Patau Pataus - Edward Edwards - Down Downs - What is the correct Trisomy Syndrome name?

Trisomy Syndromes named after the Physician who described the genetic disorder. A trisomy is a type of polysomy in which there are three instances of a particular chromosome, instead of the normal two. A trisomy is a type of aneuploidy
(an abnormal number of chromosomes). https://en.wikipedia.org/wiki/Trisomy Trisomy 13 Patau Syndrome https://en.wikipedia.org/wiki/Klaus_Patau

https://en.wikipedia.org/wiki/Patau_syndrome Trisomy 18 Edwards Syndrome https://en.wikipedia.org/wiki/John_H._Edwards https://en.wikipedia.org/wiki/Edwards_syndrome Trisomy 21 Down Syndrome https://en.wikipedia.org/wiki/John_Langdon_Down https://en.wikipedia.org/wiki/Down_syndrome The internet has many confused folks writing what they will...

Here the are correct terms for the trisomy 13, 18 and 21 Syndromes. Patau, Edwards and Down. Only Edwards has an S.
You'll see many switching these names up with and or without the S but the correct terms for these are - Patau Syndrome, Edwards Syndrome and Down Syndrome.