Pathology of Pneumonia

Pathology of Pneumonia:
Broncho- pneumonia,
Lobar Pneumonia,
Lung Abscess,
Lung Fungal Absces,
Normal Lung

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1. The best way to make your dreams
come true
is to wake up...
— Paul Valery

2. Pathology of Pathology of
PneumoniaPneumonia
Dr. Venkatesh M. ShashidharDr. Venkatesh M. Shashidhar
Senior Lecturer in PathologySenior Lecturer in Pathology
Fiji School of MedicineFiji School of Medicine

3. Introduction:
Daily 10,000 liters of air - filtered..!
Pneumonia: Inflammation of lung.
Respiratory tract infections –
commonest in medical practice.
Enormous morbidity & mortality.

4. Etiology:
Decreased resistance - General/immune
Virulent infection - Lobar pneumonia
Clearing mechanism
Cough Reflex
Mucosal Injury
Low Alveolar defense
Pulmonary edema
Obstructions

5. Types:
Viral
Bacterial
Mycoplasmal
Fungal

6. Patterns of Pulmonary infections:
Airway - Bronchitis, Bronchiectasis
Parenchyma
Pneumonia
Bronchopneumonia
Lobar pneumonia
Lung abscess
Tuberculosis

7. Bronchopneumonia
Staph, Strep, Pneumo & H. influenza
Patchy consolidation – not limited to lobes.
Suppurative inflammation
Usually bilateral
Lower lobes common
Complications:
Abscess
Empyema
Dissemination

8. Broncho-
pneumonia

9. Broncho-
pneumonia

10. Broncho-
pneumonia

11. Bronchopneumonia - Abscess formation

12. Bronchopneumonia:

13. Bronchopneumonia:

14. Bronchopneumonia - Abscess formation

15. Lung RSV Pneumonia:

16. Bronchopneumonia - CT

17. Bronchopneumonia - CT

18. Lobar Pneumonia:
Fibrinosuppurative consolidation – whole lobe
Rare due to antibiotic treatment.
~95% - Strep pneumoniae types 1,3,7& 2.
Four stages:
Congestion.
Red Hepatization.
Gray Hepatizaiton.
Resolution.

19. Lobar Pneumonia:

20. Lobar Pneumonia – Gray hep…

21. Lung Abscess:
Focal suppuration with necrosis of lung tissue
Strep, Staph & Gram negative & anaerobes
Mechanism:
Aspiration
Post pneumonic
Septic embolism
Neoplasms
Productive Cough, fever.
Clubbing
Complications: Systemic spread, septicemia.

22. Lung Abscess:

23. Lung Abscess:

24. Lung Abscess - Chronic:

25. Lung Fungal Abscess: Candida

26. Normal Lung

27. Normal Lung

28. The only place where
success comes before work
is in a dictionary…!
Vidal Sassoon