Metastatic tumors to the mucosa of the stomach are unusual occurrences that can cause clinical and pathologic problems in diagnosis. The authors report 67 cases from the files of the Veterans Administration Center at Houston. Ten cases were found on endoscopic biopsy and 57 at necropsy. Each patient endoscopically evaluated presented with upper gastrointestinal tract symptoms, including bleeding, abdominal pain, anorexia, and vomiting. At endoscopic examination, characteristic "volcano-like" ulcers were noted. Clinical gastrointestinal symptoms were present in 30 of the necropsy cases, and in four cases the gastric metastases led to the patients' deaths. Tumors primary in the lung accounted for most of the metastases (55%), followed by other gastrointestinal malignancies. A correct diagnosis is important to direct therapy and is facilitated by the characteristic clinical, endoscopic, and histologic findings.