Simpson-Golabi-Behmel syndrome: follow-up of the Michigan family.

Here we report a follow-up on a boy born in 1983 into a family with presumed Simpson-Golabi-Behmel syndrome and first reported as patient 3 by Opitz [1984] under the designation "Golabi-Rosen" syndrome. The patient died at 25 months without having attained any measure of psychomotor development or maturation and with a neurologic picture of irritability, increased muscle tone, seizures, deafness and possible cortical blindness. He had a striking facial appearance similar to that of severely affected individuals in the family reported by Golabi and Rosen [1984], with mild hepatosplenomegaly, unusual skin, normal growth, decelerating OFC, and on autopsy a spongiform degeneration of brain stem and cerebrum. Results of all biochemical studies, including those pertaining to GM3 gangliosidosis, were normal.