Single-Site Robotic Radical Hysterectomy and Sentinel Lymphnode Biopsy in Cervical Cancer: A Case Report

Histerectomia radical robótica de portal único e biópsia de linfonodo sentinela: relato de caso

ABSTRACT

Robotic surgeries for cervical cancer have several advantages compared with lapa-rotomic or laparoscopic surgeries. Robotic single-site surgery has many advantages compared with the multiport approach, but its safety and feasibility are not established in radical oncologic surgeries. We report a case of a Federation of Gynecology and Obstetrics (FIGO) stage IB1 cervical carcinoma whose radical hysterectomy, sentinel lymph node mapping, and lymph node dissection were entirely performed by robotic single-site approach. The patient recovered very well, and was discharged from the hospital within 24 hours.

Keywords:
Hysterectomy; cervical cancer; single-site robotic laparoscopy; lymphadenectomy; robotics; laparoendoscopic single-site surgery

RESUMO

A cirurgia robótica para carcinoma do colo do útero apresenta vantagens quando comparada com cirurgias laparotômicas ou laparoscópicas. A cirurgia robótica de portal único tem muitas vantagens quando comparada com cirurgias de múltiplos acessos, porém a segurança e a viabilidade deste procedimento ainda não estão estabelecidas para cirurgias oncológicas radicais. Apresentamos um caso de carcinoma de colo do útero, tratado por histerectomia radical, identificação e biópsia de linfonodo sentinela e linfadenectomia pélvica realizada totalmente por cirurgia robótica de acesso único. A paciente recuperou-se bem e recebeu alta no primeiro dia pós-operatório.

Palavras-chave:
Histerectomia; câncer do colo do útero; laparoscopia robótica de sítio único; linfadenectomia; robótica; cirurgia laparoendo-scópica de sítio único

Introduction

Laparoscopic and robotic surgeries for cervical cancer are becoming the standard surgical treatment in most oncologic centers around the world. These procedures have several advantages compared with laparotomic surgeries, including improved quality of life and better surgical outcomes.¹

Most minimally invasive surgeries, laparoscopic or robot-ic, are already being performed by a multiport approach, which is responsible for some risks, such as pain, bleeding, hernia, or infection associated with multiple incisions.²

The concept of laparoendoscopic single-port surgery emerged as a procedure less invasive than multiport lapa-roscopy, and it was recently incorporated by robotic surgery. Robotic single-site surgery has many advantages compared with the multiport approach,^3-6but its safety and feasibility are still being investigated in radical oncologic surgeries.

Case Report

Patient: a 42-year-old, multiparous, two previous C-section patient was diagnosed, by cold-knife cone biopsy, with a Federation of Gynecology and Obstetrics (FIGO) stage IB1 cervical adenosquamous cell carcinoma. The body mass index was 21.3. The physical examination showed no visible residual disease. The magnetic resonance imaging examina-tion showed a cervical tumor of 1.8 cm, without any radio-logic signs of deep invasion or lymph node enlargement. The patient underwent a robotic single-site radical hysterectomy and sentinel lymph node mapping using indocyanine green followed by complete pelvic lymph node dissection.

