Hi mountainmom,
I tucked it in at the end. Autism spectrum. But it isn't low VCI overall, in the subtests it is higher similarities and vocabulary combined with low comprehension. That's combined with the other higher scores and lower PSI. I ran across it in the WISC manual, but here is similar referenced through NIH: http://www.ncbi.nlm.nih.gov/pubmed/21638108

But it's a profile; so, I don't know that it is diagnostic particularly at the higher end of things.