SUPPURATIVE LUNG DISEASES. Bronchiectasis. * Def: persistent dilatation of medium sized bronchi accompanied by suppurative inflammation of their walls. * Etio-pathogenesis: I. Weakening of the bronchial wall by; a. Chronic suppurative inflammation: due to recurrent septic bronchopneumonia.
I. Weakening of the bronchial wall by;
a. Chronic suppurative inflammation: due to recurrent septic bronchopneumonia.
b. Congenital weakness: leads to congenital bronchiectasis.
II. Bronchial obstruction: by foreign body, bronchial secretion or tumor.
- Dilated bronchi:
- The surrounding alveoli are: fibrotic and collapsed.
- The pleura shows: pleurisy
- Draining hilar L. nodes:enlarged
1. Bacterial pneumonia: lobar pneumonia & bronchopneumonia.
2. Viral (interstitial) pneumonia: influenza, measles, chicken pox.
3. Loeffler’s (parasitic) pneumonia: Bilharziasis, ascaris & ankylostomiasis.
4. Granulomatous pneumonia: T.B, sarcoidosis, leprosy, syphilis, actinomycosis .
5. Lipoid pneumonia: due to aspiration of oily nasal drops.
6. Irradiation pneumonia.
* Def: acute diffuse fibrinous inflammation of one or more lung lobes.
* Def: Acute suppurative inflammation of bronchioles and adjacent alveoli characterized by patchy lung consolidation.
I. The bronchioles show:
II. The adjacent alveoli show: 3 successive zones: zone of alveolitis then zone of alveolar collapse and a zone of alveolar dilatation (compensatory emphysema).