Secondary neoplasms of the esophagus.

A review of 62 cases of esophageal involvement by secondary neoplasms is reported. The common routes of esophageal involvement are by direct extension of the tumor from the contiguous or adjacent organs (45.2%), via mediastinal nodes (35.5%), and hematogenous spread from a distant primary (19.3%). In the first 2 modes of esophageal involvement, the diagnosis is usually obvious but hematogenous metastases to the esophagus usually pose a diagnostic challenge. Radiologically, hematogenous metastases show a spectrum of features consisting of a short segment of progressive stricture with normal to minimally irregular mucosa, a submucosal mass with or without ulceration, a polypoid mass or masses, and defects in esophageal motility including secondary achalasia. Since endoscopy and biopsy have limited diagnostic yield, radiologic diagnosis plays a key role in the diagnosis of secondary neoplasms of the esophagus irrespective of their mode of spread to the esophagus.