1. Acute Lobar Pneumonia (48)
Inflammation
Acute Lobar Pneumonia (48)
Acute
Lobar
Pneumonia
Carbon particles
Allergic Nasal Polyp
Alveolar
septa
Congested capillary
Acute Suppurative Appendicitis
Acute Suppurative meningitis
Inflammatory
exudate
Acute Fibrinous Pericarditis

2. Acute lobar pneumonia with fibrinous pleurisy(48)
Inflammation
Acute lobar pneumonia with fibrinous pleurisy(48)
Section in the lung showing:
The alveolar wall is thick, edematous with dilated congested blood vessels.
All the alveoli contain fibrin threads and polymorphs, histiocytes and red blood cells (fibrinous exudate).
On the surface the pleura is thickened by a network of fibrin threads entangling polymorphs.

3. Allergic Nasal Polyp (2)
Inflammation
Allergic Nasal Polyp (2)
Acute
Lobar
Pneumonia
Ulceration
Allergic Nasal Polyp
polyp
Acute Suppurative Appendicitis
Eosinophils
Acute Suppurative meningitis
Acute Fibrinous Pericarditis

4. Allergic Nasal Polyp (2)
Inflammation
Allergic Nasal Polyp (2)
Section shows:
A benign polypoid lesion covered by focally ulcerated pseudostratified columnar ciliated epithelium(respiratory epithelium)
The connective tissue core shows edema, congested thin walled blood vessels and inflammatory infiltrate rich in eosinophils.
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5. Acute Suppurative Appendicitis (3)
Inflammation
Acute Suppurative Appendicitis (3)
Acute
Lobar
Pneumonia
Ulceration
Allergic Nasal Polyp
Acute Suppurative Appendicitis
Polymorphs &pus cells
Acute Suppurative meningitis
Acute Fibrinous Pericarditis
Hyperplastic lymphoid follicles

6. Acute Suppurative Appendicitis (3)
Inflammation
Acute Suppurative Appendicitis (3)
Section in appendix showing:
The lumen contains suppurative exudate.
The mucosa is focally ulcerated.
The lymphoid follicles are hyperplastic.
There is transmural infiltration with polymorphs and pus cells.
Submucosa and serosa show dilated congested blood vessels.
The peritoneum shows suppurative peritonitis
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7. Acute Suppurative Meningitis (4) (Demo)
Inflammation
Acute Suppurative Meningitis (4) (Demo)
Acute
Lobar
Pneumonia
Subarachnoid space
Congested blood vessel
Allergic Nasal Polyp
Acute Suppurative Appendicitis
Oedematous
brain tissue
Suppurative
exudate
Acute Suppurative meningitis
Acute Fibrinous Pericarditis

8. Acute Suppurative Meningitis (4)
Inflammation
Acute Suppurative Meningitis (4)
Section in brain tissue with overlying leptomeninges ( Pia and arachnoid ) showing:
The subarachnoid space is replaced by suppurative inflammatory exudate .
It is formed of fibrin network densly infiltrated by polymorphnuclear leucocytes & pus cells .
The submeningeal blood vessels are dilated & congested .
The brain tissue at the surface is slightly oedematous and congested .

9. Acute Fibrinous Pericarditis (1) (Demo)
Inflammation
Acute
Lobar
Pneumonia
Acute Fibrinous Pericarditis (1) (Demo)
Myocardium
Allergic Nasal Polyp
Pericardium
Thickened
pericardium
Acute Suppurative Appendicitis
Fibrin threads
Acute Suppurative meningitis
Acute Fibrinous Pericarditis

10. Acute Fibrinous Pericarditis (1)
Inflammation
Acute Fibrinous Pericarditis (1)
Section reveals myocardium with overlying thickened pericrdium:
The subserosal layer is thickened , oedematous & shows moderae infiltration by PMN, few pus cells and histiocytes .
Thin walled blood vessels are seen .
The surface covered by irregular layers of fibrin theads entangling some acute inflammatory cells.