Sections View Full Chapter Figures Tables Videos Annotate Full Chapter Figures Tables Videos Supplementary Content Download Section PDF ++ Written by ++ Michael Laposata, M.D., Ph.D ++ Professor and Chairman ++ Department of Pathology ++ University of Texas Medical Branch ++ Galveston, TX ++ ++ Peter McCaffrey, MD ++ Assistant Professor ++ Department of Pathology ++ University of Texas Medical Branch ++ Galveston, TX