232.Hampton hump(汉普顿峰)

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There is a wedge-shaped, peripheral air-space density present (dotted white arrow) associated with filling defects in both the left and right pulmonary arteries (solid white arrows). The wedge-shaped infarct is called a Hampton hump. Without the associated emboli present, the pleural-based airspace disease could have a differential diagnosis that includes pneumonia, lung contusion, or aspiration.

Notes

contusion   /kən'tuʒn/ n. 挫伤

Extensive Reading

Pulmonary Thromboembolic Disease

Over 90% of pulmonary emboli develop from thrombi in the deep veins of the leg, especially above the level of the popliteal veins. They are usually acomplication of surgery or prolonged bed rest or cancer. Because of the dual circulation of the lungs (pulmonary and bronchial), most pulmonary emboli do not result in infarction.

Although conventional chest radiographs are frequently abnormal in patients with pulmonary embolus (PE), they demonstrate nonspecific findings, such assubsegmental atelectasis, small pleural effusions, or elevation of the hemidiaphragm. Conventional chest radiography has a high false-negative rate in detecting PE.

Chest radiographs infrequently manifest one of the “classic” findings for PE, which can include:

· Wedge-shaped peripheral air-space disease (Hampton hump) .

· Focal oligemia (Westermark sign)

· A prominent central pulmonary artery (knuckle sign)

If the chest radiograph is normal, a nuclear medicine ventilation-perfusion scan (V/Q scan) may be diagnostic. If, however, the chest radiograph is abnormal, CT is usually performed.