| Location |
Multiple |
| Diagnosis |
Normal - No joint effusion |
| Discussion |
One radiograph of the shoulder (A), and one of the hip (B), both with a crescent of air-density within the joint adjacent to the head of the humerus and femur respectively. The pneumoarthrogram sign is simply the finding of gas-density within the joint and signifies that no joint effusion is present. It is a reliable sign and of great value when identified. |
| Reference |
Martel W, Poznanski AK: The value of traction during roentgenography of the hip. Radiology 1970, 94:497-503. |
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