1 Department of Pediatrics, University of California, San Francisco, CA
2 Clinical Epidemiology Branch, National Cancer Institute, Bethesda, MD
To the Editor.
In reporting two patients with neuroblastoma and cystic fibrosis, Moss et al1 noted that "reports of cystic fibrosis and other genetic abnormalities in individual patients are usually regarded as chance associations."
We encountered an analogous situation in caring for a boy in whom stage III neuroblastoma developed at 9 months of age; he responded to surgery and chemotherapy and subsequently was found to have classical Duchenne muscular dystrophy at 3
years of age.