Hyperkinetic disorder is an outdated term for a psychiatric neuro-developmental condition emerging in early childhood. Its features included an enduring pattern of severe, developmentally inappropriate symptoms of inattention, hyperactivity, and impulsivity across different settings (e.g., home and school) that significantly impair academic, social and work performance.[1] It was classified in the World Health Organization's ICD-10 and was roughly similar to the "combined presentation" of attention deficit hyperactivity disorder in the American Psychiatric Association's DSM-5. However, in the ICD-11 the entry for hyperkinetic disorder no longer exists and is replaced by attention deficit hyperactivity disorder.[2]