Anteromedial pneumothoraces 可以分成兩種：
1. Superior type - hilum 以上，
2. Inferior type - hilum 以下。
A superior anteromedial pneumothorax may result in visualization of the superior vena cava or azygos vein on the right.
An inferior anteromedial pneumothorax may be evidenced by delineation of the heart border and a lucent cardiophrenic sulcus〔見下圖〕.
Notice the increased lucency of the cardiophrenic sulci in this patient with bilateral inferior anteromedial pneumothoraces〔注意看右邊heart border超明顯〕.
A CT scan confirms the diagnosis.
圖片來源：
University of Virginia Health Sciences Center, Department of Radiology
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