Which diagnosis best fits duration, episodicity, and exclusions?
A
Stereotypic movement disorder
Repetitive, seemingly driven, and apparently purposeless motor behaviour (e.g. hand shaking/waving, body rocking, head banging, self-biting, hitting own body)
AA. Repetitive, seemingly driven, and apparently purposeless motor behaviour (e.g. hand shaking/waving, body rocking, head banging, self-biting, hitting own body) B. Interferes with social, academic, or other activities and may result in self-injury C. Onset in the early developmental period
BA. Criteria met for major or mild NCD (substantial or modest cognitive decline in ≥1 domain) B. Insidious onset and gradual progression in ≥1 cognitive domain (most often episodic memory early) C. Probable AD: genetic mutation or ≥2 declining domains + no mixed aetiology; Possible AD: no genetic evidence or insufficient domains or mixed aetiology present
Common specifiers
AWith self-injurious behaviour; Without self-injurious behaviour; Associated with a known medical or genetic condition; Mild
BMild NCD due to AD; Major NCD due to AD; With behavioural disturbance; Early onset
Differential flags
ATic disorders (sudden, rapid, brief; premonitory urge; suppressible with effort; wax and wane); OCD (ego-dystonic; anxiety-driven compulsions; not rhythmic); ASD (may coexist - code separately if ID criterion met independently)