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Wang X, Nie L, Zhu Q, Zuo Z, Liu G, Sun Q, Zhai J, Li J. Artificial intelligence assisted ultrasound for the non-invasive prediction of axillary lymph node metastasis in breast cancer. BMC Cancer 2024; 24:910. [PMID: 39075447 PMCID: PMC11285453 DOI: 10.1186/s12885-024-12619-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Accepted: 07/09/2024] [Indexed: 07/31/2024] Open
Abstract
PURPOSE A practical noninvasive method is needed to identify lymph node (LN) status in breast cancer patients diagnosed with a suspicious axillary lymph node (ALN) at ultrasound but a negative clinical physical examination. To predict ALN metastasis effectively and noninvasively, we developed an artificial intelligence-assisted ultrasound system and validated it in a retrospective study. METHODS A total of 266 patients treated with sentinel LN biopsy and ALN dissection at Peking Union Medical College & Hospital(PUMCH) between the year 2017 and 2019 were assigned to training, validation and test sets (8:1:1). A deep learning model architecture named DeepLabV3 + was used together with ResNet-101 as the backbone network to create an ultrasound image segmentation diagnosis model. Subsequently, the segmented images are classified by a Convolutional Neural Network to predict ALN metastasis. RESULTS The area under the receiver operating characteristic curve of the model for identifying metastasis was 0.799 (95% CI: 0.514-1.000), with good end-to-end classification accuracy of 0.889 (95% CI: 0.741-1.000). Moreover, the specificity and positive predictive value of this model was 100%, providing high accuracy for clinical diagnosis. CONCLUSION This model can be a direct and reliable tool for the evaluation of individual LN status. Our study focuses on predicting ALN metastasis by radiomic analysis, which can be used to guide further treatment planning in breast cancer.
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Affiliation(s)
- Xuefei Wang
- Breast Surgery Department, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College and Hospital, No. 3 Dongdan, Dongcheng District, Beijing, China
| | - Lunyiu Nie
- Department of Computer Science and Technology, Tsinghua University, Beijing, China
| | - Qingli Zhu
- Ultrasonography Department, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College and Hospital, No. 3 Dongdan, Dongcheng District, Beijing, China
| | - Zhichao Zuo
- Radiology Department, Xiangtan Central Hospital, Hunan, China
| | - Guanmo Liu
- Breast Surgery Department, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College and Hospital, No. 3 Dongdan, Dongcheng District, Beijing, China
| | - Qiang Sun
- Breast Surgery Department, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College and Hospital, No. 3 Dongdan, Dongcheng District, Beijing, China.
| | - Jidong Zhai
- Department of Computer Science and Technology, Tsinghua University, Beijing, China.
| | - Jianchu Li
- Ultrasonography Department, Chinese Academy of Medical Sciences and Peking Union Medical College, Peking Union Medical College and Hospital, No. 3 Dongdan, Dongcheng District, Beijing, China.
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Ha SW, Lee HJ, Cho AS, Hwang SI, Lee HJ. Evaluation of lymph node metastasis in a rabbit tumor model: correlations between contrast-enhanced ultrasound and pathologic findings. Ultrasonography 2019; 39:60-69. [PMID: 31786903 PMCID: PMC6920616 DOI: 10.14366/usg.19010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 06/10/2019] [Indexed: 12/14/2022] Open
Abstract
Purpose The purpose of this study was to evaluate the ability of contrast-enhanced ultrasonography (CEUS) with microbubbles to detect metastatic lymph nodes (LNs) for treatment planning and prognosis. Methods For the metastatic LN model, ground VX2 tumor tissues were injected subcutaneously in 12 rabbits, just below the right hind limb. The rabbits were classified into three groups based on the LN area: group A (n=4, >1.9 cm2 ), group B (n=4, 1-1.9 cm2 ), and group C (n=4, <1 cm2 ). The LNs were monitored on CEUS for 10 seconds after injecting 2.5 mL of microbubbles. The percent area of metastatic LNs was calculated on pathologic images and compared with CEUS images. Results In group A, the mean percent area of metastasis was 40.7%±19.4%. In all cases of metastasis, round-shaped perfusion defects were clearly observed in CEUS images. The metastatic areas were strongly correlated with pathologic findings. The mean percent area in group B was 21.5%±14.4%. The CEUS findings showed multiple nodular perfusion defects, clearly revealing the metastatic areas. In group B, the CEUS and pathologic findings were concordant for three of the four cases. The mean percent area in group C was 9.1%±6.4%. However, in this group, CEUS only detected a small perfusion defect in one case. Conclusion CEUS has the potential to depict characteristic imaging features of metastatic LNs but still has limitations in early detection.
