Parosmia, defined as the distorted perception of an odor stimulus, has been reported to be associated with head trauma, upper respiratory tract infections, sinonasal diseases, and toxin/drug consumption. To date, little is known about parosmia in right-lateralized semantic variant primary progressive aphasia. A 60-year-old right-handed man presented with a 2-year history of parosmia and prosopagnosia. Brain magnetic resonance imaging demonstrated severe atrophy of the right anterior and mesial temporal lobe, particularly in the fusiform cortex and the regions known as the primary olfactory cortex. 18F-fluorodeoxyglucose position emission tomography showed asymmetric hypometabolism of the bilateral temporal lobes (right > left). We clinically diagnosed him with right-lateralized semantic variant primary progressive aphasia. As the right hemisphere is known to be more involved in the…
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