Bronchiectasis A condition characterized by chronic permanent dilation & destruction of bronchi due to destructive changes in the elastic and muscular layers of bronchial walls. The common thread in the pathogenesis of bronchiectasis consists of difficulty clearing secretions & recurrent infections with a “vicious circle” of infection and inflammation resulting in airway injury and remodelling. PLEASE REFER TO REFERENCE TEXTBOOKS FOR CLARITY.

1. Bronchiectasis
By: Karunesh Kumar

2. Bronchiectasis
• A condition characterized by chronic
permanent dilation & destruction of bronchi
due to destructive changes in the elastic and
muscular layers of bronchial walls.
• May be diffuse or localized resulting in
impairment of the drainage of bronchial
secretions.

6. Aetiology
Congenital
• Cystic Fibrosis (Most common cause)
• Primary hypogammaglobinemia leading to recurrent
infection
• Ciliary dysfunction syndrome
Acquired (In children)
• Secondary to pneumonia which occurs often as
complication of whooping cough and measles

7. Bronchiectasis can also be congenital, as in:
• Williams-Campbell syndrome, in which there is an
absence of annular bronchial cartilage.
• Marnier-Kuhn syndrome (congenital
tracheobronchomegaly), in which there is a
connective tissue disorder.

8. Other disease entities associated with bronchiectasis
are:
• Right middle lobe syndrome (chronic extrinsic
compression of right middle lobe bronchus by hilar
lymph nodes)
• Yellow nail syndrome (pleural effusion,
lymphedema, discoloured nails).

9. Pathogenesis
• The common thread in the pathogenesis of
bronchiectasis consists of difficulty clearing
secretions & recurrent infections with a “vicious
circle” of infection and inflammation resulting in
airway injury and remodelling.

11. 3 mechanisms:
1. Obstruction- can occur because of tumour, foreign
body, impacted mucus due to poor muco-ciliary
clearance, external compression, bronchial webs, and
atresia.
2. Infections d/t Bordetella pertusis, measles, rubella,
adenovirus, and mycobacterium tuberculosis induce
chronic inflammation.

12. 3. Chronic inflammation contributes to the mechanism
by which obstruction leads to bronchiectasis.
• Inflammatory mediators such as neutrophil elastase,
interleukin-6, interleukin-8, and Tumor necrosis factor-
α (TNF-α) have been found to be elevated in the
airways of patients with bronchiectasis

13. Pathological forms of Bronchiectasis
• Cylindrical bronchiectasis- bronchial outlines are
regular, but there’s diffuse dilatation of the bronchial
unit. Bronchial lumen ends abruptly because of mucous
plugging.
• Tramline appearance on CT scan.
• Varicose bronchiectasis- degree of dilatation is greater,
local constrictions cause irregularity of outline
resembling that of varicose veins.
• Beaded contour on CT scan.

14. Cont..
• Saccular (Cystic) bronchiectasis- bronchial dilatation
progresses and results in ballooning of bronchi that
end in fluid or mucous filled sacs.
• Most severe form of Bronchiectasis.
• Prebronchiectasis- chronic or recurrent
endobronchial infection with non specific HRCT
changes – may be reversible.

16. Clinical Features
• Cough: Chronic productive cough usually worse in the
morning & often brought on by change in posture.
Cough occurs due to accumulation of pus in dilated
bronchi.
• Sputum: copious & purulent
• Fever
• Hemoptysis
• Anorexia and poor weight gain may occur as time
passes.
• Crackles localized to the affected area
• Wheezing as well as digital clubbing may also occur

17. Diagnosis
• Thin-section HRCT scanning- is the gold standard,
because it has excellent sensitivity and specificity.
• CT - provides further information on disease location,
presence of mediastinal lesions, and the extent of
segmental involvement.
• Chest X-ray- increase in size and loss of definition of
bronchovascular markings, crowding of bronchi, and
loss of lung volume. Severe case: Honeycombing
• Sputum culture.

19. Treatment
• Aims at decreasing airway obstruction and controlling infection.
• Postural drainage and control Infection.
• 2 to 4 wk of parenteral antibiotics is often necessary to manage acute
exacerbations adequately.
• Amoxicillin/ Clavulanic acid (22.5mg/kg/dose twice daily) has been
successful at treating the exacerbations.
• Long-term prophylactic oral (macrolide) or nebulized antibiotics (e.g.,
tobramycin, colistin, aztreonam) may be beneficial.
• Airway hydration (inhaled hypertonic saline or mannitol) also improves
quality of life in adults with bronchiectasis.
• Any underlying disorder (immunodeficiency, aspiration) that may be
contributing must be addressed.

20. Prognosis
• Children with bronchiectasis often suffer from
recurrent pulmonary illnesses.

21. Reference
• Kliegman, R., Stanton, B., St. Geme, J., Schor, N. and
Behrman, R. (n.d.). Nelson textbook of pediatrics.
20th ed.
• Short textbook of Medical Diagnosis and
Management by Mohammad Inam Danish