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- Case Report -

A Case of Solid Predominant Lung Adenocarcinoma Without Mucin Production Spread Through the Air Spaces Showing Consolidation

Hitoshi Suzuki¹, Shin Shomura¹, Masaki Yada¹, Akira Shimamoto², Itsuo Kusano³, Chiaki Kondo^1
1Department of Thoracic Surgery, Mie Prefectural General Medical Center, Japan, ²Department of Thoracic and Cardiovascular Surgery, Graduate School of Medicine, Mie University, Japan, ³Department of Pathology, Mie Prefectural General Medical Center, Japan

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Background. Lepidic predominant or invasive mucinous adenocarcinoma has been recognized to sometimes show consolidation on chest CT scans. We herein report a case of solid predominant lung adenocarcinoma which spread through the air spaces (STAS) showing air-space consolidation. Case. A 48-year-old man was admitted to our hospital because of hemosputum. A chest computed tomogram showed consolidation in the right upper lung field. Bronchofiberscopy detected bleeding from the right B¹ bronchi, and the observed consolidation was thus considered to be due to aspiration. However, a CT scan taken 1 month later revealed an enlargement of the consolidation, and therefore an operation was performed. The pathologic diagnosis was solid predominant lung adenocarcinoma STAS showing consolidation. Conclusion. This is considered to be a rare case in which consolidation was deemed to be due to alveolar hemorrhaging and cancer cells had diffusely spread through the air spaces.
key words: Solid predominant lung adenocarcinoma, Consolidation, Spread through air space (STAS)

Received: January 30, 2017
Accepted: May 8, 2017

JJLC 57 (4): 315-319, 2017