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Hyperoxia
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D018496 |
[An abnormal increase in the amount of oxygen in the tissues and organs.
] |
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Hyperparathyroidism
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D006961 |
[A condition of abnormally elevated output of PARATHYROID HORMONE (or PTH) triggering responses that increase blood CALCIUM. It is characterized by HYPERCALCEMIA and BONE RESORPTION, eventually leading to bone diseases. PRIMARY HYPERPARATHYROIDISM is caused by parathyroid HYPERPLASIA or PARATHYROID NEOPLASMS. SECONDARY HYPERPARATHYROIDISM is increased PTH secretion in response to HYPOCALCEMIA, usually caused by chronic KIDNEY DISEASES.
] |
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Hyperparathyroidism, Primary
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D049950 |
[A condition of abnormally elevated output of PARATHYROID HORMONE due to parathyroid HYPERPLASIA or PARATHYROID NEOPLASMS. It is characterized by the combination of HYPERCALCEMIA, phosphaturia, elevated renal 1,25-DIHYDROXYVITAMIN D3 synthesis, and increased BONE RESORPTION.
] |
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Hyperparathyroidism, Secondary
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D006962 |
[Abnormally elevated PARATHYROID HORMONE secretion as a response to HYPOCALCEMIA. It is caused by chronic KIDNEY FAILURE or other abnormalities in the controls of bone and mineral metabolism, leading to various BONE DISEASES, such as RENAL OSTEODYSTROPHY.
] |
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Hyperphagia
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D006963 |
[Ingestion of a greater than optimal quantity of food.
] |
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Hyperphosphatemia
|
D054559 |
[A condition of abnormally high level of PHOSPHATES in the blood, usually significantly above the normal range of 0.84-1.58 mmol per liter of serum.
] |
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Hyperpigmentation
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D017495 |
[Excessive pigmentation of the skin, usually as a result of increased epidermal or dermal melanin pigmentation, hypermelanosis. Hyperpigmentation can be localized or generalized. The condition may arise from exposure to light, chemicals or other substances, or from a primary metabolic imbalance.
] |
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Hyperpituitarism
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D006964 |
[Disease of the glandular, anterior portion of the pituitary (PITUITARY GLAND, ANTERIOR) resulting in hypersecretion of ADENOHYPOPHYSEAL HORMONES such as GROWTH HORMONE; PROLACTIN; THYROTROPIN; LUTEINIZING HORMONE; FOLLICLE STIMULATING HORMONE ; and ADRENOCORTICOTROPIC HORMONE. Hyperpituitarism usually is caused by a functional ADENOMA.
] |
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Hyperplasia
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D006965 |
[An increase in the number of cells in a tissue or organ without tumor formation. It differs from HYPERTROPHY, which is an increase in bulk without an increase in the number of cells.
] |
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Hyperpolarization-Activated Cyclic Nucleotide-Gated Channels
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D064428 |
[A subgroup of cyclic nucleotide-regulated ION CHANNELS of the superfamily of pore-loop cation channels that are opened by hyperpolarization rather than depolarization. The ion conducting pore passes SODIUM, CALCIUM, and POTASSIUM cations with a preference for potassium.
] |
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Hyperprolactinemia
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D006966 |
[Increased levels of PROLACTIN in the BLOOD, which may be associated with AMENORRHEA and GALACTORRHEA. Relatively common etiologies include PROLACTINOMA, medication effect, KIDNEY FAILURE, granulomatous diseases of the PITUITARY GLAND, and disorders which interfere with the hypothalamic inhibition of prolactin release. Ectopic (non-pituitary) production of prolactin may also occur. (From Joynt, Clinical Neurology, 1992, Ch36, pp77-8)
] |
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Hypersensitivity
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D006967 |
[Altered reactivity to an antigen, which can result in pathologic reactions upon subsequent exposure to that particular antigen.
] |
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Hypersensitivity, Delayed
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D006968 |
[An increased reactivity to specific antigens mediated not by antibodies but by cells.
] |
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Hypersensitivity, Immediate
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D006969 |
[Hypersensitivity reactions which occur within minutes of exposure to challenging antigen due to the release of histamine which follows the antigen-antibody reaction and causes smooth muscle contraction and increased vascular permeability.
] |
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Hyperspectral Imaging
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D000081862 |
[The use of SPECTROMETRY measurements (of radiance, reflectance, optical scattering, absorption, etc.) made for each point of an image, across the whole spectrum of a selected spectral range such as infrared, visual, ultraviolet, or X-rays. Hyperspectral images are analyzed to determine the make up and location of specific chemical compounds in the objects being imaged.
] |
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Hypersplenism
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D006971 |
[Condition characterized by splenomegaly, some reduction in the number of circulating blood cells in the presence of a normal or hyperactive bone marrow, and the potential for reversal by splenectomy.
] |
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Hypertelorism
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D006972 |
[Abnormal increase in the interorbital distance due to overdevelopment of the lesser wings of the sphenoid.
] |
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Hypertension
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D006973 |
[Persistently high systemic arterial BLOOD PRESSURE. Based on multiple readings (BLOOD PRESSURE DETERMINATION), hypertension is currently defined as when SYSTOLIC PRESSURE is consistently greater than 140 mm Hg or when DIASTOLIC PRESSURE is consistently 90 mm Hg or more.
] |
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Hypertension, Malignant
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D006974 |
[A condition of markedly elevated BLOOD PRESSURE with DIASTOLIC PRESSURE usually greater than 120 mm Hg. Malignant hypertension is characterized by widespread vascular damage, PAPILLEDEMA, retinopathy, HYPERTENSIVE ENCEPHALOPATHY, and renal dysfunction.
] |
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Hypertension, Portal
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D006975 |
[Liver cirrhosis with intrahepatic portal obstruction, HYPERTENSION, and patent UMBILICAL VEINS.
, Abnormal increase of resistance to blood flow within the hepatic PORTAL SYSTEM, frequently seen in LIVER CIRRHOSIS and conditions with obstruction of the PORTAL VEIN.
] |
