Wild-Type Transthyretin Amyloidosis in the Kidneys.

Wild-type transthyretin (ATTRwt) amyloidosis typically presents with restrictive cardiomyopathy. Kidney involvement is exceedingly rare. We report to our knowledge the first antemortem diagnosis of ATTRwt amyloidosis with kidney vasculature deposition in a patient presenting with progressive kidney failure. Notably, technetium-99m pyrophosphate scintigraphy showed no myocardial uptake. This case expands the known spectrum of organ involvement in ATTRwt amyloidosis and underscores the need to consider extracardiac manifestations in its diagnosis.