Intralobar pulmonary sequestration: incidental finding in an asymptomatic patient

Area of Science:

• Pulmonology
• Thoracic Surgery
• Radiology

Background:

• Intralobar pulmonary sequestration (IPS) is a rare congenital lung malformation where lung tissue receives its blood supply from a systemic artery and drains into the systemic venous system.
• It is often asymptomatic and diagnosed incidentally, posing a diagnostic challenge.

Observation:

• A 58-year-old male presented with appendicitis symptoms.
• Computed tomography (CT) scan revealed acute appendicitis and an incidental 6.7 cm mass in the right lower lung lobe.
• The mass exhibited features consistent with IPS: systemic arterial supply from the descending thoracic aorta and venous drainage into the right pulmonary vein.

Findings:

• The intralobar pulmonary sequestration was characterized by its size, lobulated appearance, and low-density anterior component, possibly mucoid material.
• Despite the significant size of the sequestration, the patient had no prior pulmonary symptoms or remarkable physical exam findings related to the lung mass.

Implications:

• This case underscores the potential for asymptomatic intralobar pulmonary sequestration, emphasizing the role of advanced imaging in identifying rare conditions.
• Increased awareness of IPS in clinical practice is crucial for timely diagnosis and management, even when patients present with unrelated acute conditions.
• The incidental finding highlights the importance of comprehensive radiological assessment to avoid overlooking significant underlying pathologies.