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Gastroenterology Research and Practice
Volume 2017, Article ID 1657310, 13 pages
https://doi.org/10.1155/2017/1657310
Review Article

Esophageal Cancer Metastases to Unexpected Sites: A Systematic Review

1Department of General Surgery, Damascus University Hospitals, Faculty of Medicine, Damascus University, Damascus, Syria
2Laboratory of Anatomy, Faculty of Medicine, Damascus University, Damascus, Syria

Correspondence should be addressed to Bayan Alsaid; moc.liamg@nayabrd

Received 12 March 2017; Accepted 24 April 2017; Published 4 June 2017

Academic Editor: Yusuke Sato

Copyright © 2017 Osama Shaheen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

The most common pattern of esophageal cancer metastases (ECM) is to the lymph nodes, lung, liver, bones, adrenal glands, and brain. On the other hand, unexpected metastasis (UM) spread to uncommon sites has increasingly reported and consequently affected the pathway of diagnosis, staging, and management. Using the PubMed database, a systematic search of the following headings “Esophageal” and “Metastasis” or “Metastases” was performed, 10049 articles were identified, and the articles were included if they demonstrated unexpected ECM. 84% of cases were men with an average age of 60.7 years. EC was located in the lower third in 65%. Two-thirds of the UM originated from the lower esophagus, and the two major histological types were adenocarcinoma 40% and squamous cell carcinoma 60%. Metastases were disseminated toward five main anatomical sites: the head and neck (42%), thoracic (17%), abdomen and pelvis (25%), extremities (9%), and multiple skin and muscle metastases (7%). The EC metastases were found to be synchronous 42% and metachronous 58%, isolated in 53.5% and multiple in 46.5%. The overall survival rate was 10.2 months. Since distant metastases are responsible for most EC-related deaths, understanding of ECM dissemination patterns needs more extensive studies. These critical data are the cornerstone of optimal cancer approach and treatment.