[Familial polymorphism of spinal amyotrophy in childhood].

The authors describe a familial form of childhood spinal amyotrophy. Among 7 patients in the M. family, 5 were diagnosed to suffer from type II spinal amyotrophy and 2 from type III. It is of interest to mention that type II was observed only in boys whereas type III in girls. The data of the clinical and electromyographic examination of two M. siblings of male and female sexes have been analyzed. Possible mechanisms of the clinical polymorphism of childhood spinal amyotrophy are under discussion.