Following genetic counseling in a family for Familial polyposis coli for a 15 year old person, APC gene mutation is present. Next step of screening is: (A) colonoscopy from now, (B) Colonoscopy from 10 years before the detection of Ca. In family, (C) Occult blood in stools every year till 30 years., (D) CECT + colonoscopy
Answer is A. If APC gene mutation is present colonoscopy done from 10 years of age.