Abdominal radical trachelectomy as fertility-sparing management for early stages of cervical cancer: Our experience in 18 cases.

The aim of this study was to present our experience of 18 cases of abdominal radical trachelectomy (ART), including 5 performed during pregnancy, analyzing patient selection, surgical complications, and oncological and obstetrical outcomes. This reproductive study included all early stage cervical cancer patients referred for ART at the 1st Obstetrics and Gynecology Clinic of the Emergency Clinical County Hospital Targu Mures, between 2010 and 2020. A total of 19 women were considered for ART, and only 1 case required conversion to radical hysterectomy. The patient mean age was 31 years (range 24-38 years), and 66.67% of the patients were nulliparous. Six women (33.33%) had stage IA2, 4 (22.22%) had stage IB1, 5 (27.78%) had stage IB2, and 4 (22.22%) had stage IB3 disease. One intraoperative complication occurred in this series, which consisted in both right ureteral and bladder injuries. Early postoperative complications were represented by urinary bladder dysfunction (33.33%), symptomatic pelvic lymphocele (11.1%), peritonitis (5.5%), and wound infection (5.5%). Late postoperative complications included cervical stenosis (5.5%), amenorrhea (11.1%), and pelvic abscess (5.5%). Four out of the 18 patients were operated on during pregnancy between 14 and 20 weeks; 2 of them gave birth at term, 2 of them aborted shortly after the surgery. Two vaginal recurrences were recorded; both were managed by hysterectomy, partial colpectomy and adjuvant chemoradiotherapy. At this moment, all patients are alive with no evidence of disease and 3 of them managed to conceive. In conclusion, ART should be recommended as a fertility-preserving procedure for women in their reproductive age. In selected cases, ART can be performed during pregnancy with encouraging results. Copyright: © Kiss et al.

Introduction

Cervical cancer has the 4th highest incidence of all cancers among women in the world. In 2018, approximately 570,000 newly diagnosed cases were registered worldwide. In Central and Eastern Europe, the estimated age-standardized incidence rates for women between 20 and 39 years is 16.2 out of 100,000(1). This means that a significant proportion of these women will be diagnosed with cervical cancer in their reproductive years. Classical treatment with radical hysterectomy or irradiation therapy unfortunately leads to infertility. Because of the current trend of delayed childbearing, the loss of fertility has a huge psychosocial impact on these patients (2). This has resulted in the need for the development of fertility-sparing procedures in the treatment of cervical cancer.

Vaginal radical trachelectomy (VRT) with laparoscopic pelvic lymphadenectomy was first described by Dargent in 1994 for the treatment of stage IA2 to IIA cervical cancer (3). This procedure presents acceptable oncological outcomes and the best obstetrics outcomes among fertility preserving methods; yet, it requires extensive skill in vaginal and laparoscopic surgery, more training and a longer learning curve (4). In the 1990's, Ungar and Smith ‘reinvented’ abdominal radical trachelectomy (ART), first described by Aburel in 1956 (5-7). The radicality of the procedure is higher than with the vaginal approach and it is potentially identical to that of the standard type C Querleu-Morrow hysterectomy (8). The obstetrical outcome is slightly worse compared to the vaginal approach, but ART is easier to be learned and it may be used for larger tumors than VRT. That is why it has become the most frequently used radical trachelectomy approach (4). The laparoscopic approach according to recent trials should be avoided because of a higher risk of recurrence and mortality rate and is recommended only for stage IB1 tumors (9).

The aim of this study is to present our experience of 18 cases of ART, including 5 performed during pregnancy, analyzing patient selection, surgical complications, oncological and obstetrical outcomes.

