Category: H
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Hochsinger’s sign
Closure of the fist in tetany when the inner side of the biceps muscle is pressed.
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Hitting bottom
A colloquial term for reaching the lowest limits of depression or depravity. The term is often used by addicts in support groups to describe the depths to which their addiction has taken them.
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Hitchhiker’s thumb
A hyperextended thumb or the ability to extend the distal interphalangeal joint of the thumb more than 45 degrees. It is an autosomally inherited trait.
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Histozyme
A renal enzyme that converts hippuric acid into benzoic acid and glycine, causing fermentation.
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Histozoic
Living within or on tissues, said of certain protozoan parasites.
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Histotropic
Having attraction for tissue cells, as certain parasites, stains, or chemicals.
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Histo spots
Scarring of the macula found in patients infected with Histoplasma capsulatum, a fungus that is endemic in the Ohio and Mississippi river valleys.
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Historical control
In a research study a person or group of persons who were treated in the past and who provide contrast and comparison to participants currently being studied. Because a wide variety of variables may change over time, the use of historical controls as opposed to a contemporary control group is often an indication that an…
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Histoplasma capsulatum
The causative agent of histoplasmosis.
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Histophysiology
The study of the functions of cells and tissues.