Intralobar pulmonary sequestration: diagnostic expertise.

Area of Science:

• Cardiothoracic Surgery
• Pulmonary Medicine
• Congenital Malformations

Background:

• Intralobar pulmonary sequestration (IPS) is a rare congenital lung malformation where lung tissue receives an anomalous systemic arterial supply.
• Patients with IPS are prone to recurrent respiratory infections, which can complicate diagnosis and management.
• Obesity can exacerbate respiratory issues and may influence clinical presentation and treatment decisions.

Observation:

• A 22-year-old obese male presented with pleuritic chest pain, productive cough, and fever, suggestive of a lower respiratory tract infection.
• Initial investigations revealed elevated inflammatory markers, left lung base infiltrates on chest X-ray, and left costophrenic angle opacity.
• An angio-CT scan identified bilateral consolidations and a critical finding: an aberrant arterial branch from the aorta supplying the left lower lobe sequestration.

Findings:

• The patient's symptoms were attributed to a respiratory infection superimposed on an underlying intralobar pulmonary sequestration of the left lung base.
• The anomalous systemic arterial supply from the aorta to the sequestered lung segment was confirmed.
• Successful treatment of the acute infectious process was achieved.

Implications:

• This case underscores the importance of considering congenital lung anomalies in young patients with recurrent respiratory infections, especially when standard treatments are less effective.
• Accurate diagnosis using advanced imaging like angio-CT is crucial for identifying the anomalous vasculature in pulmonary sequestration.
• Surgical management, specifically lobectomy, remains the definitive treatment for symptomatic pulmonary sequestration to prevent recurrent infections and potential complications.