Specific Localization of the Transparent Internal Interlobar Surfaces

Description

Transparent rendering of the lungs delineates the fissural facies and internal interlobar surfaces that separate the lobes, with the oblique fissure coursing infero-anteriorly and the horizontal fissure, when present, running antero-laterally to divide the right superior and middle lobes. Interlobar planes appear as smooth, curvilinear boundaries extending from the visceral pleural surface into the parenchyma, establishing superior to inferior and anterior to posterior relationships between adjacent lobes. Lobar margins are inferred by the intersecting fissures and their continuation toward the hilum. Clear planes. Accurate localization of these interlobar surfaces matters when you need to correlate segmental and lobar disease with imaging. Fissures often limit early spread of pneumonia or atelectasis, yet incomplete fissures allow collateral extension, a common source of mismatch between an expected lobar pattern on chest radiograph and the distribution seen on CT. Surgeons also rely on fissural anatomy during lobectomy and VATS, where a dense or fused fissure increases air-leak risk and can shift the preferred dissection from fissure-first to fissure-last techniques. Educators can use this translucent lung overview in gross anatomy, respiratory system modules, and radiology teaching to orient learners before introducing bronchopulmonary segments, the hilum, and pleural reflections. It also fits well in atlases or journal figures discussing fissural variants, interlobar pleural spread of malignancy, or preoperative planning for anatomic resection. Anatomical accuracy verified by SciePro's Medical Advisory Board.