Simultaneous pulmonary metastases from colon and prostate cancer to the same lobe

Abstract

Simultaneous pulmonary metastases from different primary tumors to the same lobe are extremely rare, and we herein report the case. Surgical specimen of the pulmonary metastasis from colon cancer contained two additional nodules that were confirmed as metastases from prostate cancer. Pulmonary metastasis from prostate cancer rarely forms nodules, and there is a discrepancy in the incidence of pulmonary metastases between autopsy and clinical findings. This case suggests that different malignant tumors could simultaneously metastasize to the same pulmonary lobe, and more pulmonary metastases from prostate cancer might exist than expected.

Collision tumors of the lung: A case report of urothelial carcinoma metastasizing to renal cell carcinoma with heterotopic ossification

“…Nakamura et al. described pulmonary metastases of colon and prostate adenocarcinomas to the same lung lobe but without collision [ 29 ]. Herein, we present a case of 79-year-old man with three separate nodules of collision tumors in the right lower lung lobe consisting of two metastatic carcinomas, namely clear cell type renal cell carcinoma (RCC) and high-grade urothelial carcinoma (HGUC) of the bladder.…”