COMPANION MEETINGS History of Pathology Society   Sunday, March 18, 2012 — 3:30 p.m.   Adjunctive Technologies in Morphological Pathology: Advances in the 20th Century   Moderator: Mark R. Wick, University of Virginia Hospital, Charlottesville, VA The Development of Histochemistry in the 20th Century - Mark R. Wick, University of Virginia Hospital, Charlottesville, VA The History of Electron Microscopy as a Diagnostic Tool - Mark R. Wick, University of Virginia Hospital, Charlottesville, VA Diagnostic Immunohistochemistry in the 20th Century - Mark R. Wick, University of Virginia Hospital, Charlottesville, VA In—situ Hybridization in Diagnostic Anatomic Pathology - Mark H. Stoler, University of Virginia Health System, Charlottesville, VA