This issue of Hematology/Oncology Clinics of North America is devoted to Neuroendocrine tumors. Articles in this issue include: Pathology Classification of Neuroendocrine Tumors; Clinical Presentation and Diagnosis of Neuroendocrine Tumors; Surgical Management of Gastrointestinal Carcinoid Tumors; Systemic Therapies for Advanced Gastrointestinal Carcinoid Tumors; Thymic and Bronchial Carcinoid Tumors; Surgical Management of Pancreatic Neuroendocrine Tumors; Systemic Therapies for Advanced Pancreatic Neuroendocrine Tumors; Pheochromocytoma and Paraganglioma; Poorly Differentiated Neuroendocrine Tumors; Role of Somatostatin Analogs in the Treatment of Neuroendocrine Tumors; Peptide Receptor Radiotherapy in the Treatment of Neuiroendocrine Tumors; Hepatic-Directed Therapies in Patients with Neuroendocrine Tumors; and Neuroendocrine Tumor Clinical Trial Interpretation and Design.