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Affiliation(s)
- Shin-Woo Ha
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.,Research Institute, IMGT Co., Ltd., Seongnam, Korea
| | - Hyun-Je Lee
- Department of Nanoconvergence, Seoul National University Graduate School of Convergence Science and Technology, Suwon, Korea
| | - Ae-Sin Cho
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Sung Il Hwang
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea
| | - Hak Jong Lee
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, Seongnam, Korea.,Research Institute, IMGT Co., Ltd., Seongnam, Korea.,Department of Nanoconvergence, Seoul National University Graduate School of Convergence Science and Technology, Suwon, Korea
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Karanlik H, Igci A. Surgical Approach in Invasive Breast Cancer. Breast Cancer 2019. [DOI: 10.1007/978-3-319-96947-3_13] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Sentinel Lymph Node Biopsy in Breast Cancer Patients by Means of Indocyanine Green Using the Karl Storz VITOM® Fluorescence Camera. BIOMED RESEARCH INTERNATIONAL 2018; 2018:6251468. [PMID: 29780827 PMCID: PMC5892256 DOI: 10.1155/2018/6251468] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2017] [Revised: 02/12/2018] [Accepted: 02/20/2018] [Indexed: 12/15/2022]
Abstract
Currently, the use of radioisotope and blue dye for sentinel lymph node biopsy (SLNB) for axillary staging in breast cancer is common. Recently, indocyanine green (ICG) has been proposed as an alternative sentinel lymph node (SLN) tracking agent. We evaluated the clinical value of ICG as an additional tracer in combination with Technetium99m and as an alternative to Technetium99m for the identification of SLN in 104 breast cancer patients. 21 patients had at least 1 histologically tumor-positive SLN. All 21 patients were detected by ICG; in one of these 21 sentinel-positive patients, Technetium99m was unable to identify lymph node involvement. Our results show that ICG is as effective as the radioisotope for SLNB. In addition, as a near-infrared dye, it has the advantages of real-time visualization, lower cost, and wider availability, since no radioactive material needs to be handled. This trial is registered with German Clinical Trial Register Main ID: DRKS00013606.
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Guo W, Zhang L, Ji J, Gao W, Liu J, Tong M. Evaluation of the benefit of using blue dye in addition to indocyanine green fluorescence for sentinel lymph node biopsy in patients with breast cancer. World J Surg Oncol 2014; 12:290. [PMID: 25239029 PMCID: PMC4182872 DOI: 10.1186/1477-7819-12-290] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2014] [Accepted: 09/08/2014] [Indexed: 11/25/2022] Open
Abstract
Background Near infrared-guided indocyanine green (ICG) fluorescence has vast potential for guiding sentinel lymph node biopsy (SLNB) in patients with breast cancer. The purpose of this study was to evaluate any additional clinical benefit for SLNB when blue dye is used in combination with ICG. Methods Between November of 2009 and September of 2013, 86 patients diagnosed with breast cancer were investigated by SLNB using a combination of patent blue and ICG. A lymph node was considered as the sentinel lymph node (SLN) when it was stained with blue dye and/or fluorescence. A levelIandIIaxillary dissection was performed for verification of axillary node status after the SLNB. Results The SLN identification rate of SLN for ICG-patent blue combination was comparable to that for ICG alone (98.8% versus 93%; P = 0.054), but the false-negative rate was reduced from 12% (3/25) to 4% (1/25). Twenty-four patients had positive SLNs. In two of those patients, although there were SLNs identified by both tracers, the positive SLNs were identified by blue dye only. Conclusion Although blue dye did not improve the identification rate significantly, there was a definite benefit in improving the false-negative rate. The use of a fluorescence method together with blue dye is an ideal method for hospitals that do not have access to conventional radiation-based detection methods.
