11C-5HTP, 11C-hydroxyephedrine and 11C-metomidat

11C-5HTP, 11C-hydroxyephedrine and 11C-metomidat

These are tracers for positron emission tomography based on labelling specific substances that are accumulated in the tumors. For carcinoid tumors and other neuroendocrine tumors 11C-5HTP is the most valuable. For pheochromocytomas 11C-hydroxyephedrine is of value and 11C-metomidat is used in patients with adrenocortical cancer.