Although patients with Sandhoff disease (GM2 gangliosidosis variant O) have been diagnosed in
Cyprus and a high frequency of carriers has been found in one community (Drousiotou et al., 2000;
Furihata et al., 1999), no case of Tay-Sachs was diagnosed until now. In the present study we report the
clinical, biochemical and molecular characterization of the first case of juvenile TSD in the Cypriot
population. A successful preimplantation genetic diagnosis (PGD) was performed for the family