Patient has hip effusion, fever, inability to bear weight, and elevated CRP and sedimentation rate. Doc is saying, although septic arthritis is in the differential, because of some tenderness down the thigh, they are also concerned about an extra-articular source of infection, including proximal femur s/l **osteo-**. I'm sure I need to expand this but not sure what to put since many things begin with osteo-, such as osteoporosis, osteonecrosis, osteoarthritis, etc. Doc also says as part of ...