Eosinophilic intracytoplasmic inclusions in Purkinje neurons of children

Eosinophilic intracytoplasmic inclusions have been rarely described in Purkinje neurons of children with a variety of neurological conditions. Here we document these inclusions in five children from 3 to 14 years of age. One child had 7q deletion syndrome and a second had profound motor and cognitive delay ("cerebral palsy") of unknown origin, while three others were neurologically normal prior to death. These inclusions stain with the PAS method, are not strongly ubiquitinated, and are located in the lumen of endoplasmic reticulum. Their appearance in a wide range of disorders and in neurologically normal children suggests that they are a nonspecific protein trafficking anomaly, possibly aggravated under degenerative conditions.