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Hemangioma
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D006391 |
[A vascular anomaly due to proliferation of blood or lymphatic vessels that forms a tumor-like mass. Vessels in the angioma may or may not be dilated.
, A vascular anomaly due to proliferation of BLOOD VESSELS that forms a tumor-like mass. The common types involve CAPILLARIES and VEINS. It can occur anywhere in the body but is most frequently noticed in the SKIN and SUBCUTANEOUS TISSUE. (from Stedman, 27th ed, 2000)
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Hemangioma, Capillary
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D018324 |
[A dull red, firm, dome-shaped hemangioma, sharply demarcated from surrounding skin, usually located on the head and neck, which grows rapidly and generally undergoes regression and involution without scarring. It is caused by proliferation of immature capillary vessels in active stroma, and is usually present at birth or occurs within the first two or three months of life. (Dorland, 27th ed)
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Hemangioma, Cavernous
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D006392 |
[A vascular anomaly that is a collection of tortuous BLOOD VESSELS and connective tissue. This tumor-like mass with the large vascular space is filled with blood and usually appears as a strawberry-like lesion in the subcutaneous areas of the face, extremities, or other regions of the body including the central nervous system.
, A tumor-like mass with large vascular space that is filled with blood or lymph.
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Hemangioma, Cavernous, Central Nervous System
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D020786 |
[A vascular anomaly composed of a collection of large, thin walled tortuous VEINS that can occur in any part of the central nervous system but lack intervening nervous tissue. Familial occurrence is common and has been associated with a number of genes mapped to 7q, 7p and 3q. Clinical features include SEIZURES; HEADACHE; STROKE; and progressive neurological deficit.
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Hemangiopericytoma
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D006393 |
[A tumor composed of spindle cells with a rich vascular network, which apparently arises from pericytes, cells of smooth muscle origin that lie around small vessels. Benign and malignant hemangiopericytomas exist, and the rarity of these lesions has led to considerable confusion in distinguishing between benign and malignant variants. (From Dorland, 27th ed; DeVita Jr et al., Cancer: Principles & Practice of Oncology, 3d ed, p1364)
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Hemangiosarcoma
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D006394 |
[A rare malignant neoplasm characterized by rapidly proliferating, extensively infiltrating, anaplastic cells derived from blood vessels and lining irregular blood-filled or lumpy spaces. (Stedman, 25th ed)
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Hemarthrosis
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D006395 |
[Bleeding into the joints. It may arise from trauma or spontaneously in patients with hemophilia.
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Hematemesis
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D006396 |
[Vomiting of blood that is either fresh bright red, or older "coffee-ground" in character. It generally indicates bleeding of the UPPER GASTROINTESTINAL TRACT.
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Hematinics
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D006397 |
[Agents which improve the quality of the blood, increasing the hemoglobin level and the number of erythrocytes. They are used in the treatment of anemias.
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Hematocele
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D006398 |
[Hemorrhage into a canal or cavity of the body, such as the space covered by the serous membrane (tunica vaginalis) around the TESTIS leading to testicular hematocele or scrotal hematocele.
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Hematocolpos
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D006399 |
[A blood-filled VAGINA that is obstructed.
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Hematocrit
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D006400 |
[The volume of packed RED BLOOD CELLS in a blood specimen. The volume is measured by centrifugation in a tube with graduated markings, or with automated blood cell counters. It is an indicator of erythrocyte status in disease. For example, ANEMIA shows a low value; POLYCYTHEMIA, a high value.
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Hematologic Agents
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D006401 |
[Drugs that act on blood and blood-forming organs and those that affect the hemostatic system.
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Hematologic Diseases
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D006402 |
[Disorders of the blood and blood forming tissues.
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Hematologic Neoplasms
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D019337 |
[Neoplasms located in the blood and blood-forming tissue (the bone marrow and lymphatic tissue). The commonest forms are the various types of LEUKEMIA, of LYMPHOMA, and of the progressive, life-threatening forms of the MYELODYSPLASTIC SYNDROMES.
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Hematologic Tests
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D006403 |
[Tests used in the analysis of the hemic system.
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Hematology
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D006405 |
[A subspecialty of internal medicine concerned with morphology, physiology, and pathology of the blood and blood-forming tissues.
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Hematoma
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D006406 |
[A collection of blood outside the BLOOD VESSELS. Hematoma can be localized in an organ, space, or tissue.
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Hematoma, Epidural, Cranial
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D006407 |
[Accumulation of blood in the EPIDURAL SPACE between the SKULL and the DURA MATER, often as a result of bleeding from the MENINGEAL ARTERIES associated with a temporal or parietal bone fracture. Epidural hematoma tends to expand rapidly, compressing the dura and underlying brain. Clinical features may include HEADACHE; VOMITING; HEMIPARESIS; and impaired mental function.
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Hematoma, Epidural, Spinal
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D046748 |
[A rare epidural hematoma in the spinal epidural space, usually due to a vascular malformation (CENTRAL NERVOUS SYSTEM VASCULAR MALFORMATIONS) or TRAUMA. Spontaneous spinal epidural hematoma is a neurologic emergency due to a rapidly evolving compressive MYELOPATHY.
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