Degeneration of fasciculus gracilis in cystic fibrosis.

The spinal cords of 19 percent of patients dying with cystic fibrosis 
after 5 years of age showed posterior column degeneration. The risk 
did not appear to increase with advancing age. None of these 
patients had findings of pernicious anemia or spinocerebellar degeneration. The lesions 
had been undetected clinically. It is possible that nutritional, toxic, or 
hereditary factors may play a role in producing this lesion. 