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Affiliation(s)
- Wenbin Guo
- The Breast Centre, Department of Surgery, Dalian Central Hospital, Dalian Medical University, 826, Xinan Road, Shahekou District, Dalian 116033, China.
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Tong M, Guo W, Gao W. Use of Fluorescence Imaging in Combination with Patent Blue Dye versus Patent Blue Dye Alone in Sentinel Lymph Node Biopsy in Breast Cancer. J Breast Cancer 2014; 17:250-5. [PMID: 25320623 PMCID: PMC4197355 DOI: 10.4048/jbc.2014.17.3.250] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Accepted: 07/11/2014] [Indexed: 11/30/2022] Open
Abstract
PURPOSE Near-infrared fluorescence imaging with indocyanine green (ICG) has the potential to improve sentinel lymph node (SLN) mapping in breast cancer. In this clinical trial, we compared the potential value of ICG combined with blue dye with that of blue dye alone for detecting SLNs. METHODS Patients undergoing SLN biopsy (SLNB) between November 2010 and November 2013 were included. Up to December 2011, SLNs were detected by using patent blue (PB) alone, and since January 2012, by using PB in combination with ICG. The patients were divided into the following two groups: group A (ICG-PB; n=96) and group B (PB; n=73), and SLN detection parameters were compared between the groups. All patients underwent level I and II axillary dissections after SLNB. RESULTS In group A, the SLN detection rate was 96.9% (93/96), the accuracy of detection was 98.9% (92/93), and the false-negative rate (FNR) was 3.4% (1/29). In group B, the SLN detection rate was 84.9% (62/73), the accuracy of detection was 96.8% (60/62), and the FNR was 11.1% (2/18). The ICG-PB group showed significantly superior results compared to the PB group for SLN detection (p=0.005) and a greatly improved FNR. CONCLUSION The combined fluorescence and blue dye-based tracer technique was superior to the use of blue dye alone for identifying SLNs, and for predicting axillary lymph node status in patients with breast cancer; in addition, the combined technique had reduced false-negative results.
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Affiliation(s)
- Meng Tong
- Department of Surgery, Breast Center, Dalian Central Hospital of Dalian Medical University, Dalian, China
| | - Wenbin Guo
- Department of Surgery, Breast Center, Dalian Central Hospital of Dalian Medical University, Dalian, China
| | - Wei Gao
- Department of Surgery, Breast Center, Dalian Central Hospital of Dalian Medical University, Dalian, China
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Lee YJ, Kim YH, Lee KH, Park JH, Lee HS, Jung SC, Joo SM. Sentinel node mapping of VX2 carcinoma in rabbit thigh with CT lymphography using ethiodized oil. Korean J Radiol 2014; 15:29-36. [PMID: 24497789 PMCID: PMC3909858 DOI: 10.3348/kjr.2014.15.1.29] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2013] [Accepted: 11/13/2013] [Indexed: 02/05/2023] Open
Abstract
OBJECTIVE To assess the feasibility of computed tomography (CT) lymphography using ethiodized oil for sentinel node mapping in experimentally induced VX2 carcinoma in the rabbit thigh. MATERIALS AND METHODS This experiment received approval from the institutional animal use and care administrative advisory committee. Twenty-three rabbits with VX2 carcinoma in the thigh underwent CT before and after (1 hour, 2 hour) peritumoral injection of 2 mL ethiodized oil. After the CT examination, sentinel nodes were identified by peritumoral injection of methylene blue and subsequently removed. The retrieved sentinel and non-sentinel lymph nodes were investigated with radiographic and pathologic examinations. Based on the comparison of CT findings with those of radiographic and pathologic examinations, the diagnostic performance of CT for sentinel node identification was assessed. RESULTS All 23 rabbits showed 53 ethiodized oil retention nodes on post-injection CT and specimen radiography, and 52 methylene blue-stained nodes at the right femoroiliac area. Of the 52 blue-stained sentinel nodes, 50 nodes demonstrated ethiodized oil retention. Thus, the sentinel node detection rate of CT was 96% (50 of 52). On pathologic examination, 28 sentinel nodes in 17 rabbits (nodes/rabbit, mean ± standard deviation, 1.7 ± 0.6) harbored metastasis. Twenty seven of the 28 metastatic sentinel nodes were found to have ethiodized oil retention. CONCLUSION Computed tomography lymphography using ethiodized oil may be feasible for sentinel node mapping in experimentally induced VX2 carcinoma in the rabbit thigh.
