I am quite sure that there is no literature stating that cc is hereditary, in fact, they had told my family and I that it was not. My father, Jim was diagnosed @ 38 y.o. 22 years ago and then 4 years ago my Aunt Cheryl, dad’s sister was diagnosed. How devastating to all of us. Then, starting @ the age of 30 yo, the docotors recommened yearly prophylactic blood work and MRCP’s for myself, my siblings and Cheryl’s sibling and her children. Even if there was a gene that could be pinpointed, I wouldn’t want to know if I carry that gene, because it is not proven that even if you have the gene, that you will develope the cancer. I send out my prayers to you all and hope the benefit I am running will help to save lives and give you all some answers!!!!! Love and Blessings of Strength, Tracer