Objective To investigate the efficacy of placing a levonorgestrel-releasing intrauterine system (LNG-IUS) after hysteroscopic transcervical resection of polyps (TCRP) and its impact on the recurrence rate of endometrial polyps (EP) within 12 months postoperatively.
Methods A total of 89 EP patients treated in Nantong Sixth People′s Hospital from December 2020 to December 2022 were selected as the study subjects. Using a prospective study design, the patients were randomly divided into an observation group (n=45, treated with hysteroscopic TCRP followed by LNG-IUS placement) and a control group (n=44, treated with hysteroscopic TCRP without LNG-IUS placement) according to the random number table method. The general clinical data, treatment effects, recurrence rates within 12 months after hysteroscopic TCRP, as well as clinical symptom assessment indicators, uterine hemodynamic parameters, inflammatory cytokine levels, and serum sex hormone levels before hysteroscopic TCRP and 12 months after hysteroscopic TCRP were statistically compared between two groups of EP patients using independent-samples t test and chi-square test. Repeated measures analysis of variance (ANOVA) was used to compare the endometrial thickness and pictorial blood loss assessment chart (PBAC) scores at four time points (before hysteroscopic TCRP and 3, 6, and 12 months after hysteroscopic TCRP) in two groups. This study was approved by the case collection hospital′s Ethics Committee (Approval No. NTLyLy2020042). All subjects signed informed consent forms for the clinical study.
Results ① The total treatment efficacy rate in observation group (97.8%) was higher than that in control group (84.1%), while the recurrence rate within 12 months after hysteroscopic TCRP in observation group (4.4%) was lower than that in control group (18.2%), and the differences were statistically significant (χ2=5.09, 4.21; P=0.024, 0.040). ② Repeated measures ANOVA of endometrial thickness and PBAC scores before hysteroscopic TCRP and at 3, 6, and 12 months after hysteroscopic TCRP in two groups showed interaction effects between different treatment measures and time factors were statistically significont (Ftreatment×time=18.48, 10.14; both with Ptreatment×time<0.001). Analysis of the individual effects of different treatment measures in two groups revealed that the endometrial thickness and PBAC scores at 3, 6, and 12 months after hysteroscopic TCRP in observation group were thinner and lower than those in control group, and the differences were statistically significant (P<0.05). Analysis of the individual effects of time factors in observation group showed that the endometrial thickness at 3, 6, and 12 months after hysteroscopic TCRP was thinner than that before hysteroscopic TCRP, respectively, and the endometrial thickness at 12 months after hysteroscopic TCRP was thicker than that at 6 months, and the differences were statistically significant (P<0.05). The PBAC scores in observation group showed a decreasing trend at 3, 6, and 12 months after hysteroscopic TCRP, and the differences were statistically significant (P<0.05). Analysis of the individual effects of time factors in control group showed that the endometrial thickness showed an increasing trend, while the PBAC scores showed a decreasing trend at 3, 6, and 12 months after hysteroscopic TCRP, and the differences were statistically significant (P<0.05). ③ The visual analog scale (VAS) score for lower abdominal pain, irregular menstruation score, abnormal vaginal discharge score, uterine artery resistance index (RI) and pulsatility index (PI) values, and serum interleukin (IL)-1 and IL-6 levels at 12 months after hysteroscopic TCRP in observation group were all lower than those in control group, while the serum follicle-stimulating hormone (FSH), luteinizing hormone (LH), estradiol, and anti-Müllerian hormone (AMH) levels in observation group were all higher than those in control group, and the differences were statistically significant (P<0.05).
Conclusions Placing an LNG-IUS after hysteroscopic TCRP in EP patients can effectively reduce the recurrence rate of EP, improve clinical symptoms, and does not increase the incidence of adverse reactions.