A Pediatric Radiology textbook and Pediatric Radiology digital library
Hemophilia
Etiology: bleeding into joint -> synovial proliferation + dissolving of articular cartilage -> joint space narrowing + sclerosis
Imaging: affects knee / elbow / ankle — Initially see distension of joint capsule with dense joint effusion, periarticular osteoporosis, widened intercondylar notch due to condyle overgrowth, squaring of patella — Eventually see joint space narrowing, subchondral cyst, osteophyte, epiphyseal overgrowth + premature closure of growth plate