Dysferlin Deficiency

Hallo to all of you,

I am new to your forum and I do have the following question.
My problem is a permanent pain in the region of the breast musles of the right side (pectoralis etc)
My Ck is eleavted highly and a Biopsie found out that Dysferlin is reduced.
But the following blood test did not show any genetic abnormalities, so there is no dysferlinopathie.
What other reasons than genetic ones may be causing the reduction od Dysferlin.

Greeting from Vienna
Anthony