Sentinel lymphatic mapping among women with early-stage cervical cancer: A systematic review

The presence of pelvic lymph node metastases is without doubt the most significant prognostic factor that determines recurrences and survival of women with early-stage cervical cancer. To avoid the underdiagnosis of lymph node metastasis, pelvic lymphadenectomy procedure is routinely performed with radical hysterectomy procedure. However, the pelvic lymphadenectomy procedure may not be necessary in most of these women due to the relatively low incidence of pelvic lymph node metastasis. The removal of large numbers of pelvic lymph nodes could also render non-metastatic irreversible damages for these women, including vessel, nerve, or ureteral injuries; formation of lymphocysts; and lymphedema. Over the past decades, the concept of sentinel lymph node biopsy has emerged as a popular and widespread surgical technique for the evaluation of the pelvic lymph node status in gynecologic malignancies. The histological status of sentinel lymph node should be representative for all other lymph nodes in the regional drainage area. If metastasis is non-existent in the sentinel lymph node, the likelihood of metastatic spread in the remaining regional lymph nodes is very low. Further lymphadenectomy is therefore not necessary for a patient with negative sentinel lymph nodes. Since the uterine cervix has several lymphatic drainage pathways, it is a challenging task to assess the distribution pattern of sentinel lymph nodes in women with early-stage cervical cancer. This review article will adapt the methodology proposed in these studies to systematically review sentinel lymphatic mapping among women with early-stage cervical cancer.     

The role of sentinel lymph node biopsy in early-stage cervical cancer: A systematic review

Pelvic lymphadenectomy procedure is included as part of the standard protocol of radical hysterectomy for women with early-stage cervical cancer (Stage IA to IB1). However, an important sequel to lymphadenectomy procedure is the possible occurrence of lymphedema in the lower abdomen and lower extremities. Previous researches also find that women with lymphedema experience many emotional impacts, including depression, anxiety, and adjustment problems. Only approximately 10% of women with clinical stage IB cervical carcinoma were involved with metastatic disease. If we could better define the relevant lymphatic nodes that must be removed, it is then possible to limit routinely performed lymphadenectomy for regional nodal metastasis in the pelvis, and hence reduce the need for extended surgical staging (para-aortic lymphadenectomy). We systematically reviewed a body of literature and updated available information concerning the current progress on the application of sentinel lymph node biopsy in women with early-stage cervical cancer. All detection methods (preoperative injection of radiocolloid tracer, intraoperative injection of blue dye, or a combination of both techniques) demonstrated reasonable sensitivity (with a few exceptions), high specificity, low false-negative rate and high negative predictive value. The review of the literature in this paper should convince the readers that sentinel lymph node biopsy has the potential to improve the quality of life and the possibility to maintain relapse-free survival for women with cervical cancer. The proper identification of negative sentinel lymph node allows individualized therapy and may preclude the need of lymphadenectomy procedure in most of these women.     

Sentinel Lymph Node Evaluation in Women with Cervical Cancer

Lymph node status is the most important prognosticator of survival in women with early stage cervical cancer. Thus many patients with cervical cancer will undergo pelvic lymphadenectomy as part of the treatment. This procedure is associated with substantial morbidity. Use of the sentinel lymph node technique in women with cervical cancer has the potential to decrease this morbidity. Multiple studies have suggested that sentinel lymph node mapping in these patients is feasible, with excellent detection rates and sensitivity. This review examines the current body of literature about sentinel lymph node biopsy in women with cervical cancer.     

Intraoperative sentinel node identification in early stage cervical cancer using a combination of radiolabeled albumin injection and isosulfan blue dye injection

OBJECTIVES: We investigated the feasibility of sentinel lymph node identification using radioisotopic lymphatic mapping with technetium-99m-labeled human serum albumin and isosulfan blue dye injection in patients undergoing radical hysterectomy with pelvic lymphadenectomy for treatment of early cervical cancer. METHODS: Between September 2000 and October 2002, 25 patients with cervical cancer FIGO stage I (n=24) or stage II (n=1) underwent sentinel lymph node detection with preoperative lymphoscintigraphy (technetium-99m colloid albumin injection around the tumor) and intraoperative lymphatic mapping with blue dye and a handheld or laparoscopic gamma probe. Complete pelvic or paraaortic lymphadenectomy was performed in all cases by open surgery or laparoscopic surgery. RESULTS: In 23 evaluable patients, a total of 51 sentinel lymph nodes were detected by lymphoscintigraphy (mean 2.21 nodes per patient). Intraoperatively, 61 sentinel lymph nodes were identified, with a mean of 2.52 nodes per patient by gamma probe and a mean of 1.94 nodes per patient after isosulfan blue injection. Forty percent of sentinel nodes were found in the interiliac region and 25% in the external iliac area. Microscopic nodal metastases (four nodes) were confirmed in 12% of cases. All these lymph nodes were previously detected as sentinel lymph nodes. The remaining 419 nodes after pelvic lymphadenectomy were histologically negative. CONCLUSIONS: Sentinel lymph node identification with technetium-99m-labeled nanocolloid combined with blue dye injection is feasible and showed a 100% negative predictive value, and potentially identified women in whom lymph node dissection can be avoided.     

