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Bronchial Atresia

Bronchial Atresia. Bill Lee Acc# 115057. “Gus” Hudson 5 mo. Male Weimaraner Chronic upper airway noise, congestion, coughing since purchased at 8 wks. of age + TTW at rDVM – Manheimia hemolytica Several Abx Initially resolves but returns. Bronchoscopy. Intrathoracic tracheal stricture

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Bronchial Atresia

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  1. Bronchial Atresia Bill Lee Acc# 115057

  2. “Gus” Hudson • 5 mo. Male Weimaraner • Chronic upper airway noise, congestion, coughing since purchased at 8 wks. of age • + TTW at rDVM – Manheimia hemolytica • Several Abx • Initially resolves but returns

  3. Bronchoscopy • Intrathoracic tracheal stricture • Bx – fibrosis and suppurative inflammation • Bronchi off right and left caudal lobar bronchus ended abruptly in a “blind pouch” or “membrane”

  4. Resolving aspiration pneumonia

  5. CT

  6. Bronchial Atresia • Unknown Etiology • Sequela to pulm. vascular insult during fetal dev. • Separation of the bronchial bud (similar to bronchogenic cysts) • Results in distal bronchi that do not communicate with prox. airways • Most (humans) are asymptomatic • Recurrent inf., dyspnea, cough, wheezing

  7. Bronchial Atresia • Imaging findings • Branching, tubular, ovoid or spherical mass (possibly cavitated w/ fluid line) • “bronchocoele” – impacted with bronchial secretions • Mass surrounded by hyperinflated lung w/ decreased vasc. markings • air can enter airways distal to obstruction via one way valves (pores of Kohn, canals of Lambert) • cannot exit via bronchial tree • Lung lobe distal to obstruction may develop pneumonia

  8. Other conditions may result in a bronchocoele • Bronchial F.B. • Broncholith • Stricture • Neoplasia • Asthma

  9. Bronchial Atresia • Imaging considered essential for DX • CT is modality of choice • Bronchoscopy can be normal

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