[Abstract] Objective To investigate the importance of negative surgery in gynecologic surgery. Methods By retrospectively analyzing 60 patients with benign ovarian tumors admitted to the PLA General Hospital between 2003 and 2006 (20 cases each of negative, laparoscopic, and open surgery), we compared the operative time, intraoperative bleeding, postoperative morbidity rate, postoperative anal venting time, and hospitalization time of the three types of surgery, and then expanded to the situation and outcome of multiple difficult negative surgeries in our hospital. Results For benign ovarian tumors, the negative group had shorter operative time, faster recovery, and less postoperative morbidity. Conclusion Negative surgery occupies a very important place in gynecological surgery. [Keywords] Ovarian tumor; ovarian cyst; laparoscopy; negative surgery The classical ovarian benign tumor procedure is open or laparoscopic ovarian cyst debulking as the most common, and there is also ultrasound-guided ovarian cyst puncture, while the recently developed negative surgery is more important. We analyzed three surgical procedures in 60 patients with benign ovarian tumors, and also described a variety of difficult negative surgeries in our hospital. 1. clinical data 1.1. general data 60 patients with benign ovarian tumors, aged between 20 and 40 years old, were diagnosed with benign ovarian tumors (22 on the right and 38 on the left) from January 2003 to January 2006 based on preoperative gynecological examination (including double and triple diagnosis), color ultrasound, and tumor markers (CA125). There was no statistically significant difference in age, ovarian cyst size and postoperative pathology was finally confirmed as benign in all three groups. The chance of accidental detection of ovarian malignancy during surgery for adnexal masses was reported to be 0.3%-6%, and the compliance rate between ultrasound diagnosis of ovarian tumors and postoperative pathology was as high as 92%-95%[ 3 ]. The 60 patients underwent open surgery, laparoscopic surgery and negative surgery, 20 patients in each group, with epidural anesthesia. 1.2.1, open surgery The incision can be either transverse (benign) or longitudinal (if malignant is suspected), and the incision can be extended transversely or longitudinally according to the specific condition, which is suitable for all kinds of ovarian tumors (benign or malignant), regardless of the size of the tumor and whether there are pelvic or abdominal adhesions. The abdominal cavity can be explored with fine palpation. 1.2.2 Laparoscopic surgery is a surgical operation performed under CO2 pneumoperitoneum with the surgical field magnified and exposed on a TV screen through a camera and cold light source, and the surgeon directly monitors the screen. This procedure requires skillful open surgery and good lumpectomy instruments, so it is limited in areas where human and material conditions are not mature. 1.2.3, negative surgery ①indications: good uterine mobility on gynecologic examination, good ovarian cyst mobility, diameter less than 10 cm, clear borders, no adhesions (at the time of surgery by experienced gynecologists in our hospital, there can be adhesions in the cyst and the diameter can be greater than 10 cm), ultrasound and tumor marker examination do not suggest malignancy. Contraindications: suspected ovarian malignant tumor or ovarian tumor with serious adhesions, poor general condition (e.g. severe anemia, with heart and lung diseases), vaginitis, obvious deformity or stenosis of the vagina should be listed as contraindications for transvaginal debulking. (③) Surgical method: preoperative iodophor scrubbing of vulva and vagina for 3 times, epidural anesthesia. After routine disinfection, the posterior lip of the cervix was clamped with a cervical forceps, and the uterus was pulled outward. The intrinsic ovarian ligament is pulled down with tissue forceps to expose the intrinsic ovarian ligament and part of the ovarian cyst to the incision, and gauze is placed under the tumor. If the cyst is less than 3 cm in diameter, it can usually be peeled off directly and completely. After aspiration of the intracapsular fluid, cyst debridement was performed, and intraoperative rapid frozen pathology sections were all benign tumors. The excess ovarian tissue was trimmed, and the ovary was hemostatically treated with 3-0 absorbable thread for ovoplasty. After completion, the formed ovary was placed in a normal position in the abdominal cavity. The ligament of the contralateral ovary was retracted in the same way and the contralateral adnexa was examined. The reflexed peritoneum and vaginal mucosa were continuously sutured with 1-0 absorbable thread, and one to two pieces of gauze were removed from the vagina at 24 h. The catheterization was left in place for 24 h. 1.3. Results A comparison of the five indicators of the three surgical procedures is shown in Table 11.3.1 Operative time The shortest operative time was 17 min and the longest was 45 min in the negative group, with mean and standard deviation (26±8) min; the shortest was 30 min and the longest was There was a significant difference between the three groups by test (ANOVA, analysis of variance) (P0.05). 1.3.3, postoperative disease rate One case (5%) occurred in the negative group; one case (5%) in the lumpectomy group; three cases (15%) in the open group; the difference between the negative and lumpectomy groups compared with the open group was statistically significant by χ2 test (P