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Proposal of a modified transcervical endometrial resection (TCER) technique for menorrhagia treatment. Feasibility, efficacy, and patients’ acceptability

Gynecological Surgery volume 11, pages 165–171 (2014)Cite this article

Abstract

The aim of this study is to evaluate the feasibility, efficacy, safeness, and patients’ acceptability of a modified transcervical endometrial resection (TCER) technique for the treatment of menorrhagia. Eighty-four premenopausal women with menorrhagia after careful investigation and 2 months therapy with GnRHa underwent a modified TCER. It was performed with a standard dual channel, 26 French irrigating resectoscope (Karl Storz, GmbH, Germany) after cervix dilatation to 10 mm and sorbitol mannitol solution used as distension medium. The modified technique was based on the resection of the endometrium and of the first myometrial layers only on the anterior and posterior walls, without treating fundus and cornual areas as usually performed. Endometrial resection was performed to a depth of 4 to 5 mm. Clinical and hysteroscopic follow-up was performed for 60 months. Early and late complications, changing in bleeding patterns, and patients’ satisfaction were recorded. Sixty-four out of 73 patients that completed the 60 months improved. Eumenorrhea was achieved in 68.5 %, hypomenorrhea in 5.5 %, and amenorrhea in 13.7 %. Most of the patients (86.3 %) showed satisfaction at the follow-up interview. Control hysteroscopy showed that post modified TCER uterine cavity maintained the possibility of macroscopic and histopathology investigation during follow-up. Modified TCER is a technique easy to perform and effective in the long-term resolution of menorrhagia. In particular, it avoids the formation of synechiae and the shrinkage of the uterine cavity that may be the cause of various long-term complications, such as the delay in the diagnosis of endometrial carcinoma onset.

Introduction

Hysteroscopic transcervical endometrial resection (TCER) is a minimally invasive surgical technique developed in recent years with the purpose of removing the entire thickness of the endometrium lining of the uterus [1]. Indeed, to suppress menstruation successfully, it is essential to remove the full thickness of this lining together with the superficial myometrium, including the deep endometrial basal glands which are believed to be the primary foci for endometrial re-growth [1, 2]. However, TCER is not always completely successful and, in some cases, additional surgical treatment is required, thus limiting the benefits related to the reduced trauma and post-operative complications to the woman. The risk of failure and the expense of multiple treatments opened a debate whether endometrial ablation should replace or not hysterectomy [3], or if it might be an effective therapy for women with hyperplasia, with abnormal uterine bleeding, with high risk for medical therapy or hysterectomy [4]. The emerging clinical opinion is that TCER is an effective and safe alternative to hysterectomy that should be offered to women with menorrhagia for the relief of their heavy menstrual bleeding, together with the caution that there should be the possibility of further surgery, either repeat endometrial ablation or hysterectomy [5].

Matter of discussion related to TCER is also the putative occurrence of other problems related to the endometrial injury, as in the case of immediate (vascular or metabolic type complications (fluid overload) and perforation), or delayed complications (as in the case of the development of partial intrauterine dense adhesions and/or total obliteration of the cavity) [5–12]. Therefore, the ideal method of TCER associating high efficacy to nice tolerability and low incidence of complications is still far from being achieved. In the present study, we evaluated short- and long-term outcomes associated with a new TCER technique to treat menorrhagia that differ from the standard one in the fact that uterine fundus and cornual areas are not removed in the modified technique.

Materials and methods

Subjects

For this prospective cohort study, we consecutively enrolled from October 2, 2000 to September 24, 2005 all women suffering of menorrhagia who referred to our tertiary centers of women health care. The diagnosis of menorrhagia was performed by means of a pictorial blood loss assessment chart, adjusted to our needs in patients describing a history of heavy menstrual blood loss over several consecutive cycles [13]. A scoring system ranging from 1 to 10 was used, with 1 = slightly soiled tampon, 5 = moderately soiled, and 10 = heavily soiled. Sanitary napkins were assigned ascending scores from 1 to 20. A total score more than 100 for each pictorial chart was meant as a confirmed diagnosis of menorrhagia [14]. We considered for the study only patients who had performed a full clinical evaluation including colposcopy and Papanicolaou test, transvaginal ultrasonography, and hysteroscopy with endometrial biopsy [15]. Exclusion criteria were the following: not confirmed diagnosis of menorrhagia, uterine size >12 cm, presence of large organic intrauterine lesions (endometrial polyp >3 cm, submucous myomas G0 > 2 cm or submucous myomas G1 and G2); desire of future pregnancy, cervical and endometrial pre- and malignant conditions or adnexal pathologies; and debilitating medical condition. Any medical hormonal treatment was suspended at least 1 month before enrollment. All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all patients for being included in the study.

