To the article, "Schilder's Myelinoclastic Diffuse Sclerosis" by Poser et al (Pediatrics 1986;77:107-112), the authors would like to add the following acknowledgment. The biopsy diagnosis of diffuse sclerosis was made by Dr Jacqueline Mikol, neuropathologist at the Hopital Necker-Enfants Malades, Paris.