Borderline Autism vs Atypical Autism

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In terminology particullary Autism terms, I heard about Borderline Autism and Atypical Autism. Borderline means has some symptoms of a complete condition but incompletley meets that criteria. In specific, I saw that borderline means the same symptons but much milder than Classic Autism. The term, Atypical as in Atypical Autism aka PDD-NOS, is also defined as one who has autistic characteristics but meets the incomplete criteria for an official ASD. That is where I get confused in the difference Borderline and Atypical. I kind of see a little difference with Atypical being defined as symptons of a condition being unusual and abnormal compared to the classical condition. For example someone who has every characteristic of Aspergers Syndrome except he has mild intellectual disability (mild mental retardation), would be unexpected and unusual for someone who has Aspergers Syndrome. That person would have ATYPICAL Aspergers. Another example would be that Rett Syndrome, a girls only condition, occuring in a boy, which would be Atypical Rett Syndrome.Is there any difference between the terminologies Atypical and Borderline? And if there is what Is the difference between Borderline and Atypical? And is there distinction between Atypical Autism, aka PDD-NOS, and Borderline Autism?

Atypical Autism is an official diagnosis under the ICD-10 manual

http://apps.who.int/classifications/app ... ?gf80.htm+
"F84.1 Atypical autism
A type of pervasive developmental disorder that differs from childhood autism either in age of onset or in failing to fulfil all three sets of diagnostic criteria. This subcategory should be used when there is abnormal and impaired development that is present only after age three years, and a lack of sufficient demonstrable abnormalities in one or two of the three areas of psychopathology required for the diagnosis of autism (namely, reciprocal social interactions, communication, and restricted, stereotyped, repetitive behaviour) in spite of characteristic abnormalities in the other area(s). Atypical autism arises most often in profoundly ret*d individuals and in individuals with a severe specific developmental disorder of receptive language. "




As far as I know Borderline Autism is a colloquial term, so it can be used for whatever people want it to be.

Agreed with the above post.
I see "borderline autistic" being used as a synonym for someone with autistic traits, but I suppose it could mean anything.
Atypical autism isn't an official diagnosis under the DSM, but as you said, it used to be - it would have been PDD-NOS. It wasn't used in conjunction with another diagnosis though, it was its own separate diagnosis. So, for example, one would not have been diagnosed with "atypical Aspergers" (at least not officially). Instead, they likely would've just been given PDD-NOS (or Aspergers, whichever criteria they met). So it technically doesn't exist if you go by the DSM-V. I don't usually hear people using the term anymore.

Hope that clears up your confusion though!

These "older" ( and foreign) diagnostic names makes me wonder how many more (or less) names will be used in the future for the various aspects of the autistic spectrum?

_________________
An Asperger's man who has Autism Spectrum Disorder level 1- mild, with a sprinkling of Synesthesia.

To me borderline autism means someone has autistic traits that impair them and they scored between autism and normal on the autism tests for an evaluation. The traits don't need to be mild, they can be severe too but the diagnoses is given because they need the service and the help for their traits so it's treated as they have it.