Sentinel node detection in cervical cancer with (99m)Tc-phytate

OBJECTIVES: The aim of this study was to investigate the feasibility of sentinel lymph node (SLN) identification using radioisotopic lymphatic mapping with technetium-99 m-labeled phytate in patients undergoing radical hysterectomy with pelvic lymphadenectomy for treatment of early cervical cancer. METHODS: Between July 2001 and February 2003, 56 patients with cervical cancer FIGO stage I (n = 53) or stage II (n = 3) underwent sentinel lymph node detection with preoperative lymphoscintigraphy ((99m)Tc-labeled phytate injected into the uterine cervix, at 3, 6, 9, and 12 o'clock, at a dose of 55-74 MBq in a volume of 0.8 ml) and intraoperative lymphatic mapping with a handheld gamma probe. Radical hysterectomy was aborted in three cases because parametrial invasion was found intraoperatively and we performed only sentinel node resection. The remaining 53 patients underwent radical hysterectomy with complete pelvic lymphadenectomy. Sentinel nodes were detected using a handheld gamma-probe and removed for pathological assessment during the abdominal radical hysterectomy and pelvic lymphadenectomy. RESULTS: One or more sentinel nodes were detected in 52 out of 56 eligible patients (92.8%). A total of 120 SLNs were detected by lymphoscintigraphy (mean 2.27 nodes per patient) and intraoperatively by gamma probe. Forty-four percent of SLNs were found in the external iliac area, 39% in the obturator region, 8.3% in interiliac region, and 6.7% in the common iliac area. Unilateral sentinel nodes were found in thirty-one patients (59%). The remaining 21 patients (41%) had bilateral sentinel nodes. Microscopic nodal metastases were confirmed in 17 (32%) cases. In 10 of these patients, only SLNs had metastases. The 98 sentinel nodes that were negative on hematoxylin and eosin were submitted to cytokeratin immunohistochemical analysis. Five (5.1%) micrometastases were identified with this technique. The sensitivity of the sentinel node was 82.3% (CI 95% = 56.6-96.2) and the negative predictive value was 92.1% (CI 95% = 78.6-98.3). The accuracy of sentinel node in predicting the lymph node status was 94.2%. CONCLUSION: Preoperative lymphoscintigraphy and intraoperative lymphatic mapping with (99m)Tc-labeled phytate are effective in identifying sentinel nodes in patients undergoing radical hysterectomy and to select women in whom lymph node dissection can be avoided.     

Laparoscopic sentinel lymph nodes identification followed by trachelectomy in early stage cervical cancer

The status of regional lymph nodes is the main prognostic factor in diagnosis and treatment of early stage of the cervical cancer. If the first node that drains a tumor site (sentinel node) is not metastatic, other lymph nodes should also be free of the disease. Detection using blue dye and laparoscopic removal of the sentinel lymph nodes let to avoid radical hysterectomy with pelvic limphadenectomy and it is especially useful in young women who want to preserve fertility. We describe a case of a 33- year old woman with invasive cervical cancer who underwent laparoscopic sentinel lymph nodes detection followed by trachelectomy. Thus histopatological examination confirmed no metastasis in removed sentinel lymph nodes, trachelectomy as a minimally invasive procedure was performed.     

