Diffuse Cerebral Sclerosis of Schilder/diagnosis; Diffuse Cerebral Sclerosis of Schilder/pathology; Status Epilepticus/diagnosis; Status Epilepticus/pathology; Anemia/diagnosis; Anemia/pathology; Anemia/physiopathology; Child, Preschool; Developmental Disabilities/diagnosis; Developmental Disabilities/pathology; Developmental Disabilities/physiopathology; Diagnosis, Differential; Diffuse Cerebral Sclerosis of Schilder/physiopathology; Female; Humans; Immunohistochemistry; Liver Diseases/diagnosis; Liver Diseases/pathology; Liver Diseases/physiopathology; Magnetic Resonance Imaging; Mitochondria/enzymology; Muscle Fibers, Skeletal/chemistry; Muscle Fibers, Skeletal/pathology; Muscle Hypotonia/diagnosis; Muscle Hypotonia/pathology; Muscle Hypotonia/physiopathology; Optic Atrophy/diagnosis; Optic Atrophy/pathology; Optic Atrophy/physiopathology; Prostaglandin-Endoperoxide Synthases/analysis; Seizures/diagnosis; Seizures/pathology; Seizures/physiopathology; Status Epilepticus/physiopathology