Also...how about the converse? Could my child be Borderline Personality Disorder and not Aspergers? That is to say, is it possible for a teenager to manifest symptoms of Borderline?

Please let me know what you have found out. I, also a father, have been diagnosed with Borderline Personality Disorder while my son several months ago, was diagnosed with Aspergers. I see overlapping symptoms and basically see "me" in him and remember feeling his pain when I was growing up...and even today.

I understand that psychiatrists are not generally able to recognize Asperger's Syndrome in previously undiagnosed adults. They persistently miss the condition (at a rate of about 80 percent I believe),and a consequent is often misdiagnoses. Borderline Personality Disorder is one condition associated with such misdiagnoses. Often with Borderline Personality Disorder there can be some confusion of 'self' and for unwary psychiatrists it is easy to confuse semantic-pragmatic communication impairments and their implications (i.e. difficulty relating abstract-non tangible concepts such as emotional/mood states, odd communication technique that is apparently articulate but often circumlocutory, unwillingness to make statements of certitude where there is any logical doubt as to the accuracy or truth of the statement at issue, and uncertainty around communication that appears unambiguous to people not characterized by Asperger's syndrome) as symptoms of a 'lack of consistent sense of self'. Other complications abound; over-compensatory attempts to read non-verbal language can be mis-interpreted as 'ove- sensitivity to non-verbal language' and 'social paranoia', both traits often predicted of someone suffering Borderline Personality Disorder. Communication and recall disparities between a person with asperger's syndrome and a person without, and a failure of usually functional interview techniques to accommodate the Asperger's Syndrome specific needs arising from this disparity, can lead to highly inaccurate and non-representative case-histories. Due to inexperience and lack of awareness, this can be misinterpreted by the physician as evidence of deception, a trait often predicted of persons with Borderline Personality Disorder. Arguably, once someone has been pegged with Borderline Personality Disorder, it can easily become an intractable diagnosis due to the deceptive and manipulative traits very often predicted of such a person. Arguably there is some apparent mythologizing about the condition including beliefs that such a person draws physicians into a web of very convincing and compelling deception and manipulation. It's very easy therefore to explain away anything that does not actually fit the diagnoses, as being the result of highly skilled attempts at manipulation and deception. Borderline Personality Disorder is to an extent a rather controversial diagnoses. If you do not fit predicted patterns that are central to the condition (marked pattern of intense chaotic relationships, frantic attempts to avoid being alone, perceptions of people as being all bad or all good that change in accordance with one's last interaction with the person, a belief that spatial distance effects the love or affection between two people), then a diagnoses of Borderline Personality Disorder seems a very ill fit and might be something that ought to questioned, particularly in light of a positive diagnoses of Asperger's Syndrome in one's immediate/very close consanguineous (blood) relative.