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Affiliation(s)
- Yoon Jin Lee
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea
| | - Young Hoon Kim
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea
| | - Kyoung Ho Lee
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea
| | - Ji Hoon Park
- Department of Radiology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea
| | - Hye Seung Lee
- Department of Pathology, Seoul National University Bundang Hospital, Seongnam 463-707, Korea
| | - Seung Chai Jung
- Department of Radiology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul 110-744, Korea
| | - Seung-Moon Joo
- Department of Radiology, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 135-720, Korea
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Guo W, Zhang L, Ji J, Gao W, Liu J, Tong M. Breast cancer sentinel lymph node mapping using near-infrared guided indocyanine green in comparison with blue dye. Tumour Biol 2013; 35:3073-8. [PMID: 24307620 DOI: 10.1007/s13277-013-1399-2] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2013] [Accepted: 11/05/2013] [Indexed: 01/31/2023] Open
Abstract
Near-infrared (NIR) fluorescence imaging using indocyanine green (ICG) was considered to have the potential to improve sentinel lymph node (SLN) mapping in breast cancer. Herein, we performed a randomized clinical trial to evaluate the effectiveness of ICG fluorescence imaging compared with blue dye imaging in SLN navigation surgery. We also analyzed lymph drainage pathways to identify targets for sentinel lymph node biopsy (SLNB). Finally, 68 consecutive patients diagnosed with breast cancer and who underwent SLNB between November 2010 and September 2012 were enrolled in the study. The cases were randomly grouped into either the ICG fluorescence or blue dye group, with 36 in the ICG fluorescence group and 32 in the blue dye group. Levels I and II axillary dissection was performed in all cases after SLNB. A single lymph drainage pathway was detected in 21 of 36 (58.3%) patients, and multiple lymph drainage pathways were detected in 15 of 36 (41.7%) cases. The detection rate of SLNB was higher by ICG fluorescence than by blue dye (97.2 vs. 81.3%, p < 0.05), as 3.6 SLNs were detected on average in the ICG fluorescence group compared to 2.1 in the blue dye group. However, the sensitivity and false-negative rate were similar in the two groups. In conclusion, ICG fluorescence was superior to blue dye for the identification of the SLN.
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Affiliation(s)
- Wenbin Guo
- Department of Surgery, Breast Center, Dalian Central Hospital, Dalian Medical University, No. 826, Xinan Road, Shahekou District, Dalian, 116033, China,
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Kim YH, Lee YJ, Park JH, Lee KH, Lee HS, Park YS, Park DJ, Kim HH. Early gastric cancer: feasibility of CT lymphography with ethiodized oil for sentinel node mapping. Radiology 2013; 267:414-21. [PMID: 23382288 DOI: 10.1148/radiol.12121527] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
PURPOSE To evaluate the feasibility of CT lymphography with ethiodized oil for sentinel node mapping in porcine stomachs and in patients with early gastric cancer. MATERIALS AND METHODS Approval for the animal study was obtained from the authors' institutional animal use and care administrative advisory committee, the clinical study was approved by the institutional review board, and informed consent was obtained from each participant. Five pigs underwent CT lymphography 1 hour after gastric subserosal injection of 1 mL ethiodized oil and sentinel node mapping with injection of 1 mL methylene blue. Ethiodized oil retention nodes were identified on the radiographic images of the gastric specimen and removed for histopathologic examination. In addition, 10 patients with early gastric cancer underwent CT lymphography with peritumoral injection of 1 mL ethiodized oil, followed by sentinel basin extirpation with CT and routine nodal dissection. The removed sentinel basins were examined by radiography. Histopathologic examination was performed for dissected nodes, including sentinel nodes. RESULTS In each of the five pigs, CT showed one perigastric ethiodized oil retention node. After harvesting the ethiodized oil retention node, blue-stained areas were identified in the five removed nodes and intranodal ethiodized oil was detected on histopathologic examination. In all 10 patients, CT lymphography with ethiodized oil successfully defined the sentinel basin with ethiodized oil retention nodes. CT lymphography revealed 20 ethiodized oil retention nodes. After basin extirpation, 28 and 46 nodes were detected on radiographic and histopathologic examinations. Histopathologic examination revealed that one patient had micrometastases at two sentinel nodes and another patient had isolated tumor cells at one sentinel node. No patient had metastasis in nonsentinel nodes. CONCLUSION CT lymphography with ethiodized oil may be a feasible method for sentinel node mapping in patients with early gastric cancer.