Surgical procedure: modified TCER

All the women underwent therapy with GnRH analogs (Leuprolide Acetate 3.75 mg) for 2 months (every 28 days) before surgery, as in standard practice [6]. All procedures were performed under general anesthesia, with induction by propofol 2 mg kg−1 and spontaneous ventilation with a mixture of 60 % nitrous oxide and 40 % oxygen isofluothane, or spinal anesthesia in selected patient [16]. Hysteroscopic MTCER was performed with a standard dual channel, 26 French irrigating resectoscope (Karl Storz, GmbH, Germany) after that cervix was dilated to 10 mm. The uterine cavity was distended with sorbitol mannitol solution used as distension medium, and a suction-irrigating unit (Endomat, Karl Storz, GmbH, Germany) was used to provide positive pressure (120 mmHg) and continuous outflow suction control (0.5 bar). Fluid balance was carefully monitored throughout the procedure that was interrupted if fluid deficit was over 1,000 cm3. Surgical time was recorded starting at resectoscope introduction inside the uterus and ending at its last removal.

Compared to the technique described by Wortman and Dagget [2], our modified TCER began on either anterior or posterior uterine wall and was based on the resection of the anterior cardinal strip of tissue followed by resection of the posterior and the two lateral cardinal strips without treating fundus and cornual areas (Fig. 1). The conventional TCER approach consists in the treatment of fundal and cornual areas by the equatorial loop and/or the use of the rollerball electrode. Endometrial resection was performed to a depth of 4 to 5 mm, and endomyometrial strips were removed from the cavity and sent for histological assessment. The procedure was scheduled for a 1-day surgery.

Fig. 1
figure 1

Resection of the anterior cardinal strip of tissue followed by resection of the posterior and the two lateral cardinal strips without treating fundus and cornual areas

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Office hysteroscopy

Control hysteroscopy was scheduled at 3, 12, 24, and 60 months after the surgery. It was performed by using vaginoscopic approach, with a continuous-flow hysteroscope using Telescope 2.9 mm (HOPKINS II Forward-Oblique Telescope 30°; Karl Storz, Tuttlingen, Germany) [17, 18]. The uterine cavity was distended with temperate saline solution and irrigated using an electronic irrigation pump (Hysteromat, Karl Storz®, Karl Storz, Tuttlingen, Germany). Examination was performed in an office setting, without anesthesia or cervical dilatation.

Main outcomes of the study

Outcome measures referred to changes in bleeding patterns, safeness, and patients’ acceptability. In details, after modified TCER, women underwent office hysteroscopy for uterine cavity evaluation (with endometrial biopsy) 3, 12, 24, and 60 months after TCER, and simultaneously, patients were asked about the amelioration or persistence of bleeding, duration of amenorrhea, improvement of dysmenorrhea, and if they need any hormonal or surgical treatment for heavy bleeding after modified TCER.

Modified TCER was considered successful when it was associated with amenorrhea, hypomenorrhea, and eumenorrhea. A women was defined as amenorrheic when reporting persistent ceasing of menstruation after surgery. Eumenorrhea referred to regular menstrual cycle with average length of 28 days (range, 21–35 days), lasting on average for 4 days (range, 1–8 days) and of normal quantity (flowing less than 80 mL per cycle). Hypomenorrhea referred to menstruations regular in frequency but poor in quantity and/or lasting less than 2 days [1]. Resection was considered non-effective when the patient reported persistence or relapse of menorrhagia.

Interviews were done at the time of every follow-up hysteroscopy, and data were related to patients’ subjective experiences related/consequent to modified TCER and their health status concerning endometrial status.

