Abstract
Amyloidosis is a protein misfolding disorder characterized by the extracellular deposition of insoluble amyloid fibrils, derived from abnormally folded proteins. These fibrils disrupt tissue structure and function, leading to organ dysfunction. The condition encompasses various subtypes, each associated with distinct precursor proteins and clinical manifestations. 99mTc-PYP scintigraphy is used widely and holds significant importance for diagnosis. 68Ga-FAPI is also a promising radiotracer for various diseases. To our knowledge, this is the first case of a patient with hereditary transthyretin amyloidosis with cardiac involvement, which FAPI PET showed diffuse increased myocardial uptake.
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