- Techniques and Instrumentation
- Open Access
Intraoperative transvaginal sonography: a novel approach for localization of deeper myomas during laparoscopic myomectomy
© Springer-Verlag Berlin Heidelberg 2015
Received: 9 September 2014
Accepted: 2 September 2015
Published: 11 September 2015
The aim of this study is to assess the use of intraoperative transvaginal ultrasonography (TVS) to locate deep myomas that were not identified on laparoscopic view. The design of this study is a prospective observational study. This study was conducted in private Advanced Endoscopy and Infertility Treatment Centre, Kerala, India. The study comprised of 84 patients who underwent laparoscopic myomectomy from January 2011 to December 2013 in whom intraoperative TVS was used as an intervention. The number of additional deeper myomas removed was calculated, and recurrence at 1 year was calculated. The total number of myomas enucleated was 390, and the additional myomas enucleated after intraoperative TVS were 94. The recurrence of myomas at 1-year follow-up was 7.1 %. Intraoperative TVS was helpful to the surgeon for identifying deeper myomas making the surgery more effective.
Laparoscopic myomectomy was described for the first time in the late 1970s for subserous myomas . In the early 1990s, the technique was developed to include removal of intramural myomas . As endoscopic surgeons gained experience, they started performing laparoscopic myomectomy for multiple and larger myomas, irrespective of size, number, or location of myoma .
One of the difficulties of laparoscopic myomectomy is locating the deeper and smaller myomas especially those closer to the endometrium (type 3) according to the International Federation of Gynecology and Obstetrics (FIGO) classification . Laparoscopic myomectomy carries increased risk of residual myomas because unlike laparotomy, the uterus cannot be palpated to locate very small myomas. Postoperative recurrence may be either due to enlarged residual myomas or newly formed myomas. There are studies that show increased risk of recurrence (16.7–51.4 %) after 5 years of laparoscopic myomectomy [5, 6]. This increases the chance of reoperation and decreases the chances of symptom relief after the surgery. Several studies have shown that large myomas are associated with significant reduction in pregnancy rate after IVF [7, 8]. Khalaf et al. showed that smaller myomas (≤5 cm) not encroaching endometrial cavity were found to significantly reduce ongoing pregnancy rate at each cycle of IVF by 40 %; similarly, Stovall et al. concluded that implantation and pregnancy rates were one half that of matched controls [9, 10].
Technical problems in identifying deeper myomas lead to misplaced incision causing more blood loss, myometrial integrity, and increased operating time. Good preoperative myoma mapping is helpful, but it is difficult to locate deeper and smaller intramural myomas intraoperatively . Intraoperative location of myomas with laparoscopic contact ultrasound probes can be done . But it is costly and not available as standard ultrasound probes. To overcome this, we attempted to use intraoperative transvaginal ultrasonography (TVS) with a simultaneous laparoscopic view to locate deep-seated and smaller myomas and to enucleate additional residual myomas.
The primary aim of the study was to assess the effectiveness of intraoperative transvaginal ultrasonography to locate deeper and smaller myomas, which were not identified on laparoscopic view.
Material and methods
This was a prospective observational study of women who underwent laparoscopic myomectomy for uterine leiomyomas from January 2011 to December 2013 when intraoperative TVS was done to identify the additional myomas.
Patients with four or more myomas.
Patients with type 3 myoma, irrespective of the number of myomas (myoma that contacts the endometrium and is 100 % intramural) according to the FIGO classification .
Patients with other coexisting diseases like endometriosis and severe pelvic adhesion.
Patients with submucous myomas type 0, 1, and 2 according to FIGO classification.
Laparoscopic myomectomy was not limited by factors such as location (anterior/posterior wall) and depth (subserosal/intramural). Data was collected on demographic characteristics, and the chief indication and symptoms were analyzed. The study was approved by the ethical committee of Paul’s Hospital for the intervention.
Demographic characteristics/chief complaints
33.40 ± 5.13
No. of patients
35 (41.7 %)
22 (26.2 %)
14 (16.6 %)
4 (4.8 %)
5 (5.9 %)
Dysmenorrhea and menorrhagia
2 (2.4 %)
2 (2.4 %)
Total number of myomas
Number of myomas
324 (83.08 %)
20 (5.13 %)
20 (5.13 %)
9 (2.31 %)
9 (2.31 %)
3 (0.77 %)
1 (0.26 %)
1 (0.26 %)
3 (0.77 %)
Mean size = 3.28 cm
The total number of myomas removed was 390. The mean size of the myomas removed was 3.28 cm.
The average blood loss in milliliter was 163.86 ± 18.92 in patients with intraoperative TVS, whereas 148.18 ± 21.44 without intraoperative TVS. The mean drop in hemoglobin concentration after surgery was 1 g%. The total time duration (induction to closure) was 134 ± 27.25 min in cases where intraoperative TVS was performed and 110 ± 21.02 min in cases without intraoperative TVS.
