摘要
It has been found in recent years that neuropeptides and neurotransmitters do notexclusively occur in classical neuroendocrine cell tumors but also in many other tumortypes. Serotonin (5-hydroxytryptamine, 5-HT) has been detected in some cells of certain co-lon carcinomas. It has been proved that 5-HT stimulates cell proliferation of the
