Table 1

Natural course of familial adenomatous polyposis (FAP)

StageNo of patientsAge (y)*
*Median (range).
Development of adenomas4417 (5–56)
Symptoms19634 (2–73)
Diagnosis of FAP24835 (5–73)
Diagnosis of colorectal cancer15940 (15–69)
Death from colorectal cancer4544 (27–69)