Patients receive short-acting octreotide subcutaneously three times daily on days 1-21 OR days 1-28. If the patient tolerates short-acting octreotide, the first dose of long-acting octreotide (Sandostatin LAR) depot will be given intramuscularly beginning on day 8 OR day 15. Treatment with long-acting octreotide repeats every 28 days in the absence of disease progression or unacceptable toxicity.