| Patients with chronic, large pericardial effusion may be asymptomatic but can develop cardiac tamponade precipitously. |
| Plain radiography and ultrasonography may be needed to show the presence of an effusion. |
| The most common views are the anteroposterior, lateral and axial patellar images to assess for fracture, dislocation and effusion. |
| Presence of cardiomegaly on the chest radiograph may be the only diagnostic clue and echocardiography may reveal pericardial effusion. |
| Debulking surgery left appreciable disease in the abdomen and a malignant pleural effusion. |
| Immunologic diseases such as Reiter's syndrome, rheumatoid arthritis and rheumatic fever can also cause knee effusion. |
