Carcinoid tumors of the ileum.

Thirty patients with carcinoid tumors of the ileum over a recent 10-year period have been analyzed. Seventeen patients were symptomatic and 13 others were found to have tumors incidentally at autopsy or celiotomy. Patients with symptoms almost invariably had metastatic disease, yet preoperative diagnosis was rarely achieved. Arteriography in five patients with intestinal angina demonstrated encasement, kinking, and irregularity of mesenteric branches due to nodal metastasis. In five patients, each with liver metastasis, the classic carcinoid syndrome developed. Multiple primary carcinoid tumors were found in 9 of 30 patients (30 percent); 14 had an associated second malignant neoplasm (47 percent), most frequently colorectal carcinoma. En block surgical excision was the only effective therapy. Despite a prolonged natural history, the 5-year actuarial survival rate from the date of diagnosis was only 31 percent.