Figure 1: H&E-stained histological sections of tumors on days 1, 6, 12, and 18 after intratumoral injection of saline, MCL only, and free 5-Fu (repeat) and single injection of 5-Fu-loaded MCL in xenograft-bearing mice (arrow indicates the blood vessels, scale bar = 200 μm). Adapted with permission from [33]. Copyright © 2013 Elsevier.