How many MSS diagnoses?

The Marshall-Smith Syndrome is an ultra-rare condition. At the moment (December 2023) there are only 65 people worldwide known to have MSS. In the last 3 years 19 new families have found the MSS Research Foundation through other families or thanks to the internet. If your child was diagnosed with Marshall-Smith syndrome or if you know someone elses child is, please contact our Foundation at linda@marshallsmith.org. More information can be found on our website marshallsmith.org