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Amyloid shows up as homogeneous pink material in lamina propria and around blood vessels. 20× magnification. Amyloids are aggregates of proteins characterised by a fibrillar morphology of typically 7–13 nm in diameter , a β-sheet secondary structure (known as cross-β) and ability to be stained by particular dyes, such as Congo red . [ 1 ]
Amyloid plaques naturally occur in the aging brains of nonhuman species ranging from birds to great apes. [4] In nonhuman primates, which are the closest biological relatives of humans, plaques have been found in all species examined thus far. [ 47 ]
Amyloid deposits in tissue can cause enlargement of structures. Twenty percent of people with AL amyloidosis have an enlarged tongue, that can lead to obstructive sleep apnea, difficulty swallowing, and altered taste. [11] Tongue enlargement does not occur in ATTR or AA amyloidosis. [10] Deposition of amyloid in the throat can cause hoarseness ...
Amyloid light-chain (AL) amyloidosis, also known as primary amyloidosis, is the most common form of systemic amyloidosis. [1] The disease is caused when a person's antibody -producing cells do not function properly and produce abnormal protein fibers made of components of antibodies called light chains .
Buerger's test (assessment of arterial sufficiency): With the patient supine, note the colour of the feet soles. They should be pink. Then elevate both legs to 45 degrees for more than 1 minute. Observe the soles. If there is marked pallor (whiteness), ischemia should be suspected. Next check for rubor of dependency.
20219 Ensembl ENSG00000132703 ENSMUSG00000026542 UniProt P02743 P12246 RefSeq (mRNA) NM_001639 NM_011318 RefSeq (protein) NP_001630 NP_035448 Location (UCSC) Chr 1: 159.59 – 159.59 Mb Chr 1: 172.72 – 172.72 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse The serum amyloid P component (SAP) is the identical serum form of the amyloid P component (AP), a 25 kDa pentameric protein ...
The ABI is a simple, non-invasive test that measures the ratio of systolic blood pressure in the ankle to the systolic blood pressure in the upper arm. This is based on the idea that if blood pressure readings in the ankle are lower than those in the arm, a blockage in the arteries that provide blood from the heart to the ankle is suspected. [55]
Increased blood pressure in the veins (venous hypertension) can cause diffusion of substances, including fibrin, out of capillaries. Fibrotic tissue may predispose the tissue to ulceration. Recurrent ulceration and fat necrosis is associated with lipodermatosclerosis. In advanced lipodermatosclerosis the proximal leg swells from chronic venous ...
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