Mediolateral radiograph of the right stifle of a 12-month-old goat with a unilateral PL. The radiograph shows a severely ventrocaudally luxated patella (black arrow) with loss of trabecular pattern of the distal extremity of femur (star), probably due to trochlear ridge hypoplasia. The infra-patellar fat bad is superimposed by a joint fluid due to stifle joint effusion (white arrow).