Superior Lingular Segment of the Left Pulmonary Lobe

Description

Arising from the anteroinferior aspect of the left upper lobe, the superior lingular segment (Segmentum lingulare superius) occupies the lingula as it projects anteriorly over the cardiac impression. Its segmental bronchus and artery course centrally within the parenchyma, while intersegmental pulmonary veins run in the connective tissue planes that demarcate it from the adjacent inferior lingular segment and from the more superior anterior segment of the upper lobe. Medially, the segment faces the mediastinal pleura and pericardium, and laterally it approaches the costal pleural surface. Segmental borders matter here. For teaching and for clinical planning, the lingula is the left-sided counterpart to the right middle lobe, and its superior segment is a common site of dependent atelectasis in supine patients and of recurrent infection when ventilation is impaired. Segmental anatomy becomes concrete in bronchoscopy and VATS, where identifying the lingular bronchus and distinguishing the superior from inferior lingular segments helps guide a lingular segmentectomy while preserving intersegmental veins and limiting postoperative air leak. Similar radiographic opacities can represent lingular consolidation, subsegmental collapse, or scarring, so orienting the segment against the heart border is a practical reading skill. Pulmonary and thoracic surgery curricula use this plate to anchor bronchopulmonary segment maps, and radiology teaching files can pair it with PA and lateral chest radiographs or CT axial and coronal reconstructions to localize lingular disease. Medical publishers will find it well suited for chapters on bronchopulmonary segments, lobar anatomy, and surgical approaches to the left upper lobe. Anatomical accuracy verified by SciePro's Medical Advisory Board.