Is Crohn's disease caused by a frameshift mutation?

Frameshift mutation:

1. A frameshift mutation is a genetic mutation caused by a deletion or insertion in a DNA sequence.
2. It changes the way the sequence is read.

Crohn's disease causes:

1. Crohn's disease is a chronic disorder of the digestive system.
2. It is caused by a frameshift mutation.
3. Crohn's disease is caused by the insertion of cytosine in the gene encoding a truncated NOD2 protein.
4. This truncated NOD2 protein is found to be associated with Crohn's disease.
5. It is incurable.