Morphologic Patterns of Inflammation

Site of serous inflammation

________: spaces created by cell injury or into body cavities lined by the peritoneum, pleura, or pericardium.

Site of catarrhal inflammation

mucous membranes

Example of catarrhal inflammation

common cold (rhinovirus), influenza

Gross appearance of catarrhal inflammation

congestion, edema, mucus secretion

Examples of serous inflammation

skin blister (burn), pleural effusion (pleurisy)

Gross appearance of serous inflammation

congested surface, watery effusion

Site of fibrinous inflammation

lining of body cavities, (meninges, pericardium, and pleura)

Example of fibrinous inflammation

serosal surfaces (fibrinous pericarditis)

Example of hemorrhagic inflammation

severe capillary damage (anthrax, plague)

Example of membranous/pseudo-membranous Inflammation

diphtheritic pharyngitis, bacillary dysentery

Gross appearance of membranous/pseudo-membranous Inflammation

greyish membrane on mucosal surface

Example of necrotizing (gangrenous) inflammation

gangrenous acute appendicitis, gangrene of the foot

Example of allergic inflammation

bronchial asthma

pus

fluid, necrotic cells, and pus cells (dead neutrophils)

Organisms of localized acute suppurative inflammation

pyogenic bacteria (Staphylococcus aureus)

Cellulitis

diffuse suppurative inflammation

Site of diffuse acute suppurative inflammation

subcutaneous tissue (orbit, pelvis, scrotum, mediastinum)

Organisms that can cause cellulitis

Streptococcus hemolyticus

Example of diffuse non-specific inflammation

chronic pyelonephritis, chronic cholecystitis

Example of caseating granulomatous inflammation

Tuberculosis

Example of non-caseating granulomatous inflammation

leprosy, syphilis, schistosomiasis, sarcoidosis and foreign body granuloma