Successful carinal reconstruction with right main bronchial flap rotational embedded augmentation: a case report.

Background: Tracheo-carinal resection and reconstruction in cases of extensive malignant tumors present a significant surgical challenge, often complicated by high anastomotic tension and potential for incomplete anastomosis. Case Description: We report on a 45-year-old male with a primary adenoid cystic carcinoma. The tumor was about 3 cm in size and invaded about 1 cm of the lower trachea, 2 cm of the left main bronchus (LMB), and 1 cm of the right main bronchus (RMB), blocking about 70% of the tracheal lumen, 90% of the LMB, and 50% of the RMB. Resection of the lower trachea and part of the LMB and RMB was performed via the right chest. We used the right main bronchial flap as a bridge, suturing it separately to the lower tracheal segment and the LMB, thereby completing the carinal reconstruction. This technique was crucial for bridging the defect between the trachea and LMB, which was impossible to anastomose directly due to the tumor's extensive involvement. The elliptical-shaped lingual flap from the RMB provided a stable and tension-free foundation for the reconstruction, overcoming the limitations of conventional methods. Conclusions: The novel carinal reconstruction technique demonstrated a reliable alternative for complex tracheo-carinal defects, ensuring tension-free anastomosis and complete tumor resection with clear margins.