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• Vol.61 No.5
• CLINICA NEUROL, 61: 288−296, 2021
• Vol.61 No.5 contents

Review

Non-aphasic misnaming: a case report and literature review

Yuichiro Inatomi, M.D.¹⁾, Minoru Matsuda, M.D.²⁾ and Hideko Mizuta, RST, Ph.D.³⁾

¹⁾ Department of Neurology, Saiseikai Kumamoto Hospital
²⁾ Izumi-no-mori Clinic
³⁾ Department of Rehabilitation, Fujii-kai Rehabilitation Hospital

A 71-year-old, right-handed woman was admitted to our hospital due to a sudden difficulty with conversation. On admission, she was alert, but had a euphoric mood, disorientation, and a disturbance of recent memory. Her speech was fluent. Her repetition and auditory word cognition were excellent, but she had a slight difficulty with naming visual objects. She frequently showed word-finding difficulty and irrelevant paraphasia during free conversation and a word fluency task. Her irrelevant paraphasia was observed more frequently when she was asked to explain her outbreak of anger at the hospital, i.e., it was situation-dependent. She also had anosognosia. MRI showed an infarct in the territory of the left tuberothalamic artery. Single-photon emission computed tomography revealed low-uptake lesions in the left thalamus and orbital frontal, medial frontal, and medial temporal lobes. The patient was diagnosed with non-aphasic misnaming. The clinical characteristics of patients with non-aphasic misnaming in the literature were reviewed. All of the patients with non-aphasic misnaming had word-finding difficulty and irrelevant paraphasia. Additionally, they had either emotional disturbance or anosognosia.
Full Text of this Article in Japanese PDF (4371K) 　　　　 Full Text of this Article in English HTML

(CLINICA NEUROL, 61: 288−296, 2021)
key words: non-aphasic misnaming, irrelevant paraphasia, thalamus, anosognosia, situation-dependent

(Received: 14-Sep-20)