World Down Syndrome Day

John Langdon Down (1866)

• English physician working at Royal Earlswood Asylum
• Published a paper in 1866 describing a group of children with similar physical features and intellectual disability.
• He called the condition “Mongolian idiocy” (obsolete and offensive term used at the time).
• This was the first clinical description of Down syndrome.

 

The first scientific description of Down syndrome was published by John Langdon Down in 1866. 

                                                    CLASSIFICATION OF IDIOTS 

 

 

 

Jérôme Lejeune

• Worked in Paris with Marthe Gautier and Raymond Turpin
• Discovered that affected individuals have 47 chromosomes instead of 46.
• Identified extra chromosome 21 → Trisomy 21

 

 

 

This was one of the first times a human disease was linked to a chromosomal abnormality. 

 

 

 

 

                                                                            Current Events

 

 

 

 Snapshot