To the Editor: The report by Kordower et al. (April 27 issue)1 describes the remarkable survival of dopamine cells after neural transplantation in a patient with Parkinson's disease. These results provide a clear demonstration that the brains of patients with this disease can support embryonic cells, as predicted by the results of studies in animal models. Those of us who have been involved in human neural transplantation for many years have seen clinical improvement and findings on positron-emission tomography (PET) that are compatible with this outcome.2–4 The clinical methods chosen by this group reflect an amalgamation of techniques. Kordower.
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