Differential diagnosis and cancer staging of a unique case with multiple nodules in the lung - lung adenocarcinoma, metastasis of colon adenocarcinoma, and colon adenocarcinoma metastasizing to lung adenocarcinoma.
Lung cancer is the most common cancer in the world. Despite this, there have been few cases of simultaneous primary and metastatic cancers in the lung reported, let alone coexisting with tumor-to-tumor metastasis. Herein, we describe an extremely unusual case. A 61-year-old man with a history of colon adenocarcinoma was revealed as having three nodules in the lung 11 months after colectomy. The nodule in the left upper lobe was primary lung adenocarcinoma, the larger one in the right upper lobe was a metastasis of colon adenocarcinoma, and the smaller one in the right upper lobe was colon adenocarcinoma metastasizing to lung adenocarcinoma. Our paper focused on the differential diagnosis and cancer staging of this unique case, and discussed the uncommon phenomenon of the lung acting as a recipient in tumor-to-tumor metastasis.
Department of Pathology, Peking University First Hospital Bejing, China.
Yun
Y
Bai
Department of Imaging, Peking University First Hospital Bejing, China.
Jianxing
J
Qiu
Department of Thoracic Surgery, Peking University First Hospital Bejing, China.
Xueqian
X
Shang
Department of Pathology, Peking University First Hospital Bejing, China.
Ping
P
Liu
Department of Pathology, Peking University First Hospital Bejing, China.
Ying
Y
Zhang
Department of Pathology, Peking University First Hospital Bejing, China.
Ying
Y
Wang
Department of Pathology, Peking University First Hospital Bejing, China.
Yan
Y
Xiong
Department of Pathology, Peking University First Hospital Bejing, China.
Ting
T
Li
Lung; metastatic adenocarcinoma; primary adenocarcinoma; tumor-to-tumor metastasis