Statistical analysis

All data were analyzed with Prism software (GraphPad Software Inc., San Diego, CA, USA) and expressed as mean ± SD. The Kolmogorov-Smirnov test was used to evaluate whether values had a Gaussian distribution, in order to choose between parametric and non-parametric statistical tests. Therefore, the unpaired t test was used to compute statistical significance, and χ-square and Fisher exact test to analyze differences between proportions. Statistical significance was assumed for values of P < 0.05.

Results

Some patients were not included in the study. Exclusion criteria were the following: not confirmed diagnosis of menorrhagia (26 women), uterine size >12 cm (10 patients), presence of large organic intrauterine lesions (endometrial polyp >3 cm, submucous myomas G0 > 2 cm, and submucous myomas G1 and G2) (15 patients); desire of future pregnancy (eight patients), cervical, and endometrial pre- and malignant conditions or adnexal pathologies (10 patients).

Eighty-four patients out of 153 (age 45.37 ± 4.02) entered the study. The clinical study protocol consisted of modified TCER, followed by the assessment of endometrial cavity by office diagnostic hysteroscopy 3, 12, 24, and 60 months after the surgery. Table 1 shows clinical and demographic details of the population evaluated in the study. Endometrial resection was successfully performed in all patients enrolled. No one of the patients had early or late complications. In 24 out of 84 patients, endometrial resection was associated with the simultaneous removal of small polyps (n = 15) or myomas (n = 9) (data not shown). In any case, the time required for endometrial resection with associated polypectomy (13.31 ± 6.09 min) or myomectomy (14.7 ± 8.2 min) did not differ when compared to the endometrial resection alone (11.91 ± 4.15 min; P > 0.05), as well as the time spent for cervical dilatation and the infusion volume needed for uterine distension (data not shown). In 11 cases (13 %), adenomyosis was evidenced by histopathologic examination.

Table 1 Anthropometric and surgical data related to the population prospectively evaluated
Full size table

Follow-up outcomes: clinical findings

Eleven women dropped out (13.1 %) and did not complete the first year of follow-up, while 73 (86.9 %) patients completed the follow-up for at least 60 months (Table 2) and 61 (83.6 %) of these reached a 84-month follow-up. During the observational time interval, bleeding patterns were observed in eumenorrhea in 50 out of 73 women (68.5 %), hypomenorrhea in four patients (5.5 %), and amenorrhea in 10 subjects (13.7 %) (Table 2). None of them reported spotting, neither dysmenorrhea onset or worsening, nor medium-/long-term complications such as pregnancy or complications putatively related to the development of intra-cavitary adhesions, such as hematometra and/or cornual hematometra, as observed at diagnostic office hysteroscopy.

Table 2 Data related to the clinical findings retrieved at follow-up after modified TCER in women prospectively evaluated
Full size table

Seven (9.6 %) patients continued to have menorrhagia, and among them, two of the 11 cases were with adenomyosis (18.2 %). Three patients underwent laparoscopic hysterectomy (n = 3) after an average interval of 6 months (range, 1–11 months), two patients underwent hormonal treatment by means of levonorgestrel-based intrauterine device, and the remaining two women underwent 4-month GnRH analog administration (n = 2) (data not shown). In these patients, a second modified TCER was not performed because patients refused such a type of treatment.

In addition, AUB recurred in two women (2.7 %) after 12 and 60 months after endometrial resection (Table 2). They underwent a new modified TCER or laparoscopic hysterectomy (for the women in whom recurrence occurred 60 months after modified TCER) (data not shown).

Follow-up outcome: data from interview

At the end of 3-month follow-up, 63 women (86.3 %) stated they were satisfied by the surgery so much that they would recommend it to women with menorrhagia, whereas the remaining 10 patients (13.7 %) would not, for reasons mainly related to the fear of general anesthesia (n = 8; 80.0 %) or office hysteroscopy in the follow-up (n = 2; 20 %). None of the patients had symptoms or conditions invalidating and/or limiting their quality of life (data not shown).

Follow-up outcome: hysteroscopic findings

Considering findings recorded at hysteroscopic follow-up, none of the patients was found to have intra-uterine adhesions or cavity contracture after 3 months. It was possible to evaluate the entire cavity, including the cornual area and the tubal ostia in all patients (Fig. 2). The same findings were obtained at all time points in the follow-up, even if the uterine cavity at the hysteroscopic evaluation performed after 12, 24, and 60 months from endometrial resection was markedly reduced to a narrow tube as a result of fibrosis and contracture (Fig. 3). In any case, the entire uterine cavity, including the cornual areas, was found to be open and the tubal ostia were visualized at all time points of follow-up. In addition, histological evaluation of endometrial biopsy annually performed failed to found cancerous or pre-cancerous endometrial lesions (data not shown).

