Technetium-99m Labeled Tropane Derivative: Uptake in a Pituitary Macroadenoma

Abstract

We present a case of suspected idiopathic Parkinson s disease in whom extrastriatal accumulation of Technetium-99m labeled tropane derivatives in a pituitary macroadenoma interfered with image quality and interpretation. Subsequent F-18 fluoro-dihydroxyphenylalanine positron emission tomography/computed tomography was useful to demonstrate the absence of presynaptic dopaminergic dysfunction.