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Behavioural Neurology
Volume 11 (1998), Issue 1, Pages 51-54
Case report

Unusual Visual Symptoms and Ganser-Like State Due To Cerebral Injury: A Case Study Using 18F-Deoxyglucose Positron Emission Tomography

Stephen L. Snyder,1 Monte S. Buchsbaum,1 and R. C. Krishna2

1Department of Psychiatry, Mount Sinai School of Medicine, New York, NY, USA
2Formerly: Department of Neurology, Mount Sinai School of Medicine, New York, NY, USA

Received 14 April 1997; Revised 19 February 1998

Copyright © 1998 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Bizarre visual symptoms and absurd verbal responses to questions, in a 32-year-old man recovering from a severe asthma episode, suggested a possible conversion disorder with Ganser-like symptoms. Positron Emission Tomography (PET)revealed bilateral lesions involving occipital association cortex and posterior temporal and parietal lobes, most likely infarcts from hypoxia. PET permitted correlation of the patient’s specific cortical lesions with his unusual perceptual, cognitive, and speech symptoms, including Ganser-like state , to a degree not previously possible in such cases.