Patients and methods

A retrospective study was conducted at the 1st Obstetrics and Gynecology Clinic of the Emergency Clinical County Hospital Targu Mures including all patients who were eligible for fertility-sparing ART procedure for cervical cancer between 2010 to 2020. The criteria for ART were as follows and as recommended: Histologic diagnosis of invasive cervical cancer (squamous cell carcinoma, adenocarcinoma, or adenosquamous carcinoma), fertile age, a desire for future fertility and no history of infertility, stage IA2 to IB2 (FIGO 2009) disease, and estimated length of the remaining cervix of more than 1 cm (10). Data were collected from the patients' medical records regarding age, pregnancy history, tumor features, surgical comlpications, oncological and obstetrics outcomes.

All patients underwent a thorough preoperative physical examination as well as routine preoperative testing. Histologic diagnosis resulted from a cervical biopsy or conization. A preoperative transvaginal or transrectal ultrasound plus MRI or CT were performed to assess the tumor size, its local invasion and to evaluate the lymph nodes for all of the patients.

The typical ART technique with ligation of uterine arteries (excep for ART performed during pregnancy, when at least one uterine artery is preserved), preservation of ovarian vessels, a bilateral parametrectomy corresponding to type C radical hysterectomy in the classification published by Querleu and Morrow, and a pelvic lymphadenectomy was carried out (8). After midline laparotomy, a pelvic lymphadenectomy was performed up to the deep circumflex iliac vein caudally, and the aortic bifurcation cephalad. If no suspicious lymph nodes were detected, the radical abdominal trachelectomy was initiated by developing the pararectal and paravesical spaces. Bilateral parametrectomy was then performed to the level of the pelvic sidewall. The uterosacral ligament was divided, after the recto-vaginal space was created by blunt dissection, and finally the anterior parametria was resected, after ureterolysis. After the incision of the vagina, the specimen was extracted from the pelvis, and the radical trachelectomy was completed by separating the cervix from the isthmus at approximately 1 cm below the level of the internal os. A discoid histologic specimen harvested from the lower part of the remaining isthmus was sent for frozen section; if the specimen was confirmed to be tumor-positive, a radical hysterectomy was immediately carried out. To re-establish the continuity of the reproductive tract, six to eight interrupted, or a continuous absorbable suture was placed from the vagina to the lower uterus in a circumferential manner. A careful pelvic peritonization was performed at the end of the procedure, with the goal to ensure best anatomical and healing conditions for an eventually spontaneous pregnancy (11). Apart from the ART performed during pregnancy, a permanent cerclage was not considered useful.

Postoperatively, the patients were followed up every 3 months for the first 2 years, then every 6 months for the next 3 years, and annually thereafter; with clinical examination, transvaginal ultrasound, Papanicolaou test and by abdominal CT or MRI annually. All women were advised to postpone a pregnancy for a minimum of 6 months after ART, with at least 2 consecutive normal Papanicolaou smears.

Results

Between 2010 and 2020, a total of 19 cervical cancer patients were referred for ART to our institution. In one patient, ART was converted to radical hysterectomy because of the presence of a tumor-positive lower isthmus specimen upon frozen section.

Thus, ART was completed in 18 patients. The median patient age was 31 (range, 24-38 years); 12 (66%) were nulliparous. The patient characteristics are listed in Table I.

Table I

Patient characteristics of the ART cases (N=18).

Characteristics	Data
Age, years, Median (range)	31 (22-38)
Pregnancy history, n (%)
Nullipara	12 (66.67)
Primipara	4 (22.22)
Multipara	2 (11.11)
FIGO 2018 stage, n (%)
IA2	6 (33.33)
IB1	4 (22.22)
IB2	5 (27.78)
IB3	4 (22.22)
Histology, n (%)
Squamous cell carcinoma, total	15 (83.33)
GR1	1 (5.55)
GR2	8 (44.44)
GR3	6 (33.33)
Adenocarcinoma	2 (11.11)
Glassy cell adenocarcinoma	1 (5.55)
LVSI, n (%)
Yes	10 (55.56)
No	8 (44.44)
Tumor size mm, mean (range)	22.31 (6-49)
Tumor size, n (%)
<2 cm	9(50)
>2 cm	9(50)

ART, abdominal radical trachelectomy; LVSI, lymphovascular space invasion.

