Fig. 7

Histopathological findings showing that tumor cells increased in a papillary form containing an epithelial pattern (a, original magnification × 30; b, original magnification × 100; all, hematoxylin and eosin stain). Tumor cells stained positively for CD31 (c), CD34 (d), D2-40 (e), and calretinin (f), and negatively for p53 (g). The Ki-67 labeling index was < 20% (h) (c–h, original magnification × 100)