Peripheral nervous system manifestations of Chediak-Higashi disease

IntroductionChediak-Higashi disease (CHD) is a rare autosomal recessive disorder with hematologic, infectious, pigmentary, and neurologic manifestations. Classic CHD (C-CHD) presents in early childhood with severe infectious or hematologic complications unless treated with bone marrow transplantation. Atypical CHD (A-CHD) has less severe hematologic and infectious manifestations. Both C-CHD and A-CHD develop neurological problems. MethodsEighteen patients with CHD (9 A-CHD and 9 C-CHD) underwent electrodiagnostic studies as part of a natural history study (NCT 00005917). Longitudinal studies were available for 10 patients. ResultsAll A-CHD patients had either sensory neuropathy, sensorimotor neuropathy, and/or diffuse neurogenic findings. In C-CHD, 3 adults had sensorimotor neuropathies with diffuse neurogenic findings, and 1 adult had a sensory neuropathy. The 5 children with C-CHD had normal electrodiagnostic findings. ConclusionsCHD can result in sensory or sensorimotor neuropathies and/or a diffuse motor neuronopathy. It may take 2-3 decades for the neuropathic findings to develop, because children appear to be spared. Muscle Nerve55: 359-365, 2017