2018 Volume 32 Issue 4 Pages 523-528
We report a case of pulmonary collision cancer consisting of squamous cell carcinoma and small cell carcinoma. A 72-year-old male was admitted to our hospital with general malaise. Chest computed tomography showed a snowman-shaped mass (41×35 mm) in the right lower lobe. On CT-guided biopsy, the caudal part of the tumor was punctured, and the resulting diagnosis was squamous cell carcinoma. The patient underwent right lower lobectomy. Pathological examination revealed collision cancer consisting of squamous cell carcinoma and small cell carcinoma. When encountering a snowman-shaped pulmonary mass, the possibility of lung collision cancer should be considered.
