Change: This is an uncommon site for a bipartite patella (more commonly sited supero-lateral). There is possibly a small joint effusion (see Hoffa's fat pad and the suprapatellar pouch) There is no obvious soft tissue swelling overlying the patella but   View changes from previous version. (Word count: 1859)

Change: This is an erect lateral knee. A lipohaemarthrosis is demonstrated. This is a potentially useful view for subtle lipohaemarthrosis because there is no superimposed quadriceps tendon. Its usefulness is limited by the likelihood that a patient with a knee fracture will not mobilise readily. Lipohaemarthrosis Case Study This patient   View changes from previous version. (Word count: 1845)

Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 1816)

Change:  There is moderately severe extra-capsular soft tissue swelling (top white arrow). Hoffa's triangle is abnormally opaque. Given the lack of evidence of a knee joint effusion, this is likely to be overlying opacity from the extra-capsular knee swelling. There is considerable artifact from the   View changes from previous version. (Word count: 1791)

Change: Hall (2) correlated the size of knee effusions on plain film with the amount of aspirated fuid. Width of Base of Suprapatellar Pouch Knee joint Aspiration Volume (ml) <5 mmo5- 10mm1 to 9ml10mm or greater10ml or greater Extra-Articular Swelling This patient's history   View changes from previous version. (Word count: 2159)

Change: goesguess is as good as mine (probably better) Ruptured Quadriceps Femoris Tendon The quadriceps femoris tendon attaches the quadriceps muscle to the patella. This patient has had an unknown injury to the knee causing rupture of the quadriceps femoris tendon. Note the unusual low position   View changes from previous version. (Word count: 2008)

Change: This patient has a knee effusion. Note the fluid in the suprapatellar pouch and in Hoffa's fat pad (black arrows). Note also that the patella   View changes from previous version. (Word count: 2004)

Change: There were only format changes (bold, italics, etc.) in this version. See this version for details. (Word count: 1875)

Change: and DRimaging, clothing and particularother artifacts will tend to demonstrate clothing andbe other artifacts.demonstrated. The black arrow points to vascular calcification The white arrow identifies skin folds (the patient may have lost weight recently) The grey arrow points to the patient's sock Prepatellar Bursitis This patient   View changes from previous version. (Word count: 1785)

Change:  There is moderately severe extra-capsular soft tissue swelling (top white arrow). Hoffa's triangle is abnormally opaque. Given the lack of evidence of a knee joint effusion, this is likely to be overling opacity from the extra-capsular knee swelling. There is considerable artifact from the   View changes from previous version. (Word count: 1783)