Fig. 2
figure 2

Hysteroscopic appearance of endometrial cavity at 3-month follow-up after MTCER. None of the patients were found to have intrauterine adhesions

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Fig. 3
figure 3

A narrowing of the cavity is evidenced at 60 months but it does not hinder to evaluate the entire cavity, including the cornual area

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Discussion

The present study first refers on the clinical efficiency and patients’ perception of a new endometrial resection technique, by using which menorrhagia was resolved in the majority of patients, without surgical complications, no intrauterine adhesions formation in the follow-up, no fluid overload syndrome, short operative time, and a high degree of patients’ satisfaction.

The reasons that led us to devise such a new technique are related to the fact that the conventional hysteroscopic TCER is sometime associated to clinical problems, like surgical (perforation of the uterus), vascular complications or fluid overload syndrome [5–12]. Moreover, like resectoscopic myomectomy, TCER is a surgical procedure suggested only to experienced surgeons [19]. Consequently, our aim was to simplify and to accelerate the procedure maintaining the success rate and possibly decreasing the complications in order to make it accessible even to less experienced gynecologists. In addition, we intended to decrease the occurrence of intrauterine adhesions, contractures, and/or hematometra [12, 20–22]. These last side effects are due to the fact that after the endometrium is destroyed or resected, the myometrium is exposed and intrauterine walls, collapsing on each other, have a natural tendency to grow together. The final result is the intrauterine contracture and marked reduction of the endometrial cavity to a narrow tubular structure as a result of fibrosis that often obstructs the cornual area. This mechanism is responsible for the occurrence of synechiae in 40 % of women submitted to total TCER [2] that may limit the access to the uterine cavity, hematometra, that usually localizes in the fundus of the uterus, or obstruction of the cornual area in 13 % of cases [11, 22, 23]. The persistence in these obstructed areas of islands of endometrial tissue may cause retrograde menstruation or symptomatic cornual hematometra, with an incidence of even 18 %, causing painful distention of the uterus [24]. The potential of all these complications may limit the clinical efficacy of hysteroscopic TCER and can require hysterectomy. In our technique, the resection of the endometrium and of the first myometrial layers was limited only on the anterior and posterior and lateral walls, without treating fundal and cornual areas by using the rollerball, as usually performed [1, 2] The initial hypothesis was that preserving endometrial mucosa of the fundal and cornual areas could decrease the risk of synechiae or focal hematometra facilitating the long-term uterine inspection [15, 25]. The possibility that this approach could result in menorrhagia or bleeding persistence due to the endometrial mucosa not removed was not shown by our study. Moreover, in our case series, we failed to detect intrauterine adhesions at all evaluated time points after 12, 24, and 60 months and it was possible to carry out an endometrial biopsy sampling for histological evaluation despite the presence of some cavity contracture in the long-term follow-up. As possible explanation, one may propose that the integrity of corneal and fundal areas might sustain intrauterine walls.

On this regard, the work of McCausland and McCausland was pioneering, since recommending ablation of only one wall of the uterine cavity and avoiding the cornual areas reduced the incidence of adhesions formation after TCER [26]. Moreover, other authors have already proposed the resection of the entire upper uterine fundus, but sparing the isthmus and the immediate supraisthmic region to prevent hematometra caused by stenosis at the level of the cervical isthmus [27].

Findings obtained in the long-term follow-up of the present study showed the absence of intrauterine adhesions and/or hematometra: no patient reported, both in the hysteroscopic and clinical verification, the appearance or worsening of dysmenorrhea, and none of them had long-term complications ascribable to the development of intrauterine synechiae such as cornual hematometra. These findings lead us to suggest that the modified TCER we are proposing is able to avoid the formation of synechiae or shrinkage of the uterine cavity.

