Ultrastructural Investigation of Pelvic Peritoneum in Patients With Chronic Pelvic Pain and Subtle Endometriosis in Association With Chromoendoscopy

Abolfazl Mehdizadehkashi, Mehdizadehkashi A, Kobra Tahermanesh, Abbas Fazel Anvari‐Yazdi, Abbas Fazel Anvari-Yazdi, Shahla Chaichian, Negar Azarpira, Azarpira N, Maliheh Nobakht, Nobakht M, Abed SM, Seyedeh Mehr Abed, Hashemi N, Neda Hashemi
Journal of minimally invasive gynecology · 2016 · vol. 24(1) , pp. 114–123 · doi:10.1016/j.jmig.2016.09.013 · PMID:27693809 · W2524704767
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This ultrastructural investigation examined pelvic peritoneum in patients with chronic pelvic pain and subtle endometriosis, utilizing chromoendoscopy to observe associated changes.

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Abstract

Study objectiveTo evaluate the pelvic peritoneum under chromoendoscopy by scanning electron microscopy (SEM) as well as light microscopy with hematoxylin and eosin staining and immunohistochemistry (IHC) assays in patients with chronic pelvic pain (CPP) associated with subtle endometriosis.DesignCase series study (Canadian Task Force classification II).SettingA referral academic community tertiary medical center.PatientsThree women aged 29 to 37 years were referred to the obstetrics and gynecology clinic of the tertiary university hospital with CPP. They were suspicious for endometriosis, were not responding to medical treatments, and had undergone previous pelvic laparoscopy to determine the stage of endometriosis and preparation of peritoneal samples under the guidance of staining with methylene blue in 0.25% dilution.InterventionsComparison of stained and unstained pelvic peritoneal samples after the instillation of 0.25% methylene blue into the pelvic cavity.Measurements and main resultsIn 3 patients, laparoscopic examination showed minimal endometriosis. A total of 18 samples (9 stained and 9 unstained) from the 3 patients were prepared for SEM. Ten of the samples (55.6%) showed microstructural peritoneal destruction (7 of 9 stained [77.7%] and 3 of 9 [33.4%] unstained). Eighteen samples (9 stained and 9 unstained) from the 3 patients were also prepared for IHC. Six of these samples (33.3%) were S-100-positive, including 4 of 9 (44.4%) stained samples and 2 of 9 (22.2%) unstained samples.ConclusionsIn general, in the context of CPP and endometriosis, there is no established relationship between the severity of pain and stage of endometriosis. In the pathophysiology of CPP associated with endometriosis, ultrastructural changes can play a significant role. Under methylene blue staining, some destroyed areas were detected, but the stained areas do not necessarily correlate with increased microstructural peritoneal destruction.

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Condition tags

endometriosischronic_pelvic_pain

MeSH descriptors

Adnexal Diseases Endometriosis Laparoscopy Pelvic Pain Peritoneum Staining and Labeling Adnexal Diseases Adnexal Diseases Adnexal Diseases Adult Chronic Disease Chronic Pain Chronic Pain Chronic Pain Chronic Pain Endometriosis Endometriosis Endometriosis Endometriosis Eosine Yellowish-(YS)

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