Surgical technique: The patient under combined anesthe-sia was placed in the semidorsal lithotomy position and then drapped. After bladder catheterization, a speculum was placed for cervical visualization, and 1 mg indocyanine green was injected into the cervix (0.5 mg/ml at 3 and 9 hours; ►Fig. 1) in order for the sentinel lymph node mapping to be detected by SPY fluorescence image (SPY System; Novadaq Technologies, Concord, ON, Canada). Cervical dila-tation was performed, and a Clermont Ferrant uterine ma-nipulator (Karl Storz GmbH & Co. KG, Tuttlingen, Germany) was fixed onto the cervix. The access was performed through the umbilicus, in the midline. A 2.5 cm incision was made using all the umbilical scar length, opening the peritoneal cavity and double-checking the security of this entrance. The single-site port was inserted into the abdominal cavity using an atraumatic forceps, and the arrow drawn on the port was set in the direction of the target organ (uterus and pelvic nodes; ►Fig. 2). The pneumoperitoneum was low flow inflated at a pressure of 15 mmHg. The trendelemburg position was applied, and the bowel was placed with a laparoscopic grasper through the assistant place. The da Vinci(r) Xi System (Intuitive Surgical, Sunnyvale, CA) was docked between the patient's legs. A 3D 8.5 mm endoscope was used in the camera arm, and a monopolar hook and a bipolar Maryland forceps were used on the right and left hands respectively. Adhesiolysis from the epiploon and anterior abdominal wall was performed to improve the vision and surgical field. The near-infrared (NIR) image SPY highlighted in fluorescent green three retroperitoneal nod-ules, two on the right and one on the left. On the right side, one nodule was located in the bifurcation of the external and internal iliac arteries, and the other was medial of the right common iliac artery lateral to the left common iliac vein. On left side we identified three sentinel nodes between internal and external iliac arteries. The three sentinel lymph nodes were collected (►Fig. 3) for pathological ultrastaging. No frozen section was realized. The t-lift(r) device (Vectec, Hau-terive, France) was used for bilateral ovary suspension. The posterior U-cut, a Puntambekar et al⁷ technique, was per-formed to expose both ureters. A bilateral salpingectomy followed for the anterior peritoneum and bladder dissection from the uterus on the caudal direction. The uterine artery was coagulated with a bipolar Maryland forceps close to the internal iliac artery, and the parametrial anterior dissection was performed bilaterally with ureteral tunnelization until the bladder. Hypogastric nerves were identified bilaterally and saved. A Querleu/Morrow type C1 radical hysterectomy was performed. A bilateral pelvic lymph node dissection was performed using only bipolar and monopolar energy from the ForceTriad platform (Covidien; Medtronic, Minneapolis, MN, US). No vessel sealing or ultrasonic energy was used. All surgical specimens were extracted from the abdominal cavity through the vagina, without any bag. A careful hemo-stasis was performed before the vaginal cuff closure. The vaginal cuff closure was started internally, but was aborted due to the absence of the single-site needle driver, and was done vaginally with Caprofyl 2-0 (Caprofyl(r), Ethicon Inc, Bridgewater, NJ, US). The robot was undocked, and the single-site port was taken out. The umbilical incision was sutured in planes with number 2 prolene thread on the aponeurosis, and monocryl 4-0 (Ethicon, Cornelia, Georgia, US) under the skin (►Fig. 4).

Fig. 1
Cervical injection of indocyanine green (1 ml on each side).

Fig. 2
Single-site port. The five-lumen port provides access for two single-site instruments: the 8.5 mm 3DHD endoscope, a 5/10 mm accessory port, and an insufflation adapter.

Fig. 3
Sentinel lymph node mapping with indocyanine green.

Pathological examination: The uterus weighed 85 g and measured 8.8 5.0 3.2 cm. There was bilateral parametrial and vaginal cuff. The gross examination of the specimen revealed an ulcer in the periorificial cervical area (►Fig. 5). The histological examination revealed a histological grade 2 cervical adenosquamous carcinoma measuring 3.0 2.1 1.8 cm associated with multifocal lymphovascular space invasion. The maximum level of infiltration of the cervical wall was 0.7 cm (54% thickness). The parametrial and vaginal cuff as well as the surgical margins were free of neoplasia. There was an intraparametrial lymph node with metastasis. The three sentinel lymph nodes and the pelvic lymph nodes dissected (8 to the left pelvic chain and 9 to the right) were free, totalizing a nodal status of 1/21.

Fig. 4
Umbilicus at the end of the surgery.

Fig. 5
Surgical specimen: uterus and vaginal margins.

Evolution: The patient recovered very well, and was dis-charged from the hospital after 24 hours.

Discussion

Cervical cancer remains highly prevalent worldwide, partic-ularly in lower- and middle-income economies. The standard treatment for early-stage cervical cancer is radical hysterec-tomy, which, although effective, is associated with serious morbidities. A systematic review and meta-analysis was conducted to compare the intraoperative and postoperative complications of robotic radical hysterectomy and other surgical methods. Robotic surgery is superior to abdominal surgery, with lower blood loss, shorter hospital stay, lower febrile morbidity, and lower wound-related complications.⁸ Robotic and laparoscopic surgeries are comparable in the same study. The laparoendoscopic single-site access reduces postoperative pain and analgesia use compared with the multiport conventional laparoscopy in a benign disease.⁹ Although laparoendoscopic radical hysterectomy with pelvic lymphadenectomy appears safe and feasible,¹⁰ it has not gained wide acceptance due to a lack of flexibility inside the cavity. The robotic approach for single-site procedures has the potential advantage of better surgeon comfort.

