Aberrant Drainage to the Right Upper Pulmonary Vein From the Right Middle or Lower Lung: How Common?

Aberrant venous drainage from the RML and RLL to the RUPV is relatively common and largely consistent with prior anatomical and radiologic descriptions. These findings, based on surgically verified mapping under a standardized VATS approach, confirm and refine existing knowledge and underscore the need for meticulous intraoperative assessment and careful review of preoperative imaging to avoid vascular complications. Future studies should explore multi-institutional data and long-term outcomes to further optimize surgical strategies.