Based on the International Federation of Gynecology and Obstetrics clinical staging system (FIGO 2018), 6 (33.33%) were in stage IA2, 4 (22.22%) in stage IB1, 5 (27.78%) in stage IB2, and 4 (22.22%) in stage IB3 disease. Lymphovascular space invasion (LVSI) was described in 10 (55.55%) patients. The median tumor size was 22 mm (range, 6-49 mm). In 9 cases (50%) the tumor was larger than 2 cm. Histologic subtypes included: 15 (83.33%) squamous carcinomas, 2 (11.11%) adenocarcinomas, and 1 (5.55%) glassy cell adenocarcinoma. The mean number of lymph nodes removed during surgery was 38 (range, 13-58).

One intraoperative complication occurred in this series, which consisted in both right ureteral and bladder injuries. Suprapubic cystostomy with bladder suturing and ureteral resection with termino-terminal ureteral anastomosis on double J stent was carried out without any postoperative complication. The postoperative complications are summarized in Table II. In the postoperative period, bladder dysfunction occurred for more than 7 days in 6 out of 18 definitive ART patients (33.3%) which were solved by prolonged catheterization and bladder exercises. Two cases of infected pelvic lymphoceles (11.1%) were drained under ultrasound guidance, and an abdominal wound infection in one case required re-suturing. Two patients had positive pelvic lymph nodes on final pathology results and were sent for chemoradiation, becoming menopausal.

Table II

Surgical, oncological and reproductive outcomes of the ART cases.

Outcomes	Data
No. of lymph nodes retrieved, median (range)	38 (13-58)
Intraoperative complications	1 (bladder and right ureteral injury)
Early postoperative complications, n (%)
Urinary bladder dysfunction	6 (33.3)
Pelvic lymphoceles	2 (11.1)
Pelvic peritonitis	1 (5.5)
Wound infection	1 (5.5)
Late postoperative complications, n (%)
Cervical stenosis	1 (5.5)
Amenorrhea	2 (11.1)
Pelvic abscess	1 (5.5)
Oncological outcomes, n (%)
Recurrences	2 (11.1)
Free of disease	16 (88.8)
Obstetric outcomes
Pregnancies after ART	3/7 trying to conceive (42.8%)

ART, abdominal radical trachelectomy.

Five patients were operated on during pregnancy as shown in Table III. The surgery was carried out between 14 and 20 weeks. In two cases, postoperative recovery was complicated by rupture of the amniotic membranes followed by spontaneous abortion in the first 10 days after surgery, despite tocolytic, antibiotic and progesterone treatment. One of these 2 patients developed general peritonitis on the 11th postoperative day and she was re-operated and drained, but with preservation of the uterus and both adnexae, with complete recovery afterwards. The other two patients later experienced an uneventful pregnancy and reached full term; they both delivered two healthy babies by elective Caesarean section.

Table III

Cases for which ART was performed during pregnancy.

	GA at, surgery weeks	Stage (tumor size in mm)	Histology	Status of the uterine arteries	Duration of surgery	Estimated blood loss	Pregnancy outcome	Neonatal outcome	Oncological outcome
Case 1	16	IB2(37)	Squamous GR3	Left ligated	290 min	500 ml	CS-38 weeks	Good	NED
Case 2	15	IB3(49)	Squamous GR2	Both preserved	320 min	800 ml	AB-9th postop day	-	NED
Case 3	14	IB3(43)	Squamous GR3	Both preserved	350 min	500 ml	AB-12th postop day	-	Adjuvant chemo radiation for positive lymph nodes NED
Case 4	20	IB3(45)	Squamous GR3	Left ligated	310 min	700 ml	CS-39 weeks	Good	NED
Case 5	32	IB3(45)	Squamous GR2	Both ligated	300 min	700 ml	CS-32 weeks prior to ART	Good	NED

ART, abdominal radical trachelectomy; AB, abortion; CS, Cesarean section; GA, gestational age; NED, no evidence of disease.

