Hemangioma
A benign tumor formed by a collection of excess blood vessels. A hemangioma may be visible through the skin as a birthmark, known colloquially as a ‘strawberry mark.’ Most hemangiomas that occur at birth disappear after a few months or years.
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- Hemangioma, capillary
A type of hemangioma (a benign tumor formed by a collection of excess blood vessels) that is composed almost entirely of tiny capillary vessels. Capillary hemangiomas may be located anywhere on the body but they are most common on the face, scalp, back, and chest. They may be evident at birth or become noticeable several […]
- Hemangioma, cavernous
A type of hemangioma composed of blood-filled ‘lakes’ and channels. A cavernous henangioma is raised and red or purplish. Small cavernous hemangiomas on the surface of the body may be removed or treated by electrocoagulation. Surgery is sometimes needed.
- Hemangioma, hepatic
A common benign tumor of the liver made up of small blood vessels. Hepatic hemangioma is the most common benign liver tumor and is 4-6 times more common in women than men (female hormones may promote its formation and growth). These tumors are usually small, a quarter inch (less than 1 cm) in diameter, cause […]
- Hematochezia
Bright red blood in the stool, usually from the lower gastrointestinal tract — the colon or rectum — or from hemorrhoids. The term “hematochezia” is rarely used. “Bright red blood in the stool” is more widely used (and understood).
- Hematocrit
38-46% These values may vary slightly between laboratories. The term “hematocrit” was coined in 1903 and comes from the Greek roots hemat-, blood + krites, judge = to judge or gauge the blood. The abbreviation for hematocrit is hct. In medical slang the hematocrit is called the crit.