Coexistence of tuberous sclerosis and Friedreich ataxia

Coexistence of tuberous sclerosis and Friedreich ataxia. Melanie Walker, Ali Samii, Thomas Bird; Journal of the Neurological Sciences Volume 221, Issue 1 , Pages 91-93, 15 June 2004

"The occurrence of two mutations on the same chromosome is probably coincidental but emphasizes the importance of searching for additional genetic causes when the phenotype does not fit with an established genetic diagnosis."