In a Letter to the Editor, "Neuroblastoma in Duchenne Muscular Dystrophy" (Pediatrics 1986;78:1170-1171), there is a typographical error in the third paragraph. The sentence should read, "The tape from the National Center for Health Statistics which lists all causes of deaths in the entire United States in 1980 enumerated 422 [not X] males who died at less than 30 years of age..."