NCIt definition : A rare autosomal recessive inherited neurodegenerative disorder caused by mutations
in the PLA2G6 gene. It is characterized by the development of swellings called spheroids
along the axons of the central nervous system. Signs and symptoms appear early in
life and include movement difficulties, muscle hypotonia and spasticity, and cognitive
dysfunction.;
Alternative definition : NICHD: A form of epilepsy presenting in the first years of life that is characterized
by infantile spasms; a distinct high-voltage and disorganized electroencephalogram
pattern called hypsarrhythmia; and cognitive dysfunction.;