Freida L. Carson, PhD, HT(ASCP)
Department of Pathology (retired), Baylor University Medical Center, Dallas, TX

Christa Hladik, AA, HT(ASCP)^cm, QIHC
Neuropathology and Immunohistochemistry, UT Southwestern Clinical Laboratories, University of Texas Southwestern Medical Center at Dallas, TX

Keywords: combined fixatives, zenker-formol, zinc formalin, acetone, nonaqueous fixatives, transport solutions

Upon completion of this activity, you will be able to:

• identify which fixatives require postfixation washing, and identify the preferred washing agent.
• identify the fixation pigments and the conditions under which the pigment may be formed.
• identify which of the fixation pigments can be prevented and which of the fixation pigments can be removed.