Lytic lesion in the distal femur.
D000038:Abscess / Q000175:diagnosis*; D001847:Bone Diseases / Q000175:diagnosis / Q000473:pathology*; D002648:Child; D003937:Diagnosis, Differential; D005260:Female; D005269:Femur / Q000473:pathology*; D006801:Humans; D007718:Knee Injuries / Q000150:complications*; D011859:Radiography; D013203:Staphylococcal Infections / Q000175:diagnosis*