Please see Freida Carson's Histotechnology-A self Instructional text (2nd edition pg 98, or 3rd edition pps 117-118). There you will find that the correct answer is "A"- 37-40 % formaldehyde. In the Notes section she explains "Many laboratories use acetone or alcohol as the fixative for frozen section; however, concentrated formaldehyde yields morphologic preservation more like that seen in permanent sections. Fixation in alcoholic formalin is also good" Since the question asks for "optiomally" fixed, the correct answer would be "A" and not "D"
hope this helps. AmySue Ruppert,HT(ASCP) MB(ASCP) Marshfield Labs,Histology ______________________________________________________________________ The contents of this message may contain private, protected and/or privileged information. If you received this message in error, you should destroy the e-mail message and any attachments or copies, and you are prohibited from retaining, distributing, disclosing or using any information contained within. Please contact the sender and advise of the erroneous delivery by return e-mail or telephone. Thank you for your cooperation.
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