Tom Landry's family confirmed Thursday that the former Dallas Cowboys coach has not entered remission in his battle against leukemia.
The family released a statement saying Landry was in Baylor University Medical Center "as patients at this stage of treatment are susceptible to infection."
"While he has not yet gone into remission, the family remains optimistic that the treatment will be successful," the statement said.
Former Cowboys quarterback Roger Staubach was quoted in USA Today as saying Landry hadn't responded to chemotherapy as doctors had hoped.
Landry, 75, has been under treatment since May for acute myelogenous leukemia, known as AML.
Tests showed in August that the disease had at least been brought to the stage of temporary remission but that more treatments were necessary.
"Chemo is the medicine for the type of leukemia he's got," Staubach told the newspaper. "When it gets him into remission, they don't know."
The newspaper said Landry, who led the Cowboys to five Super Bowl appearances and two victories, was too weak to attend a banquet last week during which he and Staubach were honored with Lifetime Achievement awards. Landry also canceled an appearance Thursday in Dallas.
Leukemia is a cancer in which abnormal white cells proliferate in the bone marrow, crowding out healthy blood cells. Other organs, such as the liver, spleen or lymph nodes, might stop functioning properly if infiltrated by the cancerous cells.
Leukemia is curable, with transfusions, anti-cancer drugs and radiation therapy.
Landry ran the Cowboys for 29 years, beginning with the initial season of the franchise in 1960. His final season was 1988, and he was fired after Jerry Jones bought the team in 1989.
He is the third in NFL history with 270 victories.
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