Rubinstein-Taybi syndrome: cranial MR imaging findings.

Rubinstein-Taybi syndrome is a syndrome of mental retardation associated with broad thumbs and big toes. The patients have a characteristic flat face with a beaked nose. This paper deals with brain changes in a patient with this syndrome, studied by MR imaging, which mainly consist of bilateral rolandic cortical clefts and diminished white matter, which probably account for mental retardation.