Radiographic Interpretation Just below the midline of the femur we can see a radiolucent line possibly indicating a healed hairline fracture. A slight increase in radiodensity around this area may indicate callous formation from fracture healing. This distortion of the femur may be causing undue pressure on the stifle joint and corresponding ligaments, predisposing the patella to luxation. There is some increased opacity in the soft tissues around the stifle, which indicates buttressing that was found on physical exam. Abnormally lucent tissues can also been seen on the lateral radiographic view in the area of the quadriceps, possibly showing muscle atrophy. Stippling is seen on the femoral trochlea meaning there may be some degeneration of the joint.