Patients with biliary tract cancers may present with symptoms such as jaundice, dark urine, clay-colored stool, abdominal pain, fever, pruritus, nausea and vomiting, and weight loss. Diagnostic evaluation includes liver function tests and other laboratory testing, along with various imaging methods -- CT, MRI, ultrasound.

Several of Moss' former teammates in Minnesota paid their respects to the recovering Hall of Famer before the Vikings' win Monday night.

NFL Hall of Fame wide receiver Randy Moss told fans worried about his health that he's a "cancer survivor" in an Instagram livestream Friday afternoon.