Fig. 4
From: Role of ultrasound in the diagnosis of primary and recurrent dermatofibrosarcoma protuberans
A 61-year-old man with recurrent and metastatic DFSP. A, B, An ovoid nodule with poor blood flow at and near the old scar on the back was observed 7 years after surgery. C, D, Multiple retroperitoneal metastases of DFSP with rich blood flow were detected over three years of follow-up after a second wide local excision. E, H&E staining (200×) showing spindle cells in the retroperitoneal mass arranged in a storiform pattern. F, Immunohistochemical staining was positive for CD-34 (original magnification 200×)