Back جون لانغدون داون Arabic جون لانجدون داون ARZ Джон Лангдън Даун Bulgarian John Langdon Haydon Down Catalan John Langdon Down Czech John Langdon Down Danish John Langdon Down German John Langdon Down Spanish John Langdon Down Basque جان لانگدان داون Persian
John Langdon Down | |
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| Born | John Langdon Haydon Down 18 November 1828 |
| Died | 7 October 1896 (aged 67) Teddington, Middlesex, England |
| Alma mater | London Hospital Medical College |
| Occupation | Medical doctor |
| Known for | First to describe Down syndrome |
| Children | 4 |
John Langdon Haydon Down (18 November 1828 – 7 October 1896) was a British physician best known for his description of the genetic condition now known as Down syndrome, which he originally classified in 1862. He is also noted for his work in social medicine and as a pioneer in the care of mentally disabled patients.[1]