Figure 1From: Primary tumors of the patellaPatellar giant cell tumor. (A, B) An enlargement of the cystic lesion in the patella and a bone translucency with peripheral rim change can be seen at the lateral down part of the patella on radiographs. (C, D) CT indicates that there is a well-defined lytic lesion with the thin cortex occupying two-thirds of the patella.Back to article page