BACKGROUND: Esophagectomy is a challenging procedure due to: a) it is a complex operation; b) it is linked to very high morbidity and mortality rates; c) surgical anatomy of the esophagus is very peculiar. The anatomic variations that can be unexpectedly found during an operation may cause complications and influence the outcome. AIM: To review the anatomic basis for esophagectomy focusing on anatomic variations found in the mediastinal structures based on literature review and cadaver dissection. METHODS: Literature related to the surgical anatomy of the esophagus and mediastinal structures was reviewed. Also, a total of 20 fresh (non-embalmed, non-preserved, time of death under 12 h) human cadavers were dissected. There were 16 male and mean age was 53 ± 23 years. RESULTS: Anatomic variations for aorta, azygos system, pleura, vagus nerve, lymph nodes and thoracic duct were documented. CONCLUSIONS: The organs and structures of the mediastinum may frequently present anatomic variations. Some of these may be clinically significant during an esophagectomy. Because only a part of them may be identified before the operation with the current imaging tools, surgeons must be aware of these anatomic variations.
BACKGROUND: Esophagectomy is a challenging procedure due to: a) it is a complex operation; b) it is linked to very high morbidity and mortality rates; c) surgical anatomy of the esophagus is very peculiar. The anatomic variations that can be unexpectedly found during an operation may cause complications and influence the outcome. AIM: To review the anatomic basis for esophagectomy focusing on anatomic variations found in the mediastinal structures based on literature review and cadaver dissection. METHODS: Literature related to the surgical anatomy of the esophagus and mediastinal structures was reviewed. Also, a total of 20 fresh (non-embalmed, non-preserved, time of death under 12 h) human cadavers were dissected. There were 16 male and mean age was 53 ± 23 years. RESULTS: Anatomic variations for aorta, azygos system, pleura, vagus nerve, lymph nodes and thoracic duct were documented. CONCLUSIONS: The organs and structures of the mediastinum may frequently present anatomic variations. Some of these may be clinically significant during an esophagectomy. Because only a part of them may be identified before the operation with the current imaging tools, surgeons must be aware of these anatomic variations.
Authors: Rogério Rodrigo Ramos; Mariane Gabriela Terezani; Elís Claudia Ribeiro Cantarella; Jose Maria Pereira de Godoy; Fernando Batigalia; Luciana Estevam Simonato; Wagner Rafael da Silva; José Martins Pinto Neto; André Wilian Lozano; Nilton Cesar Pezati Boer Journal: Cureus Date: 2022-04-17