Intraoperative lymphatic mapping in cervix cancer patients undergoing radical hysterectomy: A pilot study

OBJECTIVE: Intraoperative lymphatic mapping and sentinel lymph node identification (SLN) have been increasingly evaluated in the treatment of a variety of solid tumors, particularly breast cancer and melanoma. We sought to evaluate the feasibility of these procedures in patients undergoing radical hysterectomy with pelvic lymphadenectomy for treatment of early cervical cancer. METHODS: Twenty patients with normal-appearing lymph nodes underwent intracervical injection of isosulfan blue dye (lymphazurin 1%) at the time of planned radical hysterectomy and bilateral pelvic/low paraortic lymphadenectomy (40 nodal basins). Regional lymphatic tissue was inspected for dye uptake into lymphatic channels and lymph nodes. Tumor characteristics, surgical findings, and specific locations of lymphatic dye uptake were recorded and correlated with final pathology results. RESULTS: Sentinel lymph nodes were identified in 12 of 20 (60%) patients. A total of 23 sentinel nodes were identified in 17 of 40 (43%) nodal basins dissected (range: 0-2 per basin). Successful SLN identification was less likely in patients with tumors >4 cm compared with those with tumors 相似文献   

Sentinel node detection with radiocolloid lymphatic mapping in early invasive cervical cancer

We assessed the feasibility of sentinel lymph node detection using technicium-99 radiocolloid lymphatic mapping for predicting lymph node metastases in early invasive cervical cancer. Thirty patients with cervical cancer (stages IA2-IIA) underwent preoperative lymphoscintigraphy using technicium-99 intracervical injection and intraoperative lymphatic mapping with a handheld gamma probe. After dissection of the sentinel nodes, the standard procedure of pelvic lymph node dissection and radical hysterectomy was performed as usual. The sentinel node detection rate was 100% (30/30). There were seven (23.3%) cases of microscopic lymph node metastases on pathologic analysis. All of them had sentinel node involvement. Therefore, the sensitivity of sentinel node identification for prediction of lymph node metastases was 100%, and no false negative was found. Preoperative lymphoscintigraphy, coupled with intraoperative lymphatic mapping, located the sentinel nodes accurately in our study patients. This sentinel node detection method appears to be feasible for predicting lymph node metastases.     

Techniken zur Markierung des Sentinellymphknotens beim Mammakarzinom

Lymphatic mapping in breast cancer treatment is important for histopathological tumor classification, evaluation of individual prognosis, and serves for local tumor control. Adjuvant therapeutic decisions should be based on it. Axillary dissection is still the so called “golden standard” in operative breast cancer treatment. But minimal invasive selective lymphadenectomy is an attractive approach to reduce axillary morbidity. The lymphatic flow is visualized by injection of radioactive tracer (Technetium) or dye (Patentblau V). The first lymph node on a direct drainage pathway from the primary tumor is identified as sentinel lymph node. The sentinel lymph node biopsy has to be implemented for early breast cancer treatment under terms of quality assurance and interdisciplinary involvement of nuclear physicians, surgeons, pathologists and radiologists. As a new experimental approach Technetium labeled specific antibodies are used as tracer for immunoscintigraphy. Another new technique uses the magnetic resonance imaging system. These novel approaches for lymphatic mapping needs further evaluation.     

Sentinel lymph node in endometrial cancer: an overview

The role of complete pelvic and para-aortic lymphadenectomy in early endometrial cancer remains controversial in gynecologic oncology. Sentinel lymph node detection is an alternative to assess lymphatic spread in several solid tumors. The authors review the literature related to the detection of sentinel lymph node in endometrial cancer, the techniques employed, and its results and feasibility. The authors review reported case series of endometrial cancer in which the sentinel lymph node biopsy was performed. A systematic literature review was conducted using the PubMed database. Different techniques were used considering lymphatic imaging mapping (colorimetric, isotopic, and fluorescence procedures) and injection site (subserous, hysteroscopic, and cervical). Detection rates of sentinel lymph node were heterogeneous, varying between 44 and 100 % with false-negative rates between 0 and 33 %. Although technically demanding, hysteroscopy approach was associated with the highest detection rate. The largest trials showed a good detection rate with cervical injection, a more reproducible procedure. The laparoscopic route improved the results. Immunohistochemistry staining improved the micrometastasis detection in sentinel lymph node. Cost-effectiveness of systematic lymphadenectomy compared with sentinel lymph node procedure and its value on adjuvant therapies as well as a standardized reproducible and reliable technique must be assessed.     

