Fig. 3
From: Two cases of breast angiosarcoma after breast conserving surgery
a The skin nodules and color changes on the inferior side of the left breast 3 years after right breast conserving therapy. b Microscopic examination showed a solid hemorrhagic tumor composed of spindle-shaped cells with abundant mitosis (× 100 magnification). c, d Tumor cells were CD34-positive (c × 100 magnification) and focally positive for CD31 (d × 200 magnification)