Jim O’Connell was pushing 88 when he realized something might be amiss. Though he walked to church every day and was healthy enough to do his own yard work, his gut wasn’t quite right. And he was losing weight.
http://www.curetoday.com/publications/cure/2015/fall-2015/the-vulnerable-zone-adjusting-cancer-care-for-older-patients
The Vulnerable Zone: Adjusting Care for Older Patients With Cancer