Study on a family with anderson--Fabry's disease and associated familial spastic paraplegia.

A family in the north-east of England with Anderson--Fabry's disease is presented. Alpha-galactosidase activity in plasma and white cells was significantly reduced in three adult male members of the family. One of them had an abnormal chromosome karyotype pattern with an extra Y chromosome (47,XYY) and he was clinically less severely affected than his brothers. Coincidentally five other members of the family suffered from a form of familial spastic paraplegia.