153935.fig.003a
(a)
153935.fig.003b
(b)
153935.fig.003c
(c)
153935.fig.003d
(d)
Figure 3: Estimation of submucosal vascular density of laterally spreading tumors (LSTs): all the vessels ≥5 μm in diameter were counted and arterioles and venules were distinguished. (a) A typical case of LST-nongranular (LST-NG) type with higher vascular density (56.3 vessels/mm²) than (b) a LST-granular (LST-G) type with 31.7 vessels/mm². (c) The double staining with Factor VIII + Elastica van Gieson has facilitated the identification of arterioles and venules for LST-NG and for (d) LST-G, original magnification ×20.