Acute inflammation Formation of acute inflammatory exudate From
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Acute inflammation
Formation of acute inflammatory exudate From: Stevens A. J Lowe J. Pathology. Mosby 1995 Chemical mediators acting on nearby blood vessels from inflammatory focus Fig. 5. 1.
Vasodilation and increased permiability Fig. 5. 2.
Neutrophils margination and emigration Fig. 5. 3.
Neutrophil margination, emigration and emigration in acute inflammation From: Stevens A. J Lowe J. Pathology. Mosby 1995 Neutrophil margination, emigration and emigration in acute inflammation Fig. 5. 4.
Neutrophil margination and emigration in acute inflammation Fig. 5. 5.
Neutrophil margination, emigration and emigration in acute inflammation Fig. 5. 6.
Neutropil phagocytosis From: Stevens A. J Lowe J. Pathology. Mosby 1995 Fig. 5. 7.
Mechanisms involved in inflammation-From: Stevens A. J Lowe J. Pathology. Mosby 1995 Fig. 5. 8.
Acute serous inflammation From: Stevens A. J Lowe J. Pathology. Mosby 1995 Acute amigdalitis Fig. 5. 9.
Herpetic inflammation Fig. 5. 10.
Serous alveolitis From cases of the Pathology Department U. M. F. “Gr. T. Popa” Iasi Fig. 5. 11.
Fig. 5. 12. Serous alveolitis: (1) Alveolar walls (congestion of parieto-alveolar capillaries); (2) Alveolar lumen: serous exudate.
Fibrinous inflammation From cases of the Pathology Department U. M. F. “Gr. T. Popa” Iasi Mallory staining Fig. 5. 13.
Mallory staining Fibrinous alveolitis: (1) alveolar walls (congestion of parieto-alveolar capillaries); (2) alveolar lumen: fibrinous exudate. Fig. 5. 14.
Fibrinous pericarditis From: Stevens A. J Lowe J. Pathology. Mosby 1995 Fig. 5. 15. Fibrinous deposits on parietal pericardium
Fibrinous pericarditis: (1) Epicardium is covered by fibrinous exudate forming intense eosinophilic fibrin network; (2) Epicardium with vascular congestion and neutrophils. From cases of the Pathology Department U. M. F. “Gr. T. Popa” Iasi Fig. 5. 16.
Acute purulent inflammation Fig. 5. 17. Pus smear (May Grunwald Giemsa) Purulent exudate (pus) is composed of: neutrophiles; macrophages; eritrocytes; necrotic debris; fibrin; bacteria.
Fig. 5. 18. Pus smear (MGG) From cases of the Pathology Department - U. M. F. “Gr. T. Popa” Iasi
Acute diffuse purulent inflammation From: Stevens A. J Lowe J. Pathology. Mosby 1995 Fig. 5. 19. Purulent leptomeningitis
Fig. 5. 20. HE staining Purulent leptomeningitis: (1) meninges is diffusely thickened by purulent exudate and vascular congestion. (2) - congested vessels (leukocyte margination and diapedesis). From cases of the Pathology Department - U. M. F. “Gr. T. Popa” Iasi
HE staining Vascular congestion and leukocyte diapedesis Fig. 5. 21.
HE staining Fig. 5. 22. Leukocyte margination and diapedesis From cases of the Pathology Department - U. M. F. “Gr. T. Popa
Acute localised purulent inflammation Lung acute and chronic abscesses From: Stevens A. J Lowe J. Pathology. Mosby 1995 Fig. 5. 23.
Pulmonary abscess From: Stevens A. J Lowe J. Pathology. Mosby 1995 Fig. 5. 24. Pulmonary abscess: (1) the cavity: contains a suppurative material and air content (in case of communication with air conducts); (2) wall: (a) acute abscess – the wall has irregular borders reprezented by suppurative necrotic lung parenchyma; (b) chronic abscess - the wall is a pyogenic membrane that becomes fibrotic by connective organization.
Localised purulent inflammation (abscess) • • Abscess: – Localized purulent Inflammation; Types – acute / recent – chronic Recent cerebral abscess • center: – purulent exudate; • periphery: – fibrin wall. Fig. 5. 25. From cases of the Pathology Department U. M. F. “Gr. T. Popa” Iasi HE staining
Cronic hepatic abscess • central cavity contains • purulent exudate; § peripheral wall - pyogenic membrane § external layer § connective-vascular tissue of neoformation § internal layer § fibrin network § neutrophils Fig. 5. 26. From cases of the Pathology Department U. M. F. “Gr. T. Popa” Iasi
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