Mediolateral (A) and caudocranial (B) radiographs of the right stifle Mediolateral (A) and caudocranial (B) radiographs of the right stifle. There is evidence of joint effusion with loss of the normal patellar fat pad and caudal displacement of the fascial planes. Mediolateral (A) and caudocranial (B) radiographs of the right stifle. There is evidence of joint effusion with loss of the normal patellar fat pad and caudal displacement of the fascial planes. There is also flattening of the medial femoral condyle (black circle). Lateral is to the right of the image. Naomi Frances Earley et al. Vet Rec Case Rep 2017;5:e000517 ©2017 by British Veterinary Association