Abstract
We report a case of solitary fibrous tumor (SFT) of the pleura. A 77-year-old man with bladder cancer, who underwent SFT resection 25 years ago, was referred for the treatment of a lung tumor and mediastinal lymph node swelling. Although the mediastinal lymph nodes showed high-level accumulation of FDG, the lung tumor showed no accumulation. We resected the tumor in 2008, and it turned out to be nylon thread from the surgery that had been performed 25 years ago which had adhered to the tumor, and the tumor was diagnosed as SFT pathologically. Four years later, local relapse of the tumor was observed, and we resected the tumor again. The tumor relapsed after a long time, and the tumor doubling time before resection was one month. His pathological specimen rarely showed mitosis or malignant manifestations described in other papers. However, it showed high immunoreactivity for Ki-67, a tumor proliferation marker.
