Amyotrophic Lateral Sclerosis and Metallic Toxins

Abstract
Twenty-four of a group of 31 patients with amyotrophic lateral sclerosis had been exposed to metallic toxins in their work, but no convincing evidence could be found of abnormal amounts of lead, mercury, or arsenic in the urine of 21 of the group or in necropsy tissues of two. Therapy with various chelating agents did not alter their clinical course.