Author: Glossary
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Denture ulcer
An ulcer of the oral mucosa caused by irritation from wearing dentures.
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Chronic leg ulcer
Any longstanding, slowly healing ulcer of a lower extremity, especially one caused by occlusive disease of the arteries or veins or by varicose veins.
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Amputating ulcer
An ulcer that destroys tissue to the bone by encircling the part. An encompassing, deep ulcer, such as one around a toe, which can ultimately result in the total loss of the affected part, as observed in the disease yaws.
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Uhthoff’s sign
The transient decrease in vision, double vision, or nystagmus when body temperature rises; seen in patients with multiple sclerosis.
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Tzanck cell
A degenerated cell from the keratin layer of the skin, disconnected from adjacent cells. It is seen in pemphigus.
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Tyvelose
A carbohydrate, 3-6-dideoxy-D-mannose, derived from certain strains of Salmonella and Trichinella.
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Tyrosyluria
Increased tyrosine-derived products in the urine.
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Tyroglyphus
A genus of sarcoptoid mites commonly known as cheese mites. They infest cheese and dried vegetable food products and occasionally infest humans, causing pruritus. This genus includes species that cause grocer’s itch, vanillism, and copra itch.
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Tyrogenous
Having origin in or produced by cheese.
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Typoscope
A reading aid device for patients with amblyopia or cataract.