Abstract: Objective：The aim of this study was to evaluate whether retaining myoma pseudocapsule has effect on the healing of uterine wound of hysteroscopic myomectomy for symptomatic type 2 uterine myoma (according to classification for myoma of FIGO, 2011). Methods：From January 2014 to September 2017 in Fuxing hospital, cases of type 2 uterine myoma (single, larger than 2.5 cm) were collected for heaving uterine bleeding and were performed one-step hysteroscopic myomectomy. A total of 70 cases were divided into 2 groups, the myoma pseudocapsule were retained after myomectomy for Group A (35 cases), the myoma pseudocapsule protruding into the uterine cavity were removed for Group B (35 cases). The following medical data were recorded: the age of patients, the size of the myoma, pre-operative treatment by GnRH analogue, operation time, blood loss during the operation, surgical complications. At 1 and 3 months after the operation, second-look hysteroscopy was performed to observe and compare the uterine cavity wounds healing condition of the two groups. Results：There is no significant difference of patients′ age, size of the myoma and the use of pre-operative GnRHa between the two groups; the mean operation time of group A was (33.3±12.3) min (range 17～65 min), the operation time of group B was (32.7±12.1) min (range 18～70 min), there was no significant difference (t=0.195，P=0.846). The mean volume of intra-operative blood loss of group A was (26.4±16.3) mL (10～50 mL), the mean volume of intra-operative blood loss of group B was (26.7±15.8) mL (10～50 mL), there was no statistical difference (t=－0.074，P=0.941); the incidence of intrauterine adhesions after 1 months was 5.71% (2/35) in group A and 20.00% (7/35) in group B, there was no significant difference ( χ2=3.188，P=0.074); the incidence of intrauterine adhesions after 3 months was 0 (0/35) in group A and 11.43% (4/35) in group B, there was significant difference (P=0.039). Conclusions：Myoma pseudocapsule should be protected and retained for hysteroscopic myomectomy surgery. Second-look hysteroscopy is important for prevention intrauterine adhesion after hysteroscopic myomectomy.

Key words: Type 2 uterine myoma, Myoma pseudocapsule, Hysteroscopes, Hysteroscopy