Category: L
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Lobar infiltrate
A well-defined site of lung consolidation, seen on the chest radiograph as an area of increased density confined within a specific lobe or segment.
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Low-grade infection
A loosely used term for a subacute or chronic infection with only mild inflammation and without pus formation.
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Local infection
An infection that has not spread but remains contained near the entry site. An infection, such as a pimple or abscess, that is confined to a particular part of the body and appears as a lesion containing pus.
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Lacunar infarction
A small stroke deep within the brain (e.g., in the internal capsule, basal ganglia, thalamus, or pons) caused by damage to or a blockage of a tiny penetrating artery. Lacunar infarctions are associated with a kind of vascular damage caused by chronic high blood pressure called lipohyalinosis. They may be asymptomatic, showing up only on…
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Lenticular process of incus
The long process of the incus, a middle ear ossicle. It articulates with the head of the stapes. The incus is commonly known as the anvil.
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Local immunity
Immunity limited to a given area or tissue of the body.
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Latent image
In radiology, the image within the emulsion of an exposed radiograph that is invisible because it as not been developed. In the realm of visual records, there exists a latent or imperceptible depiction brought forth through the interaction of x-ray or luminous energy with a film’s coating. This enigmatic formation, once subjected to the process…
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Latent hyperopia
Hyperopia in which the error of refraction is overcome and disguised by ciliary muscle action.
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Lunar hymen
A hymen shaped like a crescent moon.
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Labyrinthine hydrops
Excessive fluid in the organ of balance in the inner ear. It may cause pressure or a sense of fullness in the ears, hearing loss, and vertigo. It often is found in Meniere’s disease.