[Plastic bronchitis: report of a pediatric case].

Area of Science:

• Pediatric Pulmonology
• Rare Diseases
• Respiratory Medicine

Background:

• Plastic bronchitis (PB) is a rare condition characterized by obstructive tracheobronchial casts.
• PB typically complicates cardiac or respiratory disorders.
• The presentation of PB before the underlying disease is unusual.

Observation:

• A 3-year-old boy without prior lung disease presented with acute respiratory tract infection and left lung atelectasis.
• Bronchoscopy revealed extensive purulent casts obstructing the left tracheobronchial tree.
• Cast removal led to immediate symptom resolution.

Findings:

• Initial etiological investigations for the cause of plastic bronchitis were negative.
• The patient later developed asthma approximately two years after the PB episode.
• This suggests a potential, albeit unusual, preceding role of PB in the development of asthma.

Implications:

• This case underscores the importance of considering plastic bronchitis even in the absence of apparent underlying pulmonary disease.
• It highlights an atypical presentation where PB may precede the diagnosis of conditions like asthma.
• Further research into the pathogenesis of plastic bronchitis and its potential links to other respiratory conditions is warranted.