Implementation and Evolution of a Primary Care-Based Program for Adolescents and Young Adults on the Autism Spectrum.

Current primary care models are inadequate for adults on the autism spectrum. The Center for Autism Services and Transition (CAST) clinic was developed in 2014 using feedback from parents of adults on the autism spectrum and patient-centered medical home principles. We evaluated the reach of CAST's services. As of January 2021, 858 patients were seen in CAST. Many continue to receive primary care from the CAST clinic. The program has undergone staffing changes but continues to accept new patients. We have added services such as "happy visits," pre-procedure videos, and telehealth visits. CAST provides one example of how to improve primary care for adults on the autism spectrum. More research is needed to assess the effectiveness of the CAST model.

Recurrent deletions and reciprocal duplications of 10q11.21q11.23 including CHAT and SLC18A3 are likely mediated by complex low-copy repeats.

We report 24 unrelated individuals with deletions and 17 additional cases with duplications at 10q11.21q21.1 identified by chromosomal microarray analysis. The rearrangements range in size from 0.3 to 12 Mb. Nineteen of the deletions and eight duplications are flanked by large, directly oriented segmental duplications of >98% sequence identity, suggesting that nonallelic homologous recombination (NAHR) caused these genomic rearrangements. Nine individuals with deletions and five with duplications have additional copy number changes. Detailed clinical evaluation of 20 patients with deletions revealed variable clinical features, with developmental delay (DD) and/or intellectual disability (ID) as the only features common to a majority of individuals. We suggest that some of the other features present in more than one patient with deletion, including hypotonia, sleep apnea, chronic constipation, gastroesophageal and vesicoureteral refluxes, epilepsy, ataxia, dysphagia, nystagmus, and ptosis may result from deletion of the CHAT gene, encoding choline acetyltransferase, and the SLC18A3 gene, mapping in the first intron of CHAT and encoding vesicular acetylcholine transporter. The phenotypic diversity and presence of the deletion in apparently normal carrier parents suggest that subjects carrying 10q11.21q11.23 deletions may exhibit variable phenotypic expressivity and incomplete penetrance influenced by additional genetic and nongenetic modifiers.