Module 3C: Pathology of Alveoli, Pleural Cavity, and Patterns of Pulmonary Disease

Question 1

What are the possible “entry points” into the lungs for pathogens/

Answer 1

• Blood vessels
• In through the airways

Question 2

Distribution
- Pattern is CRANIOVENTRAL distribution due to gravity and airway distribution

Answer 2

Inhaled/aerogenous

Question 3

Distribution
- Pattern is either diffuse or multifocal

Answer 3

Hematogenous

Question 4

Definition:
type of pneumonia that causes inflammation in the alveoli

Answer 4

Bronchopneumonia
- Cranio-ventral pattern
- Airborne Pathogenesis

Question 5

What are the causes of Bronchopneumonia?

Answer 5

• Primary bacterial pneumonia
• Aspiration pneumonia

Question 6

• Minimal or nonexistent normal tissue to compare to
• Other patterns may be superimposed
• Tend to be congested with edema and rubbery
  - expanded lung tissue -> rib impression
  This is describing …

Answer 6

Interstitial pattern

Question 7

What are the common causes of Interstitial patterns?

Answer 7

• Viral pneumonia (inflammation, congestion, edema)
• Left-sided congestive heart failure (congestion, edema)

Question 8

• Wide distribution and numerous foci indicate an “embolic shower”
• Dark red = hemorrhage
• Light tan = necrosis, inflammation, neoplasia
  This is describing …

Answer 8

Embolic pattern

Question 9

What are the PRIMARY sites of hemangiosarcoma in the dog?

Answer 9

• Spleen
• Right atrium
• Liver
  ** Metastasis can go ANYWHERE **