[Clinical application value of combined focused ultrasound ablation surgery and hysteroscopy in the treatment of solitary type Ⅱ submucosal uterine fibroids with maximum diameter more than 5 cm].

<b>Objective:</b> To explore the effectiveness and application value of focused ultrasound ablation surgery (FUAS) combined with hysteroscopic surgery in treating solitary type Ⅱ submucosal uterine fibroids with maximum diameter >5 cm. <b>Methods:</b> Clinical data of 35 patients with a single type Ⅱ submucosal uterine fibroid with maximum diameter greater than 5 cm who underwent FUAS combined with hysteroscopic surgery at Qingdao Women and Children's Hospital from June 2020 to December 2023 were collected. The clinical characteristics, treatments and treatment outcomes were retrospectively analyzed. <b>Results:</b> (1) Clinical characteristics: the mean age of the 35 patients was (36.7±6.6) years, with a median maximum diameter of fibroids of 56 mm (range: 51-80 mm). All patients presented with symptoms of menorrhagia, median menstrual bleeding score was 5 points (ranged from 3 to 5 points), and 34 cases (97.1%, 34/35) had concomitant anemia, the mean hemoglobin was (83.1±13.8) g/L of 35 patients. (2) Treatments: all 35 patients underwent FUAS treatment initially, with a lesion ablation rate ranging from 69.7% to 97.9% (median:90.7%), and no complications occurred. After FUAS treatment, the volume of fibroids decreased in all patients, with a volume reduction rate ranging from 30.57% to 87.22% (median:76.03%). Hysteroscopic surgery was performed 3-14 months (median: 5 months) after FUAS to remove the necrotic fibroid tissue, achieving a 100.0% (35/35) fibroid resection rate. Only 1 patient developed complications of hyperhyderation syndrome during hysteroscopic surgery, and no complications occurred in the remaining patients. (3) Evaluation of efficacy: after FUAS pretreatment, the maximum diameter of fibroids in the 35 patients decreased significantly (<i>Z</i>=-5.171, <i>P</i><0.001), as did the volume of fibroids (<i>Z</i>=-5.159, <i>P</i><0.001). The hemoglobin level increased significantly compared to the level before FUAS in all cases (<i>t</i>=-8.657, <i>P</i><0.001), and median menstrual bleeding score decreased to 2 points (range: 1-3 points), significantly lower than original level (<i>Z</i>=-5.292, <i>P</i><0.001). At the 3-month follow-up after hysteroscopic surgery, all patients were free of anemia symptoms, with menstrual bleeding scores totally decreased to 1 point, significantly lower than that before hysteroscopic surgery (<i>Z</i>=-4.786, <i>P</i><0.001); hemoglobin level [(118.7±5.6) g/L] significantly increased compared to that before hysteroscopic surgery (<i>t</i>=-9.258, <i>P</i><0.001). All patients underwent gynecological transvaginal ultrasound re-examination, which did not reveal any residual fibroids. <b>Conclusion:</b> FUAS combined with hysteroscopic surgery is effective in treating solitary type Ⅱ submucosal uterine fibroids with maximum diameter >5 cm, providing a new treatment option for patients.