SMC1A Family Contact Registry: Overview of our Community.
Country
Answer Count Percent
20% 40% 60% 80% 100%
Albania 1 0.57%
Algeria 2 1.15%
Australia 4 2.3%
Austria 2 1.15%
Belarus 1 0.57%
Belgium 2 1.15%
Brazil 2 1.15%
Bulgaria 1 0.57%
Canada 7 4.02%
Chile 3 1.72%
China 2 1.15%
Cyprus 1 0.57%
Finland 1 0.57%
France 12 6.9%
Germany 6 3.45%
Ireland 1 0.57%
Israel 1 0.57%
Italy 3 1.72%
Kazakhstan 1 0.57%
Korea, South 1 0.57%
Mexico 2 1.15%
Netherlands 1 0.57%
Philippines 1 0.57%
Poland 1 0.57%
Romania 2 1.15%
Russia 9 5.17%
Saudi Arabia 1 0.57%
South Africa 4 2.3%
Spain 2 1.15%
Sweden 2 1.15%
Switzerland 1 0.57%
Tanzania 1 0.57%
Turkey 5 2.87%
Uganda 1 0.57%
United Kingdom 12 6.9%
United States 74 42.53%
Uruguay 1 0.57%
Total 174 100 %
Is the Patient diagnosed with the SMC1A mutation?
Answer Count Percent
20% 40% 60% 80% 100%
Yes 173 99.43%
Other 1 0.57%
Total 174 100 %
Is the Patient diagnosed with the SMC1A mutation? - Text Data for Other
04/30/2026 147096448 SMC
Has the Patient ever had Seizure(s)?
Answer Count Percent
20% 40% 60% 80% 100%
Yes 161 92.53%
No 8 4.6%
Not Sure 5 2.87%
Total 174 100 %
Has the Patient ever had Seizure(s)? - Text Data for Other
If yes, are the seizures hard to control?
Answer Count Percent
20% 40% 60% 80% 100%
Yes 138 79.31%
No 15 8.62%
Not Sure 5 2.87%
Doesn't Apply (No Seizures) 9 5.17%
Other 7 4.02%
Total 174 100 %
If yes, are the seizures hard to control? - Text Data for Other
12/11/2025 143535742 Depending on her health and other factors
10/07/2025 141557469 Recently started having cluster of seizures only used rescue medicine twice
08/31/2025 140418831 At first they were easy to control un like these days they become so hard to control
05/11/2023 103416304 Currently no seizures
12/11/2022 93669900 Sometimes
12/11/2022 93669779 Amanda is seizure free for six weeks then she has cluster seizures about 1-5 in a seven day period.
12/11/2022 93668646 She has only had 1 cluster in February of 2022
Do you think the Patient has typical CDLS features? 
Answer Count Percent
20% 40% 60% 80% 100%
Yes 25 14.37%
No 111 63.79%
Not Sure 32 18.39%
Other 6 3.45%
Total 174 100 %
Do you think the Patient has typical CDLS features?  - Text Data for Other
12/11/2025 143535742 Not physically but mentally yes
12/10/2025 143505629 Small stature and some mild facial features (eyebrow shape); downturned mouth; feet look like feet but toes and shape are a bit odd
08/31/2025 140418831 Some features
12/11/2022 93669746 Some
12/11/2022 93669689 To some extent
12/11/2022 93668646 A few of the lesser features