Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone

Objective Mifepristone has been used to treat endometriosis, but it can cause a constellation of endometrial alterations. Our study investigated the effects of long-term mifepristone on ovarian endometriosis. Methods We retrospectively analyzed the clinicopathological changes of ovarian endometriosi...

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Main Authors: Yongmiao Pan, Tingting Wu, Haiyan Shi
Format: Article
Language:English
Published: SAGE Publishing 2022-11-01
Series:Journal of International Medical Research
Online Access:https://doi.org/10.1177/03000605221134471
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author Yongmiao Pan
Tingting Wu
Haiyan Shi
author_facet Yongmiao Pan
Tingting Wu
Haiyan Shi
author_sort Yongmiao Pan
collection DOAJ
description Objective Mifepristone has been used to treat endometriosis, but it can cause a constellation of endometrial alterations. Our study investigated the effects of long-term mifepristone on ovarian endometriosis. Methods We retrospectively analyzed the clinicopathological changes of ovarian endometriosis in 11 Chinese patients after long-term low-dose mifepristone therapy and compared these alterations with those observed in eutopic endometrium and adenomyosis side-by-side. Immunohistochemistry was applied to investigate estrogen receptor (ER), progesterone receptor (PR), and Ki67 expression in eutopic and ectopic endometrium. Results Nearly all patients had a pelvic mass and elevated serum CA125 levels. The ovarian lesions were grossly solid, cystic-solid, or cystic. They had a grayish–reddish appearance and a fleshy, honeycomb-like cut surface. The ovarian lesions shared morphological features with the uterine endometrium, and they were characterized by dilated, crowding endometrial glands with non-physiological changes. Immunostaining revealed consistent staining for ER and PR and a low Ki67 index in both eutopic and ectopic endometrium. Conclusions Our findings suggest that ovarian endometriosis can mimic an endometrioid borderline tumor after long-term mifepristone administration. Careful histological assessment and related clinical information are critical for the correct interpretation of these rare entities.
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spelling doaj.art-61a7379b94b44bc09eb3fe358dddd3222022-12-22T03:35:27ZengSAGE PublishingJournal of International Medical Research1473-23002022-11-015010.1177/03000605221134471Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristoneYongmiao PanTingting WuHaiyan ShiObjective Mifepristone has been used to treat endometriosis, but it can cause a constellation of endometrial alterations. Our study investigated the effects of long-term mifepristone on ovarian endometriosis. Methods We retrospectively analyzed the clinicopathological changes of ovarian endometriosis in 11 Chinese patients after long-term low-dose mifepristone therapy and compared these alterations with those observed in eutopic endometrium and adenomyosis side-by-side. Immunohistochemistry was applied to investigate estrogen receptor (ER), progesterone receptor (PR), and Ki67 expression in eutopic and ectopic endometrium. Results Nearly all patients had a pelvic mass and elevated serum CA125 levels. The ovarian lesions were grossly solid, cystic-solid, or cystic. They had a grayish–reddish appearance and a fleshy, honeycomb-like cut surface. The ovarian lesions shared morphological features with the uterine endometrium, and they were characterized by dilated, crowding endometrial glands with non-physiological changes. Immunostaining revealed consistent staining for ER and PR and a low Ki67 index in both eutopic and ectopic endometrium. Conclusions Our findings suggest that ovarian endometriosis can mimic an endometrioid borderline tumor after long-term mifepristone administration. Careful histological assessment and related clinical information are critical for the correct interpretation of these rare entities.https://doi.org/10.1177/03000605221134471
spellingShingle Yongmiao Pan
Tingting Wu
Haiyan Shi
Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone
Journal of International Medical Research
title Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone
title_full Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone
title_fullStr Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone
title_full_unstemmed Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone
title_short Distinct clinicopathological features of ovarian endometriosis after long-term exposure to mifepristone
title_sort distinct clinicopathological features of ovarian endometriosis after long term exposure to mifepristone
url https://doi.org/10.1177/03000605221134471
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AT tingtingwu distinctclinicopathologicalfeaturesofovarianendometriosisafterlongtermexposuretomifepristone
AT haiyanshi distinctclinicopathologicalfeaturesofovarianendometriosisafterlongtermexposuretomifepristone