早期宫颈癌患者保留生育功能的治疗策略研究进展

广泛全子宫切除术和盆腔淋巴结切除术仍然是年轻早期宫颈癌患者治疗的常规术式,患者因此丧失生育能力。本文针对国内外最新研究进展,回顾性分析宫颈癌根治术后宫旁、阴道旁及淋巴结转移情况,发现早期宫颈癌患者中仅27%存在淋巴结转移,并对前哨淋巴结切除术的临床应用前景以及为保留生育功能而进行“最小而有效的”手术治疗方式的研究现状进行总结讨论。前哨淋巴结切除术可提高术中诊断淋巴结转移与否的准确度,减少不必要的过度治疗,目前有替代盆腔淋巴结切除术的趋势。目前保留生育功能的手术主要有6种术式,即扩大宫颈锥切术、单纯宫颈切除术、经阴道广泛性宫颈切除术、开腹广泛性宫颈切除术、腹腔镜下广泛性宫颈切除术和机器人辅助腹腔镜下广泛性宫颈切除术。对于病灶＞2 cm的患者,推荐先行新辅助化疗（NACT）3~4个疗程后,再结合妇科检查及影像学证据,选择宫颈切除范围和具体术式。     

New concepts for staging and therapy of cervix cancer by endoscopic surgery]

Non-invasive staging of cervical cancer according to FIGO is out-dated. In contrast to clinical staging exact histopathologic evaluation of tumor extension and tumor biology can be achieved via laparoscopic evaluation. Invasive endoscopic staging is advantageous and should be integrated into the diagnostic armamentarium of gynecologic oncologists and radiotherapists. Through magnification and blood-less surgery minute anatomical structures can be identified laparoscopically. Thus, fibers of autonomic nerves can be visualized and parasympathetic fibres can be preserved. Conservation of these neural structures leads to significant reduction of postoperative morbidity of bladder and rectum. The concept of the sentinel lymph node is also valid for the uterine cervix. Selected biopsy of the sentinel node and identification of single tumor cells leads potentially to higher oncologic safety and may reduce morbidity associated with radical lymphadenectomy. In early stage cervical cancer fertility may be preserved by radical trachelectomy which is combined with laparoscopic parametric and pelvic lymphadenectomy. Following radical trachelectomy a pregnancy rate of 40% is achieved, the recurrence rate following conventional radical hysterectomy is identical.     

Sentinel node detection with the blue dye technique in early cervical cancer

OBJECTIVE: The aim of this study was to investigate the feasibility of sentinel node detection with the blue dye technique in early cervical cancer. METHODS: In a retrospective study conducted between January 2000 and February 2005, 47 women with early cervical cancer (6 patients FIGO Stage I A, 38 patients FIGO Stage I B, 2 patients FIGO Stage II A, 1 patient FIGO Stage II B) who underwent class II-III radical hysterectomy with pelvic lymphadenectomy were identified. Prior to surgery 1 ml of blue dye (lymphazurin 1%) was injected into the four quadrants of the cervix. RESULTS: The detection rate for sentinel nodes was 83% (39/47 patients). The median number of sentinel lymph nodes per patient was two. Nine patients had positive sentinel nodes. In one patient the sentinel lymph node procedure revealed to be false-negative. Positive predictive value and specificity were both 100%. The sensitivity and negative predictive value were 90% and 97%, respectively. CONCLUSIONS: Sentinel node detection has become a main field of interest in gynecological oncology. Our detection rate and sensitivity rate using the blue dye technique in cervical cancer are comparable to those in previously published data. However, recent data on a combined radioactively labeled albumin and blue dye technique show even more promising results. The clinical validity of the combined techniques must be evaluated prospectively in larger studies.     

Robot-assisted abdominal laparoscopic radical trachelectomy

BACKGROUND: Radical trachelectomy in conjunction with pelvic lymphadenectomy is an established method to preserve fertility in early cases of cervical cancer. The radical trachelectomy is usually performed vaginally despite the initial use of laparoscopy for the lymphadenectomy. The complexity of a laparoscopic abdominal trachelectomy may explain this dual approach. Here we describe the surgical technique of a robot-assisted laparoscopic radical trachelectomy with lymphatic mapping using a radiotracer and without a vaginal approach. CASES AND SURGICAL TECHNIQUE: Two nulliparous women with early cervical cancer underwent a laparoscopic radical trachelectomy and pelvic lymphadenectomy with the assistance of the da Vinci robot (Intuitive Surgical Inc, Sunnyvale, CA). After the sentinel lymph nodes were found negative on frozen section, the parametria, paracolpia and sacrouterine ligaments were dissected sparing the main branches of the uterine arteries. Following ligation of the descending branches of the uterine arteries the cervix and the vagina were transsected using monopolar diathermia and the vagina was sutured to the remaining cervix. Finally, a permanent cerclage was placed. Time for surgery was 387 and 358 min respectively. No perioperative complications were noted and the postoperative period was uneventful in both cases. CONCLUSIONS: Robot-assisted laparoscopic abdominal trachelectomy is a feasible alternative to a combined laparoscopic and vaginal approach.     

