The possibility still exists that Shawn Andrews wasn't just being emotional, after all. Despite Eagles coach Andy Reid's repeated assertions that he expects Andrews to be ready for the start of the regular season, Sept. 9 at Green Bay, medical sources say there is a prospective diagnosis that fits Andrews' "tear-jerker" assessment of what he was told by an ankle specialist last week. In his conversation with reporters Wednesday, Andrews was asked about his rehab, and he mentioned using a bone stimulator. According to medical sources, there are only two reasons why Andrews would use bone stimulation, an unhealed fracture, which is unlikely, or osteonecrosis, also known as avascular necrosis. Osteonecrosis would mean that a section of bone involved in Andrews' 2004 fibula repair has not been getting an adequate blood supply and is deteriorating. Most likely the talus bone, a small bone in the ankle, would be affected, a medical source said. The condition is treatable, but if it is serious enough, the treatment would be a bone graft, the source said, which would sideline Andrews for the season.