UTICA- November 17, is SMS Awareness day. SMS stands for Smith-Magenis Syndrome and it's the disorder that NEWSChannel 2's Callihan Marshall's sister was diagnosed with at age 11.
Briahna Marshall is 29 years old and still lives with her parents full time.
SMS is a deletion of Chromosome 17, so mentally Bri is a toddler. According https://www.prisms.org/about-sms/what-is-sms/ , SMS occurs in one out of every 15,000 to 25,000 births and it's usually confirmed through a clinical blood test.
Some symptoms these individuals have are self-hugging, difficulty paying attention, and flipping pages in books.
Also, each individual has an obsession and Bri's happens to be phones. She will ask anyone everything about their phone.
Here's more information about the disorder: https://www.prisms.org/about-sms/what-is-sms/