A pervasive developmental disorder not otherwise specified (Including atypical autism) (PDD-NOS) is one of the four autistic spectrum disorders in the DSM-5 and also was one of the five disorders classified as a pervasive developmental disorder (PDD) in the DSM-IV. According to the DSM-4, PDD-NOS is a diagnosis that is used for "severe or pervasive impairment in the development of reciprocal social interaction and/or verbal and nonverbal communication skills, or when stereotyped behavior, interests, and/or activities are present, but the criteria are not met for a specific PDD" or for several other disorders. PDD-NOS includes atypical autism, because the criteria for autistic disorder are not met, for instance because of late age of onset, atypical symptomatology, or subthreshold symptomatology, or all of these. Even though PDD-NOS is considered milder than typical autism, this is not always true. While some characteristics may be milder, others may be more severe. Signs and symptoms
It is common for individuals with PDD-NOS to have more intact social skills and a lower level of intellectual deficit than individuals with other PDDs. Characteristics of many individuals with PDD-NOS are:

Communication difficulties (e.g., using and understanding language)
Difficulty with social behavior
Paranoia, a characteristic form of social anxiety, derealization, transient psychosis, and unconventional beliefs if the environment changed without further notice
Uneven skill development (strengths in some areas and delays in others)
Unusual play with toys and other objects
Repetitive body movements or behavior patterns
Preoccupation with fantasies that interfere and that are not normal to have at a certain age depending on social, cultural and religious norms.
Copra itch is a skin condition that occurs on persons handling copra who are subject to Tyrophagus longior mite bites. : 454

See also
Coolie itch
Skin lesion


== References ==