If your born with it...then by definition it is hereditary.

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Hereditary
he·red·i·tar·y Pronunciation
adj.
1. Law
a. Descending from an ancestor to a legal heir; passing down by inheritance.
b. Having title or possession through inheritance.
2. Transmitted or capable of being transmitted genetically from parent to offspring: a hereditary disease.
3.
a. Appearing in or characteristic of successive generations.
b. Derived from or fostered by one's ancestors: a hereditary prejudice.
4. Ancestral; traditional: their hereditary home. See Synonyms at innate.
5. Of or relating to heredity or inheritance.