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Affiliation(s)
- Young Hoon Kim
- Department of Radiology, Seoul National University Bundang Hospital, Seoul National University College of Medicine, 300 Gumi-dong, Bundang-gu, Seongnam-si, Gyeonggi-do 463-707, Korea
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Pesek S, Ashikaga T, Krag LE, Krag D. The false-negative rate of sentinel node biopsy in patients with breast cancer: a meta-analysis. World J Surg 2012; 36:2239-51. [PMID: 22569745 DOI: 10.1007/s00268-012-1623-z] [Citation(s) in RCA: 122] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
BACKGROUND In sentinel node surgery for breast cancer, procedural accuracy is assessed by calculating the false-negative rate. It is important to measure this since there are potential adverse outcomes from missing node metastases. We performed a meta-analysis of published data to assess which method has achieved the lowest false-negative rate. METHODS We found 3,588 articles concerning sentinel nodes and breast cancer published from 1993 through mid-2011; 183 articles met our inclusion criteria. The studies described in these 183 articles included a total of 9,306 patients. We grouped the studies by injection material and injection location. The false-negative rates were analyzed according to these groupings and also by the year in which the articles were published. RESULTS There was significant variation related to injection material. The use of blue dye alone was associated with the highest false-negative rate. Inclusion of a radioactive tracer along with blue dye resulted in a significantly lower false-negative rate. Although there were variations in the false-negative rate according to injection location, none were significant. CONCLUSIONS The use of blue dye should be accompanied by a radioactive tracer to achieve a significantly lower false-negative rate. Location of injection did not have a significant impact on the false-negative rate. Given the limitations of acquiring appropriate data, the false-negative rate should not be used as a metric for training or quality control.
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Affiliation(s)
- Sarah Pesek
- University of Vermont College of Medicine, Burlington, VT 05405, USA
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Hirano A, Kamimura M, Ogura K, Kim N, Hattori A, Setoguchi Y, Okubo F, Inoue H, Miyamoto R, Kinoshita J, Fujibayashi M, Shimizu T. A comparison of indocyanine green fluorescence imaging plus blue dye and blue dye alone for sentinel node navigation surgery in breast cancer patients. Ann Surg Oncol 2012; 19:4112-6. [PMID: 22782671 DOI: 10.1245/s10434-012-2478-0] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Indexed: 12/14/2022]
Abstract
PURPOSE To evaluate two methods of sentinel node navigation surgery (SNNS) using blue dye with and without indocyanine green (ICG) fluorescence imaging (FI) to determine the usefulness of combined ICG and blue dye. METHODS Between 2005 and 2010, a total of 501 patients underwent SNNS in our hospital. Detection of sentinel lymph node (SLN) was performed with sulfan blue (SB) alone until 2008 and with a combination of SB and ICG-FI since 2009. ICG 5 mg and SB 15 mg were injected in the subareolar region, and FI was obtained by a fluorescence imaging device. RESULTS We attempted to identify SLNs in 393 patients by SB alone and in 108 patients by a combination of SB and FI. The mean number of SLNs detected was 1.6 (0-5) for SB alone and 2.2 (1-6) for the combination method. The SLN identification rate was 95.7 % for SB alone and 100 % for the combination method so that the combination was significantly superior to SB in terms of the identification rate (p = 0.0037). In patients who received the combination method, detection of SLN was made through only SB in 1 patient, only ICG in 8 patients, and both in 99 patients. Lymph node metastasis was found in 56 patients with SB alone and in 16 patients with the combination method. Recurrence of an axillary node was observed in 3 patients (0.8 %) with SB alone and in no patients with the combination method. CONCLUSIONS ICG-FI is a useful method and is especially recommended in cases where no radiotracers are available.