In one case, the surgery consisted of 2 steps. First, a Caesarean section was performed at 32 weeks of pregnancy, followed immediately by an ART with pelvic lymphadenectomy. The patient was diagnosed with stage IB2 cervical cancer at 24 weeks of pregnancy. She was sent for neoadjuvant chemotherapy, but the medical oncologist denied administering the treatment because of elevated liver enzymes. The patient refused termination of the pregnancy and finally both obstetrical and oncological management was chosen after informed consent.

Most patients did not experience late postoperative complications. One of them (5.5%) had clinically notable cervical stenosis and required cervical dilation. Another two patients became amenorrheic, probably due to insufficient uterine vascularization through the ovarian vessels after ligation of both uterine arteries. Another patient developed a pelvic abscess one year after ART, possibly because of the removal of the cervix, and a left adnexectomy was performed.

To date, 2 patients developed recurrences, both located on the superior part of the vagina. One recurrence occurred after 10 months, and the second 8 years after ART. Hysterectomy and partial colpectomy were performed in both patients, followed by adjuvant chemoradiotherapy. At present, all 18 patients who underwent ART, including the 2 with recurrences, are alive and free of disease.

Regarding the obstetrical outcome, except the two patients with amenorrhea and the two who were menopausal after chemoradiation, 7 out of the remaining 14 women reported a desire to conceive during the follow-up period. Three out of 7 (42.8%) women were successful in conceiving: There were 5 live births at term, all by elective Caesarean section, and no miscarriages or preterm births in our series. Two patients had 2 pregnancies each. Among the total number of ART patients, the pregnancy rate was 16.6%.

Discussion

When considering abdominal radical trachelectomy (ART) as a fertility-sparing procedure aimed to treat an oncological disease, it is important to find an appropriate balance between oncological radicality and obstetrical outcomes. A proper selection of patients, including the above-mentioned clinical imaging techniques can help to optimize postoperative results.

In well selected populations, the recurrence rate and mortality rate can be as low as 3.8 and 0.4%, respectively, according to a systematic review of the literature analyzing 485 patients subjected to fertility-sparing procedures (12).

There is a debate concerning the oncological safety of this procedure in the case of tumors larger than 2 cm. Unfortunately, a considerable proportion of patients have larger tumors at the time of diagnosis. In our series as well, one half of the patients who desired the preservation of fertility had tumors larger than 2 cm. Our data show good oncologic outcomes with low recurrence rates. This finding is also confirmed by a Hungarian study which reports a 5-year disease-free survival of 87.1% for women with tumour size greater than 2 cm treated with ART (13). In addition, in a Chinese retrospective study on 333 ART patients, the recurrence rate for tumors larger than 2 cm was similar to that for smaller tumours <2 cm. But the recurrence rate was lower for squamous cell carcinoma and adenocarcinoma histology compared to adenosquamous cancer (3.9, 2.6 and 18.2%, respectively, P<0.05). Tumor histology was shown to be the only independent recurrence risk factor after multivariate analysis (14).

For stage IB2 (FIGO 2018) cervical cancer (tumor ≥2 cm but <4 cm), two fertility-sparing approaches were studied in a meta-analysis on 338 patients: i) neoadjuvant chemotherapy (NACT) followed by vaginal radical trachelectomy (VRT) plus pelvic lymphadenectomy either before neoadjuvant chemotherapy or at the time of VRT; ii) ART plus pelvic lymphadenectomy. After chemotherapy followed by VRT, 70% of the women who tried to conceive became pregnant. The recurrence rate was 10% and mortality 2.9%. After ART, 21% of women who have tried to conceive became pregnant. Recurrence rate was 6.9%, and overall mortality 3.4%. In conclusion, VRT preceded by neoadjuvant chemotherapy exhibited better obstetrical outcomes compared to ART, with similar oncological results (15).

