A large national comparative study of clinicopathological features and long-term survivals between esophageal gastrointestinal stromal tumor and leiomyosarcoma

Esophageal gastrointestinal stromal tumors (E-GIST) and leiomyosarcoma (E-LMS) are rare tumors. Previous studies are limited to small number of patients. We sought to study these two tumors using a large national database. The National Cancer Data Base 2004–2014 was queried for patients with E-GIST and E-LMS. The primary outcome was overall survival (OS). Univariate and multivariable Cox regression models were used to investigate OS predictors. We found 141 E-GIST and 38 E-LMS patients, with esophagectomy and systemic treatment rate of 55% and 49% for E-GIST and 50% and 26% for E-LMS. The 5-year OS of E-GIST and E-LMS were 62% and 23%, respectively, p