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Sarcoidosis is a disease of unknown cause characterized by non-necrotizing ("non-caseating") granulomas in multiple organs and body sites, [12] most commonly the lungs and lymph nodes within the chest cavity. Other common sites of involvement include the liver, spleen, skin, and eyes.
Caseous necrosis in the kidney. In caseous necrosis no histological architecture is preserved (unlike with coagulative necrosis). [5] [6] On microscopic examination with H&E staining, the area is acellular, characterised by amorphous, roughly granular eosinophilic debris of now dead cells, [6] also containing interspearsed haematoxyphilic remnants of cell nucleus contents. [5]
The characteristic morphological element is the tuberculous granuloma (caseating tubercule): giant multinucleated cells (Langhans cells), surrounded by epithelioid cells aggregates, T cell lymphocytes and few fibroblasts. Granulomatous tubercules evolve to central caseous necrosis and tend to become confluent, replacing the lymphoid tissue.
The classical histologic pattern of scrofula features caseating granulomas with central acellular necrosis (caseous necrosis) surrounded by granulomatous inflammation with multinucleated giant cells. Although tuberculous and non tuberculosis lymphadenitis are morphologically identical, the pattern is somewhat distinct from other causes of ...
Idiopathic granulomatous mastitis (IGM) is defined as granulomatous mastitis without any other attributable cause such as those above mentioned. It occurs on average two years and, almost exclusively, up to six years after pregnancy, usual age range is 17 to 42 years. Some cases have been reported that were related to drug induced ...
M. tuberculosis is characterized in tissue by caseating granulomas containing Langhans giant cells, ... This can cause blood in urine if the kidneys are affected, and ...
Intestinal tuberculosis can cause symptoms such as fever, night sweats, and ulcers in the transverse colon, along with a swollen ileocecal valve. Key tissue changes include granulomas, which may be caseating, confluent, or large.
Granulation tissue with a poorly formed granuloma to the left of centre. Within this area there is a multinucleate giant cell of the Langhans type. The patient had a healing mycobacterial infection of the skin (Mycobacterium ulcerans infection). Langhans giant cells (LGC) are giant cells found in granulomatous conditions.