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. Persistent deficits in social communication/interaction across multiple contexts (≥3 components: social-emotional reciprocity; nonverbal communicative behaviours; developing/maintaining relationships) B. Restricted, repetitive patterns of behaviour/interests/activities (≥2 of: stereotyped/repetitive motor movements; insistence on sameness/inflexible routines; highly restricted interests; hyper/hyporeactivity to sensory input) C. Symptoms present in early developmental period (may not fully manifest until social demands exceed capacity)
Common specifiers
AWith self-injurious behaviour; Without self-injurious behaviour; Associated with a known medical or genetic condition; Mild
BWith/without accompanying intellectual impairment; With/without accompanying language impairment; Associated with a known medical or genetic condition; Associated with another neurodevelopmental, mental, or behavioural disorder
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)
BADHD (comorbid in ~50%; social deficits not as pervasive; no RRBs - code both when criteria independently met); Social anxiety disorder (fear of negative evaluation; social motivation and desire intact); Social (pragmatic) communication disorder (social deficits without RRBs - mutually exclusive with ASD)