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mycobacterial gastritis

Thursday 23 February 2012

In patients with disseminated tuberculosis, necrotizing granulomas identical to those found in other locations may be found in the gastric mucosa.

Another mycobacterium that has gained prominence with the spread of acquired immunodeficiency syndrome (AIDS) is Mycobacterium avium-intracellulare.

The stomach is rarely involved; when it is, the typical lesions consist of accumulations of foamy histiocytes in the lamina propria, sometimes with formation of illdefined granulomas without necrosis.

Staining for acid-fast bacilli reveals large numbers of positive microorganisms both within the histiocytes and extracellularly, in the stroma.