Institutional Learning Curve in Esophagectomy: Technical Standardization of Gastric Conduit Formation and...

Learning curves in esophagectomy are often described in terms of procedural volume, but institutional maturation also reflects progressive standardization of reconstruction, operative choreography, and team-based decision-making. Gastric conduit viability remains central to safe esophageal reconstruction, with conduit ischemia, torsion, and tension contributing substantially to leak and necrosis. We examined the institutional learning curve of a high-volume esophageal cancer program, focusing on technical standardization of gastric conduit formation and conduit-related outcomes.

We retrospectively analyzed 187 consecutive patients who underwent esophagectomy for locally advanced esophageal cancer between 2019 and 2025 at a tertiary cancer center. For descriptive temporal comparisons, the cohort was divided into two pragmatic phases corresponding to institutional practice before and after routine formalization of the conduit protocol: up to 2022 (n = 101) and 2023-2025 (n = 86). During program maturation, a standardized gastric conduit protocol was formalized, emphasizing preservation of conduit vascularity, controlled conduit geometry, minimal omental bulk, cervical-first dissection, torsion-free transposition, and selective pyloric management. The primary outcome was composite major conduit-related morbidity, defined per patient as major anastomotic leak, major conduit necrosis, or conduit-related re-exploration. Secondary outcomes included overall leak, vocal cord palsy, chyle leak, Clavien-Dindo grade, 30-day mortality, R0 resection, and lymph node yield. Outcomes were interpreted within the broader context of institutional maturation rather than as a simple calendar-era comparison.

Composite major conduit-related morbidity declined from 8.9% in the earlier phase of the program to 2.3% in the later phase. Within this composite, major conduit necrosis declined from 5% to 0%, while overall leak rates remained stable. Thirty-day mortality was 4.3%, and most complications were minor. Oncologic adequacy was preserved, with R0 resection in 94.7% and a median lymph node yield of 25. Improvements in pathological complete response and recurrence over time paralleled broader changes in neoadjuvant treatment intensity and lymphadenectomy and should not be attributed solely to conduit protocolization.

Institutional maturation in esophagectomy was associated with transition from experience-dependent practice to reproducible technical standardization of gastric conduit formation. This learning curve coincided with disappearance of major conduit necrosis without compromising oncologic adequacy. Standardization of conduit construction may represent an important and exportable quality-improvement step in developing high-volume esophageal cancer programs, especially in resource-variable settings.