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Affiliation(s)
- Akira Hirano
- Department of Breast Surgery, Tokyo Women's Medical University Medical Center East, Nishiogu 2-1-10, Arakawa-ku, Tokyo 116-8567, Japan.
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Dickson-Witmer D, Bleznak AD, Kennedy JS, Stewart AK, Palis BE, Bailey L, Laidley AL, Penman EJ. Breast Cancer Care in the Community: Challenges, Opportunities, and Outcomes. Surg Oncol Clin N Am 2011; 20:555-80, ix. [DOI: 10.1016/j.soc.2011.01.007] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Abstract
The role of the breast cancer surgeon has changed from one with performance of one operation, to a position in which the surgeon is the patient's initial contact, leader of a multidisciplinary team, the clinical leader who ensures that the patient receives the most appropriate breast cancer treatment and then also receives follow up and surveillance services. Breast conservation rates, patient satisfaction rates, clear margins, use of oncoplastic surgical techniques, appropriate referral to other consultants, clinical trial referral, and survival rates are all higher when patients are cared for by breast-focused surgeons. This new role requires greater time both before and after surgery to provide the proper planning and care for these patients. Women with breast cancer should have access to these dedicated breast-focused surgeons. Recognition of this expanding responsibility and reimbursement for this time and expertise is needed so that women with breast cancer can be offered the highest quality of care.
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Baker P, Sillitoe A, Stanley P, Williams A, Davies T, Stephenson S. Training simulators for sentinel lymph node biopsy in malignant melanoma. J Plast Reconstr Aesthet Surg 2008; 61:976-9. [DOI: 10.1016/j.bjps.2007.11.040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2006] [Revised: 06/13/2007] [Accepted: 11/27/2007] [Indexed: 11/28/2022]
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Orr J, Kelley J, Dizon D, Escobar P, Fleming E, Gemignani M, Hetzel D, Hoskins W, Kieback D, Kilgore L, LaPolla J, Lewin S, Lucci J, Markman M, Pothuri B, Powell CB, Tejada-Berges T. Society of gynecologic oncologists position paper: breast cancer care. Gynecol Oncol 2008; 110:7-12. [PMID: 18589209 DOI: 10.1016/j.ygyno.2008.04.009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2008] [Accepted: 04/04/2008] [Indexed: 10/21/2022]
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Chowdhury MM, Dagash H, Pierro A. A systematic review of the impact of volume of surgery and specialization on patient outcome. Br J Surg 2007; 94:145-61. [PMID: 17256810 DOI: 10.1002/bjs.5714] [Citation(s) in RCA: 422] [Impact Index Per Article: 24.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
BACKGROUND AND METHODS Volume of surgery and specialization may affect patient outcome. Articles examining the effects of one or more of three variables (hospital volume of surgery, surgeon volume and specialization) on outcome (measured by length of hospital stay, mortality and complication rate) were analysed. Reviews, opinion articles and observational studies were excluded. The methodological quality of each study was assessed, a correlation between the variables analysed and the outcome accepted if it was significant. RESULTS The search identified 55,391 articles published between 1957 and 2002; 1075 were relevant to the study, of which 163 (9,904,850 patients) fulfilled the entry criteria. These 163 examined 42 different surgical procedures, spanning 13 surgical specialities. None were randomized and 40 investigated more than one variable. Hospital volume was reported in 127 studies; high-volume hospitals had significantly better outcomes in 74.2 per cent of studies, but this effect was limited in prospective studies (40 per cent). Surgeon volume was reported in 58 studies; high-volume surgeons had significantly better outcomes in 74 per cent of studies. Specialization was reported in 22 studies; specialist surgeons had significantly better outcomes than general surgeons in 91 per cent of studies. The benefit of high surgeon volume and specialization varied in magnitude between specialities. CONCLUSION High surgeon volume and specialization are associated with improved patient outcome, while high hospital volume is of limited benefit.
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Affiliation(s)
- M M Chowdhury
- Department of Paediatric Surgery, Institute of Child Health and Great Ormond Street Hospital for Children, London WC1N 