The second clinical matter that merits discussion refers to the absence in our study of intra- and peri-operative complications (uterine perforation, hemorrhage, excess fluid absorption, and thermic damages to peri-uterine structures). Cornual myometrium is indeed notoriously thin and thus with low resistance, therefore representing the critical area for any procedure performed at uterine fundus. Deciding not to treat such zone, we simplified the procedure making uterine perforations or thermic damages to peri-uterine structures improbable or at least less frequent compared to the conventional technique. Nevertheless, in modified TCER, the exposure of a smaller surface of the myometrium and the short operating time needed may together contribute to reduce absorption of hypotonic, electrolyte-free non-conductive distention solution, consequently not allowing the development of the overload syndrome [28].

It could be criticized that the residual endometrial tissue not removed in uterine fundus and cornual areas may be the site of putative pre- or markedly malignant lesions. We took care of this criticism, and so, we submitted our patients to an endometrial surveillance by endometrial biopsy under hysteroscopic guidance. Our follow-up hysteroscopies consented to visualize and collect samples from fundus and corneal areas in every patient. On the contrary, in the conventional TCER technique, the habitual collapse of the uterine walls and the formation of synechiae may hinder endometrial biopsy. Whether such a problem does not seem to affect low-risk population (i.e., patients with pre-ablation biopsy negative for hyperplasia and negative medical history for common risk factors for uterine neoplasia) [29], modified TCER may represent a valid therapeutic option for those patients considered at increased risk of developing hyperplasia and endometrial carcinoma. The unquestionable advantage of TCER, as opposed to new-generation destructive ablation methods, is to provide additional tissue for histological examination of the endometrium so that it is possible to detect any presence of micro foci of neoplasia or a high risk for it in the resected material previously not diagnosed in pre-surgical biopsy [30]. On the other hand, patients with increased risk of hyperplasia or endometrial neoplasia frequently are also at higher risk for major surgery, such is hysterectomy. Indeed, cardiovascular diseases, severe obesity, chronic nephropathies, coagulopathies, and hepatopathies are often co-existent with a history of meno- or metrorrhagia and also imply a high surgical and anesthesiological risks. The modified TCER we propose can be even more suitable for those “complex” patients, since it would have the advantage to be performed more quickly, with less intra- and peri-operative complications that the endometrial resection used so far.

In conclusion, despite the limitation due to the small sample size, our data on complications and the low (11.3 %) prevalence of bleeding persistence after operative hysteroscopy would suggest that modified TCER is a technique easy to perform, effective in the resolution of long-term menorrhagia and useful in patients with high surgical and anesthesiological risks. In addition, this new approach allows avoiding the formation of synechiae and the shrinkage of the uterine cavity that may be the cause for various long-term complications, such as the delay in the diagnosis of endometrial carcinoma onset.

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Informed consent

All procedures followed were in accordance with the ethical standards of the responsible committee on human experimentation (institutional and national) and with the Helsinki Declaration of 1975, as revised in 2000. Informed consent was obtained from all patients for being included in the study.

Conflict of interest

Pietro Litta, Luigi Nappi, Pasquale Florio, Luca Mencaglia, Mario Franchini, and Stefano Angioni declare that they have no conflict of interest.

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Authors and Affiliations

  1. Department of Gynecological Science and Human Reproduction, University of Padua, Padua, Italy

    Pietro Litta

  2. Department of Medical and Surgical Sciences, Institute of Obstetrics and Gynaecology, University of Foggia, Foggia, Italy

    Luigi Nappi

  3. U.O.C. Obstetrics & Gynecology, “San Giuseppe” Hospital, Empoli, Italy

    Pasquale Florio

  4. Section of Gynecology, Centro Oncologico Fiorentino, Sesto Fiorentino, Italy

    Luca Mencaglia

  5. Palagi Freestanding Unit, Florence, Italy

    Mario Franchini

  6. Department of Surgical Sciences, Section of Obstetrics & Gynecology, University of Cagliari, Azienda Ospedaliero Universitaria, Blocco Q, SS554, Monserrato, Cagliari, Italy

    Stefano Angioni

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  1. Pietro Litta
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Correspondence to Stefano Angioni.

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Litta, P., Nappi, L., Florio, P. et al. Proposal of a modified transcervical endometrial resection (TCER) technique for menorrhagia treatment. Feasibility, efficacy, and patients’ acceptability. Gynecol Surg 11, 165–171 (2014). https://doi.org/10.1007/s10397-014-0844-6

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