caseation


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Related to caseation: tuberculosis, caseation necrosis

caseation

 [ka″se-a´shun]
1. the precipitation of casein.
2. a form of necrosis in which tissue is changed into a dry, amorphous mass resembling cheese. Called also caseous degeneration or necrosis.

ca·se·a·tion

(kā'sē-ā'shŭn),
A form of coagulation necrosis in which the necrotic tissue resembles cheese and contains a mixture of protein and fat that is absorbed very slowly; occurs particularly in tuberculosis.
See also: caseous necrosis.
Synonym(s): tyrosis (2)
[L. caseus, cheese]

caseation

/ca·se·a·tion/ (ka″se-a´shun)
1. the precipitation of casein.
2. necrosis in which tissue is changed into a dry mass resembling cheese.

caseation

(kā′sē-ā′shən)
n.
Necrotic degeneration of bodily tissue into a soft, cheeselike substance.

caseation

[kā′sē·ā′shən]
Etymology: L, caseus, cheese
a form of tissue necrosis in which cellular outline is lost and the appearance is that of crumbly or liquified cheese. It is typical of tuberculosis. See also caseous. caseate, v.

tyrosis

An obsolete term for:
(1) Caseation (necrosis); 
(2) Precipitation of casein (the phosphoprotein family found in mammalian milk);
(3) Vomiting of milk curds by infants; popularly, “spit up”.

ca·se·a·tion

(kā'sē-ā'shŭn)
A form of coagulation necrosis in which the necrotic tissue resembles cheese and contains a mixture of protein and fat that is absorbed very slowly; occurs particularly in tuberculosis.
See also: caseous necrosis
[L. caseus, cheese]

caseation

Degeneration of dead tissue into a cheese like material. Caseation was a common feature of TUBERCULOSIS of the lungs and led to cavity formation. Also known as caseous degeneration.

caseation

coagulation necrosis characteristic of tuberculous lesions

caseation

1. the precipitation of casein.
2. a form of necrosis in which tissue is changed into a dry, amorphous mass resembling cheese.
References in periodicals archive ?
We recommend that when granulomatous inflammation is suspected, or when visible caseation is encountered surgically, the sample should also be submitted in appropriate medium for processing in the microbiology laboratory for MTB culture studies in addition to histopathological review.
If ZN staining is not done, the thin caseation commonly present in these cases can be mistaken for pus, and the case wrongly labeled as pyogenic lymphadenitis.
16 The two histological features which specifically point towards the diagnosis of tuberculosis are variation in the size of the granulomata and the presence of caseation necrosis.
Both USG and CT scan show number and extent of cervical lymph nodes, central caseation necrosis, matted lymph nodes, IJV invasion, and IJV thrombus.
Caseation is usually absent, but there may be central fibrinoid necrosis.
The nodes are usually matted together with hypodense centers which probably is due to caseation and many occasionally contain calcification1314.
4) Hip infection is similar to progression in lungs with chronic granulomatous inflammation and caseation necrosis.
Granulomatous inflammation with caseation was the commonest finding, seen in all cases corresponding to strictures and ulceration on gross examination.
Caseation and demonstration of acid fast bacilli on cytology are almost always suggestive of tuberculous aetiology but problems arise when cytological evidences are inconclusive (for example, poorly-formed granuloma, neutrophilic infiltration, absence of acid fast bailli, etc.
Histological analysis of fast frozen section demonstrated a chronic granulomatous inflammation with caseation, a character of tuberculosis.
2,4,5) On ultrasound three morphologic forms of BTb are known (6) and they are the nodular pattern which may be mistaken for a fibroadenoma or carcinoma (12) (10), diffuse form that results in caseation and sinus formation, and a sclerosing form which manifests as dense, fibrotic breast tissue and is slow growing in the absence of any suppuration.