RT Book, Section A1 Weiss, Robert A. A1 Weiss, Margaret A. A1 Beasley, Karen L. SR Print(0) ID 1175620007 T1 Histology T2 Sclerotherapy and Vein Treatment, 2e YR 2012 FD 2012 PB McGraw Hill LLC PP New York, NY SN 9780071485425 LK dermatology.mhmedical.com/content.aspx?aid=1175620007 RD 2023/03/21 AB It is useful to understand the histology of normal and pathologic veins and venous valves because the structure of the vein determines its normal mode of function as well as its common modes of failure. It is also important to understand the zones that must be injured in order to permit sclerosis and closure of veins.