“Glial bundles” in the spinal cord late after paralytic anterior poliomyelitis

“Glial bundles” in the proximal portion of the anterior spinal roots, identical to those in Werdnig‐Hoffmann disease, were observed in 3 patients many years after attacks of acute paralytic anterior poliomyelitis. These structures should therefore be considered a nonspecific astrocytic reaction secondary to the destruction of motor neurons and their axons rather than a malformation specific for Werdnig‐Hoffmann disease.