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 no problems and are discovered incidentally in the course of testing for an unrelated medical problem.
Large hepatic hemangiomas do occur, can cause symptoms — pain, nausea, or enlargement of the liver — and even rupture (a rare event) causing severe pain and bleeding into the abdomen that can be an emergency.
When a hemangioma is suspected, the challenge for the physician is to be sure that it is in fact a hemangioma and not another type of tumor, particularly a malignant one. Most hepatic hemangiomas need no treatment. If a hepatic hemangioma is large and causing symptoms, it can be surgically removed.
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).
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.
A physician who specializes in diagnosing and treating diseases of the blood.
The diagnosis, treatment, and prevention of diseases of the blood and bone marrow as well as of the immunologic, hemostatic (blood clotting) and vascular systems. Because of the nature of blood, the science of hematology profoundly affects the understanding of many diseases.
The diagnosis, treatment and prevention of blood diseases (hematology) and cancer (oncology) and research into them. Hematology-oncology includes such diseases as iron deficiency anemia, hemophilia, sickle cell disease, the thalassemias, leukemias and lymphomas, as well as cancers of other organs. Abbreviated hem-onc.