NCIt definition : A radiotracer containing a synthetic amino acid analogue of L-leucine radiolabeled
with fluorine F 18 with potential diagnostic imaging use. Similar to most amino acids,
fluciclovine F18 appears to enter cells through the energy-independent L-type amino
acid transporter (LAT) system. As an amino acid analogue, this agent is preferentially
accumulated by tumor cells due to their increased metabolic needs; however, unlike
naturally occurring amino acids, this non-natural amino acid-analogue radiotracer
is not metabolized. Accordingly, fluciclovine F18 accumulates in tumor cells and can
potentially be used to image tumors using positron emission tomography (PET).;