granuloma (English) - Medical terminology for medical students -

An organized collection of macrophages formed during inflammation found in many diseases. They form when the immune system attempts to wall off substances it perceives as foreign but is unable to eliminate. Such substances include infectious organisms (e.g. bacteria, fungi), foreign objects, keratin, and suture fragments etc.

(Diseases with granulomas)
● tuberculosis
● leprosy
● schistosomiasis
● histoplasmosis
● cryptococcosis
● cat-scratch disease
● rheumatic Fever
● Sarcoidosis
● Crohn's disease
● Listeria monocytogenes
● Leishmania spp
● pneumocystis pneumonia
● aspiration pneumonia
● rheumatoid arthritis
● granuloma annulare
● foreign-body granuloma
● childhood granulomatous periorificial dermatitis

It usually resolves through organization with scar formation. But caseous masses never resolve, but become calcified and surrounded with connective tissue (incapsulation).