caseation


Also found in: Dictionary, Wikipedia.
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

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

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.
References in periodicals archive ?
Reactivation tuberculosis is characterized by chronic tissue lesions, the formation of tubercles, caseation, and fibrosis.
Histopathological examination of sinus tract under the magnification of 20 showing the presence of granuloma with no central caseation (arrow)
Caseation within the tubercles is seen in about half the cases and is rarely marked.
This diagnosis was presumed by the presence of necrotizing granulomatous necrosis with caseation with a strongly positive Mantoux test of 25 mm (Figure 3), and later was supported by a marked response to antituberculous medication.
Mycobacterium tuberculosis cultures assisted in definitive decision-making but granulomatous inflammation could not be anticipated when the specimens were initially processed except when visible caseation was encountered.
used the following laparoscopic criteria such as findings of tubercles, caseation, granulomas, beaded tubes, tuboovarian masses, fimbrial agglutination, and hydrosalpinx to suggest TB.
However, histopathology was consistent with acute suppurative pericarditis on top of chronic granulomatous inflammation with Langhans-type giant cells and caseation necrosis, indicative of tuberculous pericarditis with superimposed bacterial pericarditis.
Small discrete anechoic areas, representing zones of caseation, may be seen within the nodes [2].
Instead, a considerable number of ITB cases had biopsies with features of chronic inflammation or granulomas without caseation, a finding consistent with other reports.[sup][8],[9],[10] In addition, multiple target biopsies, deep biopsy, and the culture of the biopsy material might increase the diagnostic yield.[sup][14],[15] Biopsy specimens obtained surgically usually provide confirmative diagnosis, and surgery might be considered in some selected difficult cases.
Microscopic examination showed numerous epithelioid cell granulomas with Langhans giant cells and large areas of caseation necrosis in the pancreas.
Diagnosis of tuberculosis was confirmed on finding typical granulomas comprising of lymphocytes, Langhans type giant cells with or without caseation.
Contrast enhanced CT scan (CECT) of neck showed multiple lymph nodes at level IV on the right side and in the right supraclavicular region showing peripheral rim enhancement with central caseation necrosis (Figures 4, 5, and 6).