Health encyclopaedia - Alphabetical Topic List

| A | | B | | C | | D | | E | | F | | G | | H | | I | | J | | K | | L | | M |
| N | | O | | P | | Q | | R | | S | | T | | U | | V | | W | | X | | Y |

Causes of Marfan syndrome

Marfan syndrome is caused by a defective gene in one of the 46 chromosomes carrying DNA.  This gene controls the production of fibrillin, a substance essential to the creation of connective tissue in the body.

75% of cases are inherited, with the remaining 25% occurring as a spontaneous genetic mutation (with neither parent affected).