レット症しょう候こう群ぐんMeanings1nounRett syndromemedicineA rare genetic neurological disorder that primarily affects girls, leading to severe cognitive and physical impairments.レット症しょう候こう群ぐんは、主おもに女じょ児じに発はっ症しょうする神しん経けい発はっ達たつ障しょう害がいです。Rett syndrome is a neurodevelopmental disorder that mainly affects girls.