Change:  is noted. It is likely that this patient has been an active sportsman in the past. The cause of the knee effusion is unknown.Discussion Recognition of Pellegrini-Stieda disease is a useful pattern recognition skill for radiographers who work   View changes from previous version. (Word count: 529)

Change:  is commonly associated with sporting injuries. The calcification is variable in its appearance but sufficiently characteristic in most cases to make a firm diagnosis. Comparison views of the contra-lateral knee should be discouraged. In some cases of Pellegrini-Stieda Disease, the calcification can be extensive, involving most of the MCL.   View changes from previous version. (Word count: 532)

Change: airregularityirregularity of the joint surface of the patelapatella is associated with degenerative changes(2). There is a fabella(3). There appears to be some clothing artifact. Conclusion There is Pelligrini-Stieda Disease. There is a moderately large knee effusion. There is evidence of osteoarthritis. A fabella is noted.   View changes from previous version. (Word count: 499)

Change: articular surfaceairregularity of the patellajoint issurface irregularof andthe demonstrates osteophyticpatela is changesassociated typicalwith ofdegenerative osteoarthritis(2).changes(2). There is a fabella(3). There appears to be some clothing artifact. Conclusion There is Pelligrini-Stieda Disease. There is a moderately   View changes from previous version. (Word count: 491)

Change: sequelasequelae of an old injury (or injuries) to the medial collateral ligament (MCL) of the knee. The abnormal bone growth is a form of myosotis ossificans or soft tissue calcification and is located within the superior attachment of the medial collateral ligament of the knee. Pellegrini-Stieda Disease is   View changes from previous version. (Word count: 493)

Change: therefore comparison views of the contra-lateral knee should be discouraged. In some cases of Pellegrini-Stieda Disease the calcification can be extensive, involving most of the MCL. Comparison views should be strongly discouraged. Some mild osteoarthritic marginal osteophyte formation is evident particularly at the medial femoral aspect of the knee(arrow 2).   View changes from previous version. (Word count: 493)

Change: fat padTriangle/fatpad is associated with knee joint effusion. Hoffa’s fat pad is the triangular infrapatella portion of the joint and should be an area of relative radiolucency on the lateral view (ie fat density rather than fluid density)The distention of the suprapatellar pouch by the   View changes from previous version. (Word count: 488)

Change: sequelaesequela of an old injury (or injuries) to the medial collateral ligament (MCL) of the knee. The abnormal bone growth is a form of myosotis ossificans or soft tissue calcification and is located within the superior attachment of the medial collateral ligament of the knee. Pellegrini-Stieda Disease is   View changes from previous version. (Word count: 480)

Change: supra-petallasuprapetallar pouch of the knee joint (dotted red line). In addition, there is a suggestion of additional irregular fluid density seen in Hoffa’s Triangle (1). Increased density within Hoffa’s fat pad is associated with knee effusion. Hoffa’s fat pad is the triangular infrapatella   View changes from previous version. (Word count: 480)

Change: sequelasequelae of an old injury (or injuries) to the medial collateral ligament (MCL) of the knee. The abnormal bone growth is a form of myosotis ossificans or soft tissue calcification and is located within the superior attachment of the medial collateral ligament of the knee. Pellegrini-Stieda Disease is   View changes from previous version. (Word count: 484)