The additional myomas removed after performing intraoperative TVS were 94. These were visible during preoperative TVS also. Size (range) of the additional myomas removed was 2.5 (1.5–3.5 cm). Average number of additional myomas enucleated per patient was 1.1. Out of 94 additional myomas removed, 86 were FIGO type III and 8 were type IV. Recurrence of myoma at 1-year follow-up on ultrasound examination was 7.1 %.
In patients with multiple myomas, an experienced laparoscopic surgeon can remove all visible myomas but identification of deeper and smaller myomas are difficult due to lack of tactile perception. The better way to overcome this limitation is the use of intraoperative ultrasonography. The aim of the study was to assess the effectiveness of intraoperative TVS to locate deeper and smaller myomas that were not identified on laparoscopic view. This is in contrast to a similar study where an intraoperative contact probe was used. However, this method is costly and not easily available . To our knowledge, this is the first study where TVS is used intraoperatively to localize deep/hidden myomas.
In our study, mean size of myomas removed was 3.28 cm, which is not considered significant by Pritts et al. in his review article. Most of our patients were having a long duration of infertility and planning to go for IVF and that was the reason for removing smaller myomas. The size of the myomas removed is similar to other studies [9, 10, 15]. Additional myomas that were not visible laparoscopically were detected by intraoperative TVS in 69 of 84 patients. The mean size of the additional enucleated myomas was 2.5 (1.5 to 3.5 cm). In a similar study where intraoperative contact ultrasound probe was used, 25 additional myomas with a median diameter of 1.2 cm were enucleated in a group of 42 patients which is comparable to our study .
With intraoperative TVS
Without intraoperative TVS
Total time duration (min)
134.63 ± 27.25
110 ± 21.02
Total blood loss (ml)
163.86 ± 18.92
148.18 ± 21.44
Number of additional myomas removed
Causes of postoperative recurrence are considered to be either enlargement of residual myomas or formation of new ones. Postoperative residual myomas greatly affect the recurrence rate. Some studies have reported that laparoscopic myomectomy is associated with a higher recurrence rate as compared with laparotomy recurrence rate [16, 17]. Doriot et al. and Hiroto Shimanuki et al. defined recurrence of a myoma >2 cm with transvaginal ultrasonography to be significant in their study after laparoscopic myomectomy . In a study by Rossetti et al. which compares recurrence of myomas after 6 months in the abdominal and the laparoscopic group, there was a recurrence of 27 % in the laparoscopic group as compared to 23 % in the abdominal group . In our study, recurrence at 1-year follow-up was 7.1 % that is lower than the above studies. In our study, recurrence was due to the formation of new ones as we had removed visible myomas.
The intraoperative ultrasound allowed precise localization of the myoma and determination of the best hysterotomy incision. A suboptimal incision would have caused greater trauma to the normal myometrium, as well as increased operating time for laparoscopic reconstruction of the uterus following the myomectomy. The other option would have been converting to an open procedure to enable palpation of the location of the known myomas and making an appropriate incision. Laparoscopic myomectomy is a well-accepted surgical approach for selected patients . The intraoperative TVS allowed the surgeon to complete the myomectomy laparoscopically without tactile information.
Transvaginal sonography is a widely available imaging modality that every gynecologist is well versed with although there can be an interobserver variation. Its novel use intraoperatively to localize deep-seated myomas enables the surgeon to complete the myomectomy laparoscopically, despite the absence of tactile sensation. Limitation of the study was a lack of randomization and small sample size due to lost to follow-up (Fig. 1) and short follow-up time (1 year).
Intraoperative TVS is helpful to the surgeon for identifying deeper and smaller myomas, thus making the surgery more effective. Hence, intraoperative use of transvaginal sonography for patients with multiple and deep-seated myomas is advantageous.
Conflict of interest
The authors declare that they have no competing interests. The authors alone handle the content and writing of the paper.
All procedures followed were approved by the ethical standards of the responsible committee on human experimentation (institutional and national) and in accordance with the Helsinki Declaration of 1975, as revised in 2000(5). Informed consent was obtained from all patients for being included in the study.
Dr. P.G Paul was the operating surgeon responsible for the planning and conduct of research work. Dr. Dimple K. Ahluwalia and Dr. Dhivya Narasimhan were the assistant surgeons assigned in performing ultrasound during surgeries and conducting studies. Dr. Gaurav Chopade performed statistical analysis and also helped in conducting studies. Dr. Saurabh Patil took charge of the reporting and review of literature. Dr. Varsha Rengaraj and Dr. Tanuka Das were responsible for the preparation of the manuscript.
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