Editors' Note

Abstract

Editors' Note: Commenting on “Acute intermittent porphyria-related leukoencephalopathy,” Dr. Pinto et al. suggest that the family described could be classified as complicated hereditary spastic paraplegia. Authors van der Knaap et al. disagree and explain that the term complicated hereditary spastic paraplegia is reserved for neuronal degenerative disorders predominantly affecting the long fibers of the corticospinal tracts and that leukodystrophies are specifically excluded. In the article “Diagnostic criteria in amyotrophic lateral sclerosis: A multicenter prospective study” by Geevasinga et al., Dr. Ali identified 2 errors. A correction appears on page 719. —Chafic Karam, MD, and Robert C. Griggs, MD Editors' Note: Commenting on “Acute intermittent porphyria-related leukoencephalopathy,” Dr. Pinto et al. suggest that the family described could be classified as complicated hereditary spastic paraplegia. Authors van der Knaap et al. disagree and explain that the term complicated hereditary spastic paraplegia is reserved for neuronal degenerative disorders predominantly affecting the long fibers of the corticospinal tracts and that leukodystrophies are specifically excluded.