This does not precisely answer your question, but I found it interesting:
What Is Personality Disorder Not Otherwise Specified? An Old Diagnosis from DSM-IV
Quote:
Personality disorder not otherwise specified (PD-NOS), also referred to as personality disorder NOS, was a diagnostic category in the Diagnostic and Statistical Manual of Mental Disorders, fourth edition (DSM-IV-TR). This diagnostic category was reserved for a clinically significant problem in personality functioning that did not fit into any of the other existing personality disorder categories. ...
In the new Diagnostic and Statistical Manual of Mental Disorders, fifth edition (DSM-5), personality disorder not otherwise specified has been replaced by personality disorder—trait specified (PD-TS).
This diagnosis is given when you have the characteristics of a personality disorder, but you don't fully meet the criteria for any specific one. You may even have a variety of symptoms of several different personality disorders.
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Whenever I see "NOS" (Not Otherwise Specified) attached to a diagnosis, I tend to suspect the doctor felt a need (insurance? hospital policy?) to give a diagnosis in the absence of
full evidence of the disorder.
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My dog
mastered the "fetch" command. He would communicate he wanted something, and I would fetch it.