Mondo Description Alexander disease (AxD) is a rare neurodegenerative disorder of the astrocytes comprised of two clinical forms: AxD Type I and Type II manifesting with various degrees of macrocephaly, spasticity, ataxia and seizures and leading to psychomotor regression and death.

Uniprot Description A rare disorder of the central nervous system. The most common form affects infants and young children, and is characterized by progressive failure of central myelination, usually leading to death within the first decade. Infants with Alexander disease develop a leukodystrophy with macrocephaly, seizures, and psychomotor retardation. Patients with juvenile or adult forms typically experience ataxia, bulbar signs and spasticity, and a more slowly progressive course. Histologically, Alexander disease is characterized by Rosenthal fibers, homogeneous eosinophilic inclusions in astrocytes.

Disease Ontology Description A leukodystrophy that is characterized by the destruction of white matter and the formation of Rosenthal fibers consisting of abnormal clumps of protein that accumulate in astrocytes.