[Cohen syndrome. Description of a new case and study of the central nervous system using nuclear magnetic resonance].

The Cohen syndrome is characterized by dysmorphic face, obesity, narrow hands and feet and mild mental retardation. So far only 42 cases have been described in literature. The Authors describe a patient who presented some cerebral anomalies at the MRI examination. In particular the MRI showed a large sellar cavity compared to the size of the hypophysis.