Comparison of Lanreotide Autogel® and Sandostatin LAR Depot in the Treatment of Clinical Symptoms Associated With Carcinoid Syndrome

Inclusion Criteria: * Histologically confirmed diagnosis of a neuroendocrine tumor of the carcinoid type. * Documented evidence of carcinoid syndrome (flushing and/or diarrhea) attributable to a primary tumor of the lung, stomach or mid-gut. * Previous positive Octreoscan. * World Health Organization (WHO) performance score lower than 2. At the baseline visit patients MUST satisfy the following criteria before they are randomized to receive study treatment: * Stool and/or flushing frequency of greater than or equal to 3 episodes/day (average over a minimum five consecutive days). * Patients who have previously been treated with somatostatin analogues must have discontinued treatment for a sufficient period of time (a washout period of at least 7 days for immediate release formulations and up to 2 months for prolonged release formulations is usually required). Compared with their "controlled" state on treatment, these patients must show a clinically significant deterioration (at least two episodes) of either symptom. For example, a patient considered to be controlled on their previous treatment with an estimated stool frequency of two episodes per day, must achieve a stool frequency of at least four episodes per day (average over a minimum five consecutive days). * WHO performance score lower than 2. Exclusion Criteria: * VIPoma or other non-carcinoid tumor. * Treatment with interferon, chemotherapy or radiotherapy given within 30 days prior to inclusion, or planned during the study. * Radionuclide treatment within three months prior to inclusion, or planned during the study. * Presence of other active malignant pathology (except basal cellular carcinoma of the skin and/or in situ carcinoma of the cervix/uterus). * Surgical procedure or embolization procedure (with or without cytotoxic agents) of the tumor within three months prior to inclusion, or planned during the study. * Life expectancy of less than 6 months. * Any investigational drug given within 30 days prior to inclusion or expected to be given during the study. * No access to a telephone for completion of the daily telephone diary.