List of articles in "Disease" category - Page 498

An insulinoma is a tumor of the pancreas that is derived from beta cells and secretes insulin. Beta cells secrete insulin in response to increases in blood glucose. The resulting […]

Photodermatitis sometimes referred to as sun poisoning or photoallergy is a form of allergic contact dermatitis in which the allergen must be activated by light to sensitize the allergic response […]

Thrombocytosis (or thrombocythemia) is the presence of high platelet counts in the blood and can be either primary (also termed essential and caused by a myeloproliferative disease) or reactive (also […]

Leukocytosis is a white blood cell count (the leukocyte count) above the normal range in the blood. It is frequently a sign of an inflammatory response most commonly the result […]

An aortic aneurysm is a general term for an enlargement (dilation) of the aorta to greater than 1.5 times normal size. While the cause of an aneurysm may be multifactorial […]

Opioid dependence is a medical diagnosis characterized by an individual’s inability to stop using opiates (morphine heroin codeine oxycodone hydrocodone etc.) even when objectively it is in his or her […]

Blepharitis (/blɛfərˈaɪtɨs/ BLEF-ər-EYE-tis) is an eye condition characterized by chronic inflammation of the eyelid the severity and time course of which can vary. Onset can be acute resolving without treatment […]

Niemann–Pick disease (/niːmənˈpɪk/ nee-mən-PIK) refers to a group of inherited severe metabolic disorders that allow sphingomyelin to accumulate in lysosomes which are organelles in animal cells. The severe form is […]

A vasovagal episode or vasovagal response or vasovagal attack (also called neurocardiogenic syncope) is a malaise mediated by the vagus nerve. When it leads to syncope or fainting it is […]

A demyelinating disease is any disease of the nervous system in which the myelin sheath of neurons is damaged. This damage impairs the conduction of signals in the affected nerves. […]