Two sibs with Charcot-Marie-Tooth disease had repeated episodes of generalized weakness. The patients had distal weakness and atrophy as well as findings of CNS involvement on brain MRI. Both patients bear the C164T mutation of the connexin 32 gene but no mutations of the genes responsible for hyper- or hypokalemic periodic paralysis. It is possible that both patients have one disease with complex phenotype due to abnormal expression of the connexin 32 gene.