Granulomatous Pneumonia

Granulomatous mycotic pneumonia (Image sourced from Bristol Biomed Image Archive with permission)

• Variable number and distribution of caseous or non-caseous granulomas throughout the lung
• Must be distinguished from neoplasms
• Calcification may occur
• Caused by agents resistant to phagocytosis, mostly fungi, Mycobacterium bovis, Rhodococcus equi, foreign material, FIP
• Micro: centre of necrotic tissue surrounded by macrophages, connective tissue and lymphocytes