Diagnostic Criteria for 299.80
Rhett's Disorder
A. All of the following:
(1)
apparently normal prenatal and perinatal development
(2)
apparently normal psychomotor development through the
first 5 months after birth
(3)
normal head circumference at birth
B. Onset
of all of the following after the period of normal development:
(1)
deceleration of head growth between ages 5 and 48 months
(2)
loss of previously acquired purposeful hand skills between ages 5
and 30 months with the subsequent development of stereotyped hand
movements (e.g., hand-wringing or hand washing)
(3)
loss of social engagement early in the course
(although often social interaction development later)
(4)
appearance of poorly coordinated gait or trunk movement
(5) severely impaired expressive and receptive language
development with severe psychomotor retardation.
299.80 Pervasive
Developmental Disorder
(PDD-NOS)
Not Otherwise Specified (Including Atypical Autism)
This category should be used when there is a severe and pervasive
impairment in the development of reciprocal social interaction or
verbal and
nonverbal communication skills, or when stereotyped
behavior, interests and activities are present, but the criteria are
not met for a specific Pervasive Development Disorder, Schizophrenia,
Schizoptypal Personality Disorder, or Avoidant Personality Disorder.
For example this category includes "atypical autism"
- presentations
that do not meet the criteria for Autistic Disorder because of late
age at onset, atypical symptomatology, or subthreshold symptomatology,
or all of these.
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