Intralobar pulmonary sequestration with bronchogenic cyst: a case report

Intralobar pulmonary sequestration (ILS) with concurrent bronchogenic cyst represents a rare congenital malformation often diagnosed incidentally. We present a 48-year-old asymptomatic female whose routine Computed Tomography (CT) revealed a left lower lobe mass with aberrant systemic arterial supply (thoracic aortic branch) and a separate mediastinal cyst. Thoracoscopic resection confirmed ILS (48.11 mm × 37.45 mm solid-cystic lesion with vascular anomalies) and bronchogenic cyst (27.91mm × 24.16 mm). This case demonstrates three critical findings: (i) Contrast-enhanced CT with vascular reconstruction is diagnostic, clearly identifying the pathognomonic feeding vessel; (ii) Minimally invasive resection is feasible despite anatomical complexity, requiring meticulous vascular control; (iii) Asymptomatic presentations warrant intervention to prevent future complications. The coexistence of these embryologically related anomalies underscores the need for comprehensive imaging to detect associated malformations. Histopathology confirmed both diagnoses without malignancy. The patient recovered uneventfully, supporting thoracoscopic management as the therapeutic standard. This report emphasizes early surgical consideration even in asymptomatic cases, guided by characteristic radiologic findings.