A case of cortical deafness and anarthria.
Generally, cortical deafness is not complicated by anarthria and cortical anarthria does not affect auditory perception. We report a case of simultaneous progressive cortical deafness and anarthria. At the age of 70 years, the patient, a woman, noticed hearing problems when using the telephone, which worsened rapidly over the next 2 years. She was then referred to our hospital for further examinations of her hearing problems. Auditory tests revealed threshold elevation in the low and middle frequencies on pure-tone audiometry, a maximum speech discrimination of 25% and normal otoacoustic emissions and auditory brainstem, middle- and long-latency responses. An articulation test revealed abnormal pronunciation. Because of these problems only written and not verbal communication was possible; her ability to read and write was unimpaired. She showed no other neurological problems. Brain MRI demonstrated atrophic changes of the auditory cortex and Wernicke's language center and PET suggested low uptake of (18F) 2-fluoro-2-deoxy-d-glucose around the Sylvian fissures in both hemispheres. Neurologically, the patient was suspected of having progressive aphasia or frontotemporal dementia. Her cortical deafness and anarthria are believed to be early signs of this entity.
Kaga
Kimitaka
K
Department of Otolaryngology, Graduate School of Medicine, University of Tokyo, Japan. kimikaga-tky@umin.ac.jp
Nakamura
Masako
M
Takayama
Yoshihiro
Y
Momose
Hiromitsu
H
D000368:Aged; D018888:Aphasia, Primary Progressive / Q000150:complications / Q000175:diagnosis*; D001041:Aphasia, Wernicke / Q000150:complications; D001184:Articulation Disorders / Q000000981:diagnostic imaging / Q000209:etiology* / Q000473:pathology; D001300:Audiometry, Evoked Response; D001301:Audiometry, Pure-Tone; D001303:Auditory Cortex / Q000000981:diagnostic imaging / Q000473:pathology*; D001307:Auditory Perception; D001308:Auditory Perceptual Disorders / Q000150:complications / Q000175:diagnosis; D001309:Auditory Threshold; D003638:Deafness / Q000150:complications* / Q000503:physiopathology*; D003704:Dementia / Q000150:complications; D016057:Evoked Potentials, Auditory, Brain Stem; D005260:Female; D006801:Humans; D008279:Magnetic Resonance Imaging; D017084:Otoacoustic Emissions, Spontaneous; D013018:Sound Spectrography; D013063:Speech Discrimination Tests; D014055:Tomography, Emission-Computed