Abstract
In 1991, a 47-year-old male noted a mass in his left lumbar area; untreated, the mass gradually increased in size. About eight years later, a biopsy was performed at a nearby hospital. The patient was suspected of suffering from dermatofibrosarcoma protuberans (DFSP) and was subsequently referred to and hospitalized in our department. Histopathological analysis of the excised tumor confirmed DFSP-FS, which was associated with fibrosarcomatous (FS) lesions in certain regions. Since this operation, the patient has received regular follow-up. About two years after the operation, CT imaging showed a 2-cm nodular shadow in the S5 region of the left lung. Since a malignant tumor was suspected following biopsy, the left superior lobe was excised. The histological image of the lesion proved very similar to that of the FS components of the DFSP noted in the lumbar area. Hence, because distant metastasis occurs in DFSP-FS more commonly than with usual DFSP, stringent follow-up is required.
