The granuloma is characterized by
Focal accumulation of activated macrophages
Collection of neutrophils
Newly formed vessels
Collection of eosinophils
Granulomatous inflammation is a distinctive pattern of chronic inflammation characterized by aggregates of activated macrophages with scattered lymphocytes granuloma:-is an aggregation of macrophages surrounded by a collar of mononuclear cells principally lymphocytes Macrophages may get activated to form epithelioid cells Some of the cells may fuse together to form a bigger cell called a giant cell Older granulomas may have a rim of fibroblasts and connective tissue Common conditions resulting in granuloma formation with impoant features Tuberculosis Sarcoidosis (Non-caseating granuloma) Brucellosis Cat scratch disease (Stellate shaped or round granuloma) Syphilis (Gumma) Leprosy Inflammatory bowel disease ref pathology robbins 9th ed page 56
General pathology