Abstract
We report the case of a 74-year-old female who had undergone total thyroidectomy for papillary thyroid carcinoma in 1998. In March 2014, she was admitted to our hospital for surgery because a nodule in the right upper lobe, disclosed by chest computed tomography (CT) in June 2011, had enlarged. We performed a partial resection of the right upper lobe. Because the nodule was suspected of being primary lung cancer based on intraoperative rapid diagnosis, we performed right upper lobectomy with lymph node dissecsion (ND2a-1). Also, we conducted a partial resection of the right lower lobe due to the new appearance of a nodule in the right lower lobe on preoperative CT, and the nodule was diagnosed as inflammatory granuloma by intraoperative rapid diagnosis. At the time of postoperative pathological examination, the nodule of the right upper lobe was diagnosed as metastatic lung tumor from thyroid carcinoma, and the nodule of the right lower lobe was diagnosed as epithelioid cell granuloma. Incidentally, minimal pulmonary metastasis was recognized in the vicinity of the epithelioid cell granuloma. We report the interesting case of pulmonary metastatic lesions which proliferated at markedly different speeds.