In non-pregnant women, cerclage was avoided at the end of ART, despite the recommendations of other authors (16). As described by Aburel, the scar tissue developed on the remaining cervix-istmus after ART would be strong enough to prevent an abortion (5). This may be the explanation for the low incidence of cervical stenosis in our study (5.5%), compared with other studies (9.5-12%) (12,17). By contrast, a prophylactic cerclage was performed in all ART during pregnancy.

Our pregnancy rate (16.6%) was similar to that described by Okugawa et al-18% for patients with tumor dimension <2 cm and 8.1% for larger tumors and Pareja et al-16.2% (12,18). All of our ART patients delivered at term, despite avoiding the cerclage during ART. The premature delivery rate may be as high as 60% in other studies because of the shortened cervix (12,17,19). After VRT, a significantly higher rate of pregnancy is observed compared with ART, 57 vs. 44%, but without any difference in the live birth rate (19).

The occurrence of late complications after ART can significantly alter the quality of life. A recent study highlighted overall low baseline and follow-up scores on the Female Sexual Functioning Index suggesting overall sexual dysfunction. Quality of life, sexual, and functional assessments declined immediately postoperatively; however, most returned to baseline measures by 6 months postoperatively (20).

Recognizing patients with a high risk for developing complications is of great importance. Li et al observed a correlation between the abdominal scar characteristics using the Vancouver Scar Scale (VSS) and the risk of developing cervical stenosis. They suggest the placement of a tailed IUD at the time of surgery, and keeping it in place until the patient wishes to conceive for all the patients with VSS score >7(21).

A challenge for performing ART is the preservation of one or both uterine arteries to ensure a sufficient blood supply to the uterus (22). Initial description of the procedure involved the ligation of both uterine arteries (5). This approach raises concerns regarding possible uterine atrophy and/or amenorrhea and consecutively to a negative impact on fertility (cervical stenosis) and obstetric outcomes (prematurity, low birth weight). Reports concerning the preservation of uterine vessels are scarce, excepting for ART performed during pregnancy, when the uterine artery size is larger (23,24). The main concern regarding the oncologic radicality is related to the ability to perform an identical type C parametrectomy without the ligation of the uterine vessels, which technically is more difficult.

Out of our 18 ART cases, 5 patients were operated on during pregnancy, between 2015 and September 2019. ART was performed in the second trimester in 4 out of the 5 patients, out of which 2 patients aborted during the first 10 days after the procedure due to premature rupture of membranes, and the other 2 had a no-eventful pregnancy and delivered by elective C-section at term (Table III). The fifth ART case was performed at 32 weeks of pregnancy and consisted of two steps: First, an elective C-section, followed by ART. All the five patients are free of disease at this moment, but one of them, after abortion, was sent for chemoradiation for positive lymph nodes on final pathology report. However, ART might be considered for appropriately selected patients with early-stage cervical cancer having a strong desire to preserve their pregnancy and who are not willing to expose the fetus to the risks that may arise due to neoadjuvant chemotherapy (25). The early second trimester of pregnancy appears to be the most suitable period during which to carry out this procedure (26).

Performing ART is not a guarantee for a successful upcoming pregnancy; on the contrary, it can lead to pregnancy complications. Preoperative counseling regarding unfavorable obstetrical outcome is very important and can also help to set realistic expectations regarding pregnancy. In order to correctly identify the cause of infertility after ART, a preoperative assessment of the reproductive capability (ovarian reserve, ovulatory dysfunction or tubal factor) is recommended by a reproductive specialist (27). ART is a demanding technique; thus, it is advisable for this procedure to be performed only at oncologic departments with high expertise in cervical cancer surgery, that are extremely familiar in performing radical hysterectomies (28).

In conclusion, abdominal radical trachelectomy should be recommended as a fertility-preserving procedure for women in their reproductive age. A proper selection of patients and the suitable radical trachelectomy approach (abdominal, vaginal or laparoscopic) can help to optimize postoperative results (29). An optimal balance between the extent of surgical therapy and the patient's desire to maintain their fertility should be targeted. Shared decision making and detailed informed consent are essential.