In 111 pentetreotide (OctreoScan)

• Peptide analog of somatostatin and octerotide
• Binds to tumors with somatostatin receptors (neuroendocrine tumors)
• Normal uptake hottest in kidneys and spleen, less liver, no bone uptake

Sensitivity: gastrinoma (95%), carcinoid (80%), glucagonoma (70%), medullary thyroid (50%), pheochromocytoma and neuroblastoma (90%), small cell lung (70%), lymphoma (70%), breast cancer (70%).