Adenomatous Polyposis Coli/diagnosis; Colorectal Neoplasms, Hereditary Nonpolyposis/diagnosis; Exome/genetics; Genetic Predisposition to Disease; Intestinal Polyposis/congenital; Neoplastic Syndromes, Hereditary/diagnosis; AMP-Activated Protein Kinase Kinases; Adaptor Proteins, Signal Transducing/genetics; Adenomatous Polyposis Coli/genetics; Adenomatous Polyposis Coli Protein/genetics; Adenosine Triphosphatases/genetics; Adult; Bone Morphogenetic Protein Receptors, Type I/genetics; Colorectal Neoplasms, Hereditary Nonpolyposis/genetics; DNA Glycosylases/genetics; DNA Repair Enzymes/genetics; DNA-Binding Proteins/genetics; Female; Genetic Testing; Humans; Intestinal Polyposis/diagnosis; Intestinal Polyposis/genetics; Male; Microsatellite Instability; Mismatch Repair Endonuclease PMS2; MutL Protein Homolog 1; MutS Homolog 2 Protein/genetics; Neoplastic Syndromes, Hereditary/genetics; Nuclear Proteins/genetics; PTEN Phosphohydrolase/genetics; Protein Serine-Threonine Kinases/genetics; Sequence Analysis, DNA; Smad4 Protein/genetics; Young Adult