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. 2011 May 31;4(2):88–94. doi: 10.3342/ceo.2011.4.2.88

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Copyright © 2011 by Korean Society of Otorhinolaryngology-Head and Neck Surgery.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Fig. 1 — Immunohistochemistry in squamous cell carcinoma of the tonsil. Matrix metalloproteinase (MMP)-2 and 13 and tissue inhibitors of metalloproteinase (TIMP)-1 and 2 immunostaining were observed in tumor cells and/or stroma but MMP-9 immunostaining was observed in tumor cells only (×400). (A) MMP-2 immunostaining in tumor cells. (B) MMP-2 immunostaining in stroma. (C) MMP-9 immunostaining in tumor cells. (D) MMP-13 immunostaining in tumor cells. (E) MMP-13 immunostaining in stroma. (F) TIMP-1 immunostaining in tumor cells. (G) TIMP-1 immunostaining in stroma. (H) TIMP-2 immunostaining in tumor cells. (I) TIMP-2 immunostaining in stroma.