A case of nodular fasciitis which occurred in the drain insertion part after thoracoscopic surgery

Abstract

A 64-year-old woman had received thoracoscopic partial lung resection for lung metastasis of colorectal cancer. A left chest wall tumor was noted during observation after the operation. Since it increased gradually and malignancy could not be ruled out, chest wall tumor extirpation was performed. The hemispherical tumor was covered with the parietal pleura and intercostal muscle, and existed on the scar of drain insertion during the previous thoracoscopic operation. Pathological examination revealed spindle cells with fusiform nuclei proliferating in a fascicular pattern. Immunohistochemical staining showed that spindle cells were positive for SMA and vimentin. The final pathological diagnosis was nodular fasciitis.