Estrogen Receptor Localization in Formalin-Fixed, Paraffin-Embedded Endometrium and Endometriotic Tissues

Bur ME, Martin E. Bur, M E Bur, Greene GL, Geoffrey L. Greene, G L Greene, Michael F. Press, Press MF, M F Press
International journal of gynecological pathology : official journal of the International Society of Gynecological Pathologists · 1987 · vol. 6(2) , pp. 140–151 · doi:10.1097/00004347-198706000-00006 · PMID:3319920 · W1994602799
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Estrogen receptor staining in formalin-fixed, paraffin-embedded tissues revealed similar patterns in eutopic endometrium and most endometriotic foci, with some endometriotic glands showing diffuse staining resembling basal endometrium.

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This study utilized monoclonal estrogen receptor antibodies to localize ER expression in paraffin-embedded sections of endometrial and endometriotic tissues from twenty surgical specimens. The researchers found that the majority of endometriotic lesions mimicked the cyclic estrogen receptor expression patterns of the corresponding eutopic endometrium, particularly when the ectopic tissue could be histologically dated as being in phase with the uterus. However, cases where endometriosis could not be dated showed variable staining, including diffuse nuclear staining in glands resembling basalis tissue despite weak staining in the concurrent secretory endometrium. These findings indicate that immunohistochemical staining for estrogen receptors can support the histopathologic diagnosis of endometriosis by highlighting characteristic hormonal responsiveness in the affected tissue. This paper is centrally about endometriosis, specifically focusing on the immunohistochemical characterization of estrogen receptor localization within endometriotic lesions compared to normal endometrium.

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Abstract

Monoclonal estrogen receptor (ER) antibody and indirect immunoperoxidase techniques were used to study the immunohistochemical localization of ER in paraffin sections of 20 surgical specimens containing foci of endometriosis. The eutopic endometrium, available in 16 of 20 cases, was dated histologically and stained for ER. Specific nuclear staining was observed in glandular and stromal cells of the endometrium during the proliferative and early secretory phases. Mid and late secretory phase endometria showed only focal staining. Dating of the endometriotic tissues using morphologic criteria revealed that these were in phase with the endometrium in nine of 16 cases. In these cases the ER staining of both the endometriotic tissues and endometrium was similar. The endometriotic tissues could not be dated as either proliferative or secretory in seven cases and stained variably for ER. Diffuse nuclear staining for ER was present in the endometriotic glands of three of these cases in which the endometriotic glands morphologically resembled glands of the basalis contrasting with weak, focal staining in the corresponding eutopic secretory endometria. The majority of endometriotic tissues examined mimicked the cyclic ER expression of the eutopic endometrium and thus appeared to correspond to the morphologic appearance of the endometriotic glands. Immunohistochemical staining with monoclonal estrophilin antibodies may be helpful in supporting the histopathologic diagnosis of endometriosis.
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Estrogen Receptor Localization in Formalin-Fixed, Paraffin-Embedded Endometrium and Endometriotic Tissues - Martin E. Bur - Geoffrey L. Greene - Michael F. Press Summary Monoclonal estrogen receptor (ER) antibody and indirect immunoperoxidase techniques were used to study the immunohistochemical localization of ER in paraffin sections of 20 surgical specimens containing foci of endometriosis. The eutopic endometrium, available in 16 of 20 cases, was dated histologically and stained for ER. Specific nuclear staining was observed in glandular and stromal cells of the endometrium during the proliferative and early secretory phases. Mid and late secretory phase endometria showed only focal staining. Dating of the endometriotic tissues using morphologic criteria revealed that these were in phase with the endometrium in nine of 16 cases. In these cases the ER staining of both the endometriotic tissues and endometrium was similar. The endometriotic tissues could not be dated as either proliferative or secretory in seven cases and stained variably for ER. Diffuse nuclear staining for ER was present in the endometriotic glands of three of these cases in which the endometriotic glands morphologically resembled glands of the basalis contrasting with weak, focal staining in the corresponding eutopic secretory endometria. The majority of endometriotic tissues examined mimicked the cyclic ER expression of the eutopic endometrium and thus appeared to correspond to the morphologic appearance of the endometriotic glands. Immunohistochemical staining with monoclonal estrophilin antibodies may be helpful in supporting the histopathologic diagnosis of endometriosis.

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Condition tags

endometriosis

MeSH descriptors

Colonic Neoplasms Endometriosis Ovarian Neoplasms Receptors, Estrogen Uterine Neoplasms Adult Antibodies, Monoclonal Cell Nucleus Cell Nucleus Colon Colon Colonic Neoplasms Endometriosis Female Humans Immunoenzyme Techniques Middle Aged Ovarian Neoplasms Ovary Ovary

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