Capgras syndrome--the many avenues to delusional misinterpretation

The case of a 47 year old woman with Capgras' Syndrome is presented. Despite her misinterpretation of acoustic and visual clues, multiple investigations and extensive neuropsychological testing failed to implicate an organic basis upon which to explain her delusional belief. The authors conclude that single explanatory hypotheses--psychological or neurological--may preclude an appreciation for the heterogeneity of the syndrome.