Figure 2
CD90 staining of cancer-associated stromal cells. (a) CD90 staining of tissue specimen 99-068D shows increased reactivity localized to the tumor foci. Staining in non-cancer is restricted to a cell layer adjacent to the basal epithelium. Blood vessels are also positive for CD90. Original magnifications are indicated in the individual photomicrographs. (b) The transition zone cancer, 04-023, contained both tissue without benign glands (top panels) and cancer-rich tissue with scattered benign glands (bottom left). The tumor cells in 04-023C are stained by CD26 (top left). 01-180C contained a large tumor focus with crowded glands. Original magnification × 40.
