Inflammation and repair Pathology Practical class 30-10-10.

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Presentation transcript:

Inflammation and repair Pathology Practical class

Gross and histopathology

1- Fibrinous pericarditis

Organ: Pericardium Dx: Fibrinous Inflammation

ACUTE FIBRINOUS PERICARDITIS

Fibrinous Pericarditis: Section of Heart shows: The pericardium is distorted by thick irregular layer of pinkish fibrinous exudate with some red cells and inflammatory cells. The subpericardial layer is thickened by edema and shows dilated blood vessels, chronic inflammatory cells and areas of calcification.

2- Acute appendicitis

ACUTE APPENDICITIS

Acute Suppurative appendicitis: Cross Section of Appendix shows: Accumulation of inflammatory exudate and pus cells in the lumen and the mucosa is ulcerated. All layers of the appendix wall show edema, dilated and congested blood vessels and infiltration by many neutrophils. Fibrino-purulent exudate is present on the serosal surface.

3-Skin pilonidal sinus

FOREIGN BODY REACTION (PILONIDAL SINUS)

Foreign Body reaction (Pilonidal sinus): Section of Skin Shows: A sinus tract lined by an inflammatory granulation tissue in the dermis. The lumen of sinus and wall contain large number of hair shafts with foreign body giant cells, lymphocytes, macrophages & neutrophils, macrophages & neutrophils.