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  • Title: Pathogenesis of pelvic pain syndrome associated with endometriosis in patients resistant to surgical treatment.
    Author: Radzinsky V, Orazov M, Sharapova O, Khamoshina M.
    Journal: Gynecol Endocrinol; 2020; 36(sup1):12-15. PubMed ID: 33305663.
    Abstract:
    AIM: Endometriosis is one of the most common gynecological diseases diagnosed in almost 70% of patients with chronic pelvic pain (CPP). However, a quarter of women with pelvic pain is diagnosed with external genital endometriosis (EGE) during laparoscopy. A special group is represented by patients with PP that did not stop after the removal of endometrial foci. The mechanisms of the pathogenesis of the formation of pain syndrome are not completely explored yet. According to several authors, a significant role in the pathogenesis of pelvic pain recurrence after surgical treatment of EGE is played by active neuroangiogenesis, both in ectopic and eutopic endometrium. The aim of the study was to expand the understanding of the pathogenesis of pelvic pain that did not stop (recurrence) after surgical treatment of external genital endometriosis. MATERIAL AND METHODS: The study involved 2 stages. At the first stage (algological), data from B&B, NRS and VRS algological questionnaires, which were completed by patients with recurrent PP after surgical treatment of EGE, were analyzed (n = 130, aged 18-45 years old, average age 32.5 ± 7.6 years). All women were operated on for EGE no later than 3-6 months after assessing the patients by the algological questionnaires; they did not receive drug therapy after surgical treatment and sought medical attention for recurrent pelvic pain. Materials for the study of the endometrium were obtained by the pipelle biopsymethod. The control group was formed from a number of women with EGE without PP, who applied for surgical treatment of infertility (n = 30). RESULTS: The results of the study have shown that the basis of pathogenesis of pelvic pain recurrence in patients who did not receive medical therapy after surgical treatment of EGE is the activation of neuro-angiogenesis processes and reduction of apoptosis. The results show a statistically significant 1.6 times increasing expression of NGF in eutopic endometrium (57.9 ± 2.5 vs 35.3 ± 2.1% of patients with the silent form of the gene and its receptor NTRK1 1.8 times (2.78 ± 0.25 versus 1.56 ± 0.21.e. respectively). Conclusion: The pathogenesis of pelvic pain in patients who did not receive medical therapy after surgical treatment of endometriosis compared to no pain form of the disease is the activation of the processes of neurogenesis in the eutopic endometrium.
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