Direct esophageal metastasis from a distant primary tumor is a submucosal process: a review of six cases.
Malignant esophageal stricture secondary to invasion from a tumor arising in a contiguous organ is a relatively rare finding; even more uncommon is a direct metastasis to the esophagus from a distant primary carcinoma. We present six cases, the largest current series, of esophageal strictures secondary to metastases from a separate primary cancer. We reviewed the records of 20 patients treated at Virginia Mason Medical Center between 1972 and 2000 with a diagnosis of malignant esophageal stricture secondary to an extraesophageal primary carcinoma. Patients whose stricture appeared to be secondary to esophageal invasion or compression from a contiguous tumor or lymph nodes were excluded. The remaining six patients who had metastases to the esophagus itself were reviewed with respect to the nature of the primary tumor, presentation, radiologic and endoscopic findings, and treatment. Among the 20 patients reviewed, 14 were excluded owing to either contiguous involvement from a nearby primary malignancy, regional nodal involvement, or complications of external beam radiation treatment. Six patients were considered to have direct metastasis to the esophagus from distant primary malignancies. The mean age of these patients was 72 years (range 68-74). Two of the primary lesions were lung carcinoma, while four primaries were breast cancers. The average time interval from the diagnosis of a primary tumor to esophageal involvement was 7 years in patients with breast cancer and 5 months in patients with lung cancer. Three patients were palliated with endoscopic dilation and stent placement. The other three patients have died secondary to upper gastrointestinal bleeding. Metastatic cancer to the esophagus is a rare occurrence. The process is usually submucosal and can be difficult to diagnose. The diagnosis should be considered when a patient presents with malignant dysphagia and has a background of distant carcinoma.