Lymph node mapping and sentinel node detection in carcinoma of the cervix, endometrium and vulva

OBJECTIVES: Validity of the sentinel node concept in patients with cervical, endometrial and vulvar cancer. MATERIAL AND METHODS: 47 cases of FIGO stage I and II cervical cancer, 33 cases of first clinical stage of endometrial cancer and 37 patients with FIGO stage I and II of vulvar cancer. In cervical and vulvar cancer preoperative lymphoscyntygraphy and intraoperative lymphatic mapping with blue dye and handheld gamma probe were performed. In patients with endometrial cancer intraoperative lymphatic mapping with blue dye injected into the cervix and into the uterine corpus subserously were done. In the last 10 cases radiolabeled nannocolloid were administered and the patients underwent preoperative lymphoscyntygraphy and intraoperative radio detection of sentinel node. Sentinel nodes were labeled as blue, radioactive, or blue/radioactive. RESULTS: In cervical cancer sensitivity of the dye and radiocolloid methods was 94%, specificity 100% and negative predictive value 97%. Out of 33 cases of endometrial cancer sentinel node was identified in 29 (87.87%) patients. None of women with histological negative sentinel node had metastases in the rest of lymph nodes resected. Sentinel node was detected in all cases of vulvar cancer. The status of sentinel nodes were representative for all lymph node resected. CONCLUSIONS: Concept of sentinel node may be applied first of all for vulvar cancer and also for cervical and endometrial cancer.     

Contribution of the sentinel node procedure to tailoring the radicality of hysterectomy for cervical cancer

OBJECTIVE: The required radicality of hysterectomy for women with early-stage cervical cancer is controversial owing to the risk of severe complications. The aim of this study was to determine the contribution of the sentinel node (SN) procedure to tailoring the radicality of hysterectomy in women with cervical cancer. METHODS: Between April 2001 and December 2005, 54 patients with early-stage or locally advanced cervical cancer underwent laparoscopic sentinel node (SN) biopsy based on combined patent blue and radiocolloid detection. Thirty-nine patients with early-stage cervical cancer underwent a laparoscopic SN procedure with complete pelvic lymphadenectomy and radical hysterectomy. Moreover, 15 women with locally advanced cervical cancer underwent an SN procedure with pelvic and para-aortic lymphadenectomy before concurrent neoadjuvant chemoradiotherapy. RESULTS: The SN detection rate was 83.3%. The detection rate was higher in women with early-stage disease (90%) than in women with more advanced disease (66.6%) (p=0.03). At final histology, 14 metastatic SN were found in 11 (21.3%) of the 54 patients. They comprised macrometastases in 6 SN, micrometastases in 5 SN, and isolated tumour cells in 3 SN. Parametrial involvement with negative sentinel nodes was found in 15.1% of cases. The overall sensitivity, specificity, positive and negative predictive values and accuracy of intraoperative imprint cytology were 20%, 100%, 100%, 79.5% and 80.5%, respectively. Among the 39 women with early cervical cancer, five (12.8%) had parametrial involvement. In univariate analysis, parametrial involvement was significantly associated with large tumour size, advanced-stage disease, positive pelvic lymph nodes and lymphovascular space involvement. Parametrial involvement tended to be associated with positive sentinel nodes. CONCLUSION: These results underline the contribution of the SN procedure to evaluating lymph node status. However, intraoperative imprint cytology appeared poorly accurate, and further histological or biological tools are needed to evaluate SN status and, hence, to tailor the radicality of hysterectomy.     

Sentinel lymph node biopsy in endometrial cancer—Feasibility,safety and lymphatic complications

Objective

To compare the rate of lymphatic complications in women with endometrial cancer undergoing sentinel lymph node biopsy versus a full pelvic and infrarenal paraaortic lymphadenectomy, and to examine the overall feasibility and safety of the former.

