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JAMA Surgery Clinical Challenge |

Pulmonary Air Crescent Sign QUIZ

Kai-Ling Lee, MD1; Hung-Hua Liang, MD2,3; Chi-Li Chung, MD1; Shi-Hsin Hsiao, MD1; Chung-Hung Shih, MD1
[+] Author Affiliations
1Division of Pulmonary Medicine, Department of Internal Medicine, Taipei Medical University Hospital, Taipei, Taiwan
2Division of General Surgery, Department of Surgery, Taipei Medical University Hospital, Taipei, Taiwan
3Department of Surgery, School of Medicine, College of Medicine, Taipei Medical University, Taipei, Taiwan
JAMA Surg. 2014;149(1):97-98. doi:10.1001/jamasurg.2013.796.
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Figure 1.

After treatment with an antifibrinolytic agent, a ball-like mass with an air crescent sign in the left upper lobe was noted.

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Figure 2.

The pathological diagnosis was moderately differentiated squamous cell carcinoma (hematoxylin-eosin, original magnification ×100).

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