DO_rare_slim disease has feature polymicrogyria bilateral frontal polymicrogyria disease_ontology A polymicrogyria that is characterized as a symmetric and bilateral form (in both brain hemispheres) that only involves the frontal lobes without including the area located behind the Sylvius fissure or the area located behind the Rolando sulcus. Symptoms included delayed motor and language milestones; spastic (stiffness) hemiparesis (weakness in one side of the body) or quadriparesis (weakness in all four limbs of the body); and mild to moderate intellectual disability. ORDO:208444 GARD:10783 DOID:0080921 intellectual disability