Recent trends in the management of invasive vulval cancer

Vulval cancer is a rare gynaecological cancer, predominantly seen in postmenopausal women. It accounts for about 4% of gynaecological malignancies. Most women present with vulval symptoms such as a painful lump, ulcer or itching, although some may be asymptomatic. It should be managed in experienced cancer centres where relevant expertise and experience is available to provide multidisciplinary, individualized care. Wide local excision of the lesion, usually with surgical staging of groin nodes through separate incisions is recommended for early disease. Locally advanced vulval cancers require complex and highly individualized treatment, which may be a combination of radical excision with reconstruction with or without radiotherapy. Sentinel lymph node assessment for staging is now standard of care, replacing en-bloc inguinofemoral lymphadenectomy for surgical staging of smaller, early-stage tumours, and groin dissection is omitted in these women if sentinel node biopsy is negative (GROINSS-V I study). Recent GROINSS-V II study has shown that radiotherapy is a safe alternative in patients with sentinel lymph node micro metastases (≤2 mm) with low groin recurrence rate and lower treatment-related morbidity.     

Sentinel lymph node identification and radical hysterectomy with lymphadenectomy in early stage cervical cancer: laparoscopy versus laparotomy

STUDY OBJECTIVE: To estimate the feasibility and results of sentinel lymph node identification and radical hysterectomy with pelvic lymphadenectomy entirely completed by laparoscopy versus laparotomy in early stage cervical cancer. DESIGN: Retrospective, nonrandomized clinical study (Canadian Task Force classification II-2). SETTING: Acute care, teaching hospital. PATIENTS: From September 2000 through January 2005, 50 consecutive patients with International Federation of Gynecology and Obstetrics stage IA(2), IB(1), and IIA disease less than 4 cm underwent radical hysterectomy and lymphadenectomy with intraoperative sentinel lymph node biopsy. INTERVENTIONS: The operation was performed entirely by laparoscopy in 20 patients and using the conventional abdominal approach in 30. Feasibility of sentinel lymph node identification, surgical morbidity, overall survival, and recurrence rate-free survival in both groups were compared. MEASUREMENTS AND MAIN RESULTS: The overall detection rate of the sentinel lymph node was 100% (false negative 0%). A mean of 2.50 sentinel nodes/patient was detected in the laparotomy group compared with a mean of 2.55 nodes in the laparoscopic group (p = .874). Bifurcation of the right common iliac artery was the most frequent nodal location. Blood loss and length of stay were significantly lower in the laparoscopic group, but surgical time was significantly longer. The median follow-up was 35 months (range 5-57) in the laparotomy group and 22.5 (range 2-52) in the laparoscopic group. Differences in overall survival and disease-free survival were not observed. CONCLUSION: Sentinel lymph node identification and radical hysterectomy in the initial treatment of early stage cervical cancer can be performed safely by laparoscopy with lower morbidity and overall survival and recurrence-free survival similar to standard laparotomy.     

Preoperative pelvic lymphoscintigraphy is of limited usefulness for sentinel lymph node detection in cervical cancer

Objectives

To analyze concordance between preoperative lymphoscintigraphy and intraoperative lymphatic mapping (ILM) for sentinel lymph node identification using technetium 99m-labeled-dextran 500 (99m-Tc) and patent blue dye in patients with early cervical cancer undergoing radical hysterectomy and pelvic lymphadenectomy, as well as to evaluate sentinel lymph node (SLN) detection.

Study design

Forty-seven patients underwent surgical treatment for cervical cancer. For SLN identification, 99m-Tc and blue patent were injected into the cervix on the eve and day of surgery, respectively. Preoperative pelvic lymphoscintigraphy was performed in all patients after 99m-Tc injection. Concordance between preoperative lymphoscintigraphy and ILM was evaluated.

Results

Of the 56 patients who underwent preoperative lymphoscintigraphy, 43 (81.13%) had at least one lymph node identified. Bilateral lymph nodes were identified in 21 (37.5%) patients. Sentinel lymph nodes detected on ILM had been previously found on preoperative lymphoscintigraphy in 66.7%, 67.2% and 0% in the right, left and central locations, respectively. In 14 patients (25%), only one lymph node was identified on preoperative lymphoscintigraphy, but more than one sentinel lymph node was detected on intraoperative mapping. In nine (16.1%) patients, lymphoscintigraphy showed only unilateral lymph nodes, but ILM identified bilateral sentinel lymph nodes.

Conclusion

The combination of patent blue and radionuclide techniques produced excellent results for SLN detection in cervical cancer. Preoperative lymphoscintigraphy does not offer any advantage over ILM for SLN identification.