3 doctors weighed in:

Is it possible for a baby to be born a dwarf and also have down syndrome? How rare is a down dwarf?

3 doctors weighed in
Dr. James Ferguson
Pediatrics
2 doctors agree

In brief: Excedingly rare

I had occasion many years ago to investigate such a situation & needed to find answers for why some kids with ds chromosomes (t21) had totally different physical features.
Run the numbers: achondroplasia (common new mutation dwarf) @ 1/15, 000 x 1/1700 (risk of ds @ 21)=1/25, 000, 000.

In brief: Excedingly rare

I had occasion many years ago to investigate such a situation & needed to find answers for why some kids with ds chromosomes (t21) had totally different physical features.
Run the numbers: achondroplasia (common new mutation dwarf) @ 1/15, 000 x 1/1700 (risk of ds @ 21)=1/25, 000, 000.
Dr. James Ferguson
Dr. James Ferguson
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