68Ga-DOTA-TOC PET/CT in Imaging Participants With Neuroendocrine Tumors

PRIMARY OBJECTIVES: I. To substitute 68Ga-DOTATOC for 111In-pentetreotide on an expanded access basis, in tumor imaging for study subjects, where the care provider believes that somatostatin imaging is clinically indicated, until such time as 68Ga-DOTATOC becomes commercially available. SECONDARY OBJECTIVES: I. To gain experience in the utility of 68Ga-DOTATOC in the management of neuroendocrine tumors at The University of Texas M.D. Anderson Cancer Center (MDACC). II. To acquire proficiency in generating 68Ga-DOTATOC for human use at MDACC. OUTLINE: Participants receive gallium Ga 68-edotreotide intravenously. After 1 hour, participants undergo PET/CT scan over 60 minutes. After completion of study, participants are followed up at 24 hours or within 72 hours, and at 30 days.