, arms, and…
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Idiopathic Pulmonary Fibrosis
Idiopathic pulmonary fibrosis (IPF) is a long-term lung disease in which scar tissue gradually builds up in the lungs. “Idiopathic” means the…
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Inborn Errors Of Metabolism
Inborn errors of metabolism are a broad group of inherited conditions that affect how the body breaks down, transports, stores, or uses…
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Incisional Hernia
An incisional hernia is a bulge that develops at or near a weakened area of the abdominal wall where an earlier surgery…
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Infectious Colitis
Infectious colitis is inflammation of the colon caused by an infection. Bacteria, viruses or parasites can irritate the colon and lead to…
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Infectious Gastroenteritis
Infectious gastroenteritis is an infection that causes inflammation in the stomach or intestines. It often leads to sudden digestive symptoms such as…
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Infiltrative Cardiomyopathy
Infiltrative cardiomyopathy is a group of heart-muscle conditions in which abnormal material builds up in or between heart cells. The material may…
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Inguinal Hernia
An inguinal hernia occurs when tissue, such as fat or part of the intestine, pushes through a weak area in the lower…
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Innate Immunity Disorders
Innate immunity disorders are a group of conditions that affect the body's early defenses against infection and injury. These defenses include phagocytes,…
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Insomnia
Insomnia is persistent difficulty falling asleep, staying asleep, or waking too early despite having enough opportunity to sleep. It can leave you…
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Insufficient Sleep Syndrome
Insufficient sleep syndrome means regularly getting less sleep than your body needs, often because of personal choices, work, school, or other schedule…
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Insulin Resistance
Insulin resistance means the body's cells do not respond as effectively as they should to insulin. Insulin is a hormone that helps…
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Interstitial Cystitis
Interstitial cystitis, also called bladder pain syndrome, is a chronic condition that causes bladder or pelvic pain along with urinary symptoms. Symptoms…
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Intussusception
Intussusception is a condition in which one section of the intestine slides, or telescopes, into the section next to it. This can…
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Invasive Ductal Carcinoma
Invasive ductal carcinoma is a type of breast cancer that starts in the lining of a milk duct. The word “invasive” means…
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Invasive Lobular Carcinoma
Invasive lobular carcinoma is a type of breast cancer that starts in the milk-producing lobules, the small glands that make breast milk.…
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Irritable Bowel Syndrome
Irritable Bowel Syndrome (IBS) is a common disorder that affects how the digestive system works. It commonly causes recurring abdominal pain along…
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Irritant Contact Dermatitis
Irritant contact dermatitis is skin inflammation caused by direct damage from irritating substances or physical exposures, rather than an immune allergy. It…
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Isosporiasis
Isosporiasis, also called cystoisosporiasis, is an intestinal infection caused by the parasite Cystoisospora belli. It commonly causes watery diarrhea and other digestive…
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Juvenile Idiopathic Arthritis
Juvenile idiopathic arthritis (JIA) is a group of inflammatory arthritis conditions that begin before age 16. It causes ongoing inflammation in one…
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Kawasaki Disease
Kawasaki disease is an uncommon inflammatory illness that affects blood vessels throughout the body. It occurs mainly in young children and can…
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Kidney Cancer
Kidney cancer begins when abnormal cells grow out of control in kidney tissue. Renal cell carcinoma is the most common type in…
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Kidney Disease
Kidney disease is a broad term for damage or reduced function in one or both kidneys. Healthy kidneys filter waste and extra…
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Kidney Stones
Kidney stones are hard deposits made of minerals and salts that form inside the kidneys. A stone may stay in the kidney…
