Tracheal bronchus with regional ventilation and perfusion abnormalities

Area of Science:

• Anatomy
• Pulmonology
• Medical Imaging

Background:

• Tracheal bronchus is a rare congenital anomaly of the tracheobronchial tree.
• This anomaly involves an aberrant bronchus originating from the trachea.

Observation:

• A case of tracheal bronchus supplying the right upper lobe is presented.
• The bronchus intermedius arose directly from the trachea, replacing the right main bronchus.
• Marked regional abnormalities in lung ventilation and perfusion were observed.

Findings:

• The presence of a tracheal bronchus was confirmed.
• Associated clinical and pathophysiologic abnormalities were identified.
• Significant ventilation-perfusion mismatch was noted in the affected lung region.

Implications:

• Understanding tracheal bronchus is crucial for diagnosing associated respiratory abnormalities.
• This anomaly can lead to significant regional lung dysfunction.
• Recognition is important for appropriate clinical management and surgical planning.