If your child has been diagnosed with autism, you've probably navigated a whirlwind of appointments, assessments, and advice. But here's something important that many parents—and even some doctors—might miss: autism can sometimes be caused by an underlying genetic condition that requires completely different treatment approaches. A major new study is shining a light on one such condition, and it could change how we think about diagnosis in Singapore and across Asia.
What Is Phelan-McDermid Syndrome?
Phelan-McDermid syndrome (PMS) is a rare genetic disorder caused by changes in a specific gene. Children with PMS often show symptoms similar to autism—difficulty with speech, social interaction, and learning—but the condition itself needs targeted medical care that general autism support alone may not provide. Think of it like this: if your car's engine light comes on, you need to know whether it's low oil or a transmission problem. The warning signs look similar, but the fix is completely different.
The Big Discovery
Researchers conducted a comprehensive analysis and found that PMS may affect about 1 in 7,300 people—roughly 10 times more common than previously estimated. In the United States alone, this could mean more than 45,000 people have the condition. Yet thousands of these cases remain hidden because genetic testing simply isn't being done.
Here's the troubling part: many children receive an autism diagnosis and stop there. Parents and doctors may never discover that an underlying genetic condition is responsible. It's like treating a fever without investigating whether it's a common cold or something that needs antibiotics.
Why This Matters for Singapore Families
In Singapore, we pride ourselves on excellent healthcare, but genetic testing for conditions like PMS isn't standard practice during autism assessment. This means many Singaporean families might be missing a crucial piece of their child's diagnosis puzzle. The implications are significant:
- Treatment options: Targeted therapies for PMS are entering clinical trials. If your child has PMS rather than autism alone, they could benefit from these emerging treatments—but only if the condition is identified.
- Family planning: PMS is genetic, so if one child has it, parents may want genetic counselling for future pregnancies. Without diagnosis, families don't have this information.
- Medical monitoring: Children with PMS sometimes have related health issues (like seizures or digestive problems) that need specific attention. General autism support won't address these.
What Should Singapore Parents Do?
The researchers are essentially saying: don't assume an autism diagnosis is the complete answer. It's time for more thorough genetic screening, especially in children who show developmental delays alongside autism features.
Across Asia, where genetic testing infrastructure is still developing, this research is particularly relevant. Our region could benefit from updated guidelines that include genetic screening as part of standard autism assessment.
Three Practical Steps for Your Family
- Ask your paediatrician or child specialist about genetic testing. If your child has been diagnosed with autism, ask specifically whether genetic screening for conditions like Phelan-McDermid syndrome has been considered. It's a fair question to raise.
- Keep detailed medical records. Document any speech delays, developmental milestones, seizures, digestive issues, or other health concerns. These details help specialists spot patterns that might point to an underlying genetic condition.
- Connect with parent communities. Local autism and special needs groups in Singapore often share information about newer diagnostic approaches. Peer experiences can help you ask the right questions of your medical team.
Your child's diagnosis should be as complete and accurate as possible. That's not just about labelling—it's about unlocking the right support and treatments for their future.