INDIANAPOLIS (AP) – Indianapolis Colts coach Chuck Pagano has been diagnosed with leukemia and could miss at least Sunday’s game against Green Bay.

The Colts announced the news Monday at a news conference with owner Jim Irsay, general manager Ryan Grigson and a doctor.

The 51-year-old Pagano is in his first season as a head coach. He was hired in January after serving as the Baltimore Ravens’ defensive coordinator.

Leukemia is a cancer of the blood cells. Symptoms can include weakness, weight loss and easy bruising or bleeding.  According to the National Cancer Institute, treatments can include chemotherapy, drugs and radiation therapy.

Pagano earned his first win Sept. 16 against the Vikings. The Colts (1-2) had a bye last weekend.