Conditions
Uric Acid Stones
Uric acid stones are a type of kidney stone that forms when there is too much uric acid in your urine, or your urine…
Macular Pucker
Macular pucker, also known as an epiretinal membrane, is a common eye condition where a thin layer of scar tissue forms on the macula.…
Macular Hole
A macular hole is a small break that forms in the macula, which is the central part of the light-sensitive tissue at the back…
MALT Lymphoma
MALT lymphoma is a slow-growing type of cancer that starts in certain immune cells (B-cells) found in the lining of organs like the stomach,…
MAC Lung Disease
MAC lung disease is a lung infection caused by common environmental bacteria called Mycobacterium avium complex (MAC). These bacteria are part of a larger…
Lymphoproliferative Disorders
Lymphoproliferative disorders are a group of conditions where your body makes too many white blood cells called lymphocytes. These cells are part of your…
Lymphocytic Colitis
Lymphocytic colitis is a type of microscopic colitis, an inflammation of the large intestine (colon) that is not visible during a standard colonoscopy. Instead,…
Silent Sinus Syndrome
Silent Sinus Syndrome is a rare condition where one of the air-filled spaces behind your cheekbone (maxillary sinus) spontaneously shrinks. This happens without typical…
Median Arcuate Ligament Syndrome
Median arcuate ligament syndrome (MALS) is a rare condition where a band of tissue, called the median arcuate ligament, presses on the celiac artery.…
Mantle Cell Lymphoma
Mantle cell lymphoma (MCL) is a rare and aggressive type of non-Hodgkin lymphoma, a cancer that starts in white blood cells called B-lymphocytes. It…
Malignant Hyperthermia
Malignant hyperthermia (MH) is a rare, inherited condition that causes a severe reaction to certain anesthesia medications used during surgery. It leads to a…
Mal de Debarquement Syndrome
Mal de Debarquement Syndrome (MdDS) is a rare condition where you feel a persistent sensation of motion, like rocking, swaying, or bobbing, even when…
Oropharyngeal Cancer
Oropharyngeal cancer is a type of cancer that develops in the middle part of your throat, called the oropharynx. This area includes your tonsils,…
Optic Neuritis
Optic neuritis is an inflammation of the optic nerve, the bundle of nerve fibers that sends visual information from your eye to your brain.…
Open-Angle Glaucoma
Open-angle glaucoma is a common eye condition that slowly damages your optic nerve, which connects your eye to your brain. This damage often happens…
Oligohydramnios
Oligohydramnios is a condition where there is too little amniotic fluid surrounding a baby during pregnancy. This fluid is vital for the baby's protection,…
Ogilvie Syndrome
Ogilvie Syndrome, also known as acute colonic pseudo-obstruction, is a rare but serious condition where the large intestine (colon) becomes significantly widened (dilated) without…
Ocular Rosacea
Ocular rosacea is an inflammatory condition that affects the eyes, often occurring in people who have rosacea, a common skin condition. It causes symptoms…
Normocytic Anemia
Normocytic anemia is a type of anemia where your red blood cells are normal in size, but you don't have enough of them. Red…
Neuromyelitis Optica
Neuromyelitis optica (NMO) is a rare, lifelong autoimmune disease where your body's immune system mistakenly attacks healthy cells in your central nervous system. It…
Neurofibromatosis Type 1
Neurofibromatosis type 1 (NF1) is a genetic disorder that causes tumors to grow on nerves throughout the body. These tumors are usually noncancerous (benign).…
Neurofibromatosis
Neurofibromatosis (NF) is a group of three genetic conditions that cause tumors to grow on nerves. These tumors are usually non-cancerous (benign) but can…
Neuroblastoma
Neuroblastoma is a rare cancer that starts in early nerve cells (neuroblasts), usually in infants and young children. It often begins in the adrenal…
Nephrotic Syndrome
Nephrotic syndrome is a kidney disorder where your kidneys let too much protein pass into your urine. This happens because the tiny filters in…