Epithelioid granuloma is seen in all except
Examples of Diseases with Granulomatous Inflammations
a. Tuberculosis Mycobacterium tuberculosis Noncaseating tubercle (granuloma prototype): a focus of epithelioid cells, rimmed by fibroblasts, lymphocytes, histiocytes, occasional Langhans giant cell; caseating tubercle: central amorphous granular debris, loss of all cellular detail; acid-fast bacilli
b. Leprosy Mycobacterium leprae Acid-fast bacilli in macrophages; non-caseating granulomas
c. Syphilis Treponema pallidum Gumma: microscopic to grossly visible lesion, enclosing wall of histiocytes; plasma cell infiltrate; central cells are necrotic without loss of cellular outline
d. Cat-scratch disease Gram-negative bacillus Rounded or stellate granuloma containing central granular debris and recognizable neutrophils; giant cells RARE.