Paroxysmal limb intolerable pain (infantile pain episodes associated with novel Nav1.9 mutations in familial episodic pain syndrome).

Painful peripheral neuropathy has been correlated with various voltage-gated sodium channel mutations in sensory neurons. Recently Navl.9, a voltage-gated sodium channel sub- type, has been established as a genetic influence for certain peripheral pain syndromes. Herein, we performed a genetic study in six unrelated, multigenerational Japanese families with episodic pain syndrome. Affected participants were characterized by infantile recurrent...