Conversion, dissociative amnesia, and Ganser syndrome in a case of “chameleon” syndrome: Anatomo-functional findings
2014
The term “chameleon” was
first usedin the seventeenth century by Sydenham to describe a patient with a
protean
semiology. We report a single case of “chameleon” syndrome that challenges the current international criteria for somatoform disorders,
dissociative amnesia, and
Ganser syndrome. The florid symptoms were as follows: anterograde and
retrograde amnesia(including semantic, episodic, and procedural deficits), loss of identity, atypical neuropsychological impairment (approximate answers), left sensitive and motor deficit, and left pseudochoreoathetosis
movement disorders. Additional behavioral disorders included the following: anxiety, clouded consciousness,
hallucinations, and “belle indifference”. A
single photon emission computed tomographyexamination showed bilateral temporal, frontal and a right caudate (in the head of the
caudate nucleus) hypoperfusion concordant with a common mechanism of repression in these disorders.
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