[Guidelines for presymptomatic genetic testing for adult-onset hereditary neuromuscular diseases in Japan].

In Japan, there are no nationwide guidelines for presymptomatic testing for hereditary neuromuscular diseases. Although each institution has been dealing with this situation by using their own procedures to date, it is necessary to develop a standardized guidelines based on the Japanese medical system, because the development of disease-modifying therapies has progressed, and we are entering an era in which early diagnosis and early treatment are necessary. The guidelines presented here were devised by the Committee on Medical Genetics of the Japan Neurological Society. During their development, Delphi surveys were conducted among individuals with extensive experience in presymptomatic testing throughout Japan, with 42 experts participating in all three surveys, and a consensus-building process was undertaken. Finally, the guidelines consist of 45 recommendations for performing presymptomatic testing for adult-onset inherited neurological and muscular diseases.