Robotic laparoendoscopic single-site radical hysterectomy for uterine malignancies is a very recent and innovative surgical procedure, wherein the surgeon operates exclusively through a single skin incision within the umbilicus. This procedure evolved from laparoscopic single-port and multi-port robotic surgery, with many advantages. It is expected to have lesser complications from multiple access and better cosmesis, like single-port laparoscopy, but under more ergo-nomic conditions for the surgeon. The procedure has been reported as feasible and safe in benign conditions, although there are only a few cases reported with this approach for gynecologic cancers.^3,11-14 In a retrospective case-control study comparing robotic single-site to robotic multiport hysterectomy in early-stage endometrial cancer, Corrado et al¹⁴ found similar operative times, lower blood loss, lower hospital stay days, and lower costs with the single-site approach.¹⁴

The single-site approach comes as an upgrade of the minimally invasive surgeries, first of all, because of the cosmetic results. It is unquestionable that one umbilical single incision looks better than two or more surgical wounds, and this is an important factor for cancer patients and their self-esteems. Nevertheless, some technical issues should be considered. Surgeons are obliged to deal with arched instruments that cross through the single-site device reaching the cavity in an inverted position. Assistants hold-ing the camera must keep their arm in between the surgeon's hands, conflicting with the first approach and causing image instability. Inside the cavity, the instruments lack triangula-tion and flexibility. One by one, all of these few details compromise the surgeon's capability, leading to a decrease in performance and an increase in the risks.¹⁵

Robotic surgery improved surgical gestures such as camera stability, less tremors, articulated instruments, and 3D visu-alization. Likewise, single-site robotic surgery developed not only with previous robotic characteristics, like a superior range of motion, but also by canceling the crossing effect of instruments. The software allows the surgeon to control the ipsilateral device as seen on screen. The surgeon's ergonomy is also improved. The doctor remains in a chair, with arms resting on a comfortable support while controlling the instru-ments. The available single site for the da Vinci(r) Xi System with lack of wrist movement represents a downgrade com-pared with the conventional multiport robotic approach. An important detail is that it not only obliges the surgeon to be experienced in classic laparoscopic gestures, but also requires that the whole surgical team be extremely synchronized. A simple suction and irrigation procedure requires a close collaboration between the console surgeon and the bedside assistant.

The latest da Vinci(r) Xi System was upgraded with articulat-ed instruments, and brings some advantages back. Several snake-like robots are currently under development. The flexible architecture and multiple degrees of freedom make this concept the most suitable one for robotic single-site surgeries.¹⁶

In the era of minimally invasive surgeries and significant advances in adjuvant therapies and imaging methods, the role of systematic lymphadenectomies is under debate, and, in many cancers, they have been replaced by less extensive procedures, such as sentinel lymph node biopsy. There are increasing data to suggest that sentinel lymph node mapping for cervical cancer is a sensitive tool in the detection of lymph node metastasis.¹⁷ The traditional techniques of sentinel lymph node mapping use blue dyes (isosulfan or methylene blue) and radiolabeled isotopes such as technetium 99 (Tc99) microsulfur colloid, alone or in combination. These techniques can be challenging to master with prolonged learning curves.¹⁸ A new feasible technique was introduced (using indocyanine green and NIR imaging) to detect the sentinel lymph node fluorescing dye. It has the accumulative benefits of visibility (like from the blue dye) and of the penetration of the signal from the intact tissue (from the nuclear tracer techniques) in a single modality.^17,19 Fluorescence imaging can be used in laparotomic, laparoscopic, and robotic surgeries.^17,19-21

Conclusion

Single-site robotic radical hysterectomy is a feasible proce-dure in early-stage invasive cervical cancer. In our case, indocyanine green mapping allowed us to identify sentinel lymph nodes in both sides, all of them negative, as well as all the pelvic lymph nodes. Although a positive intraparametrial microscopic lymph node was found, it was located in the proximal parametrium, just beside the injection area. All resection margins were free of neoplasia.

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Publication Dates

• Publication in this collection
  Jan 2017

History

• Received
  11 June 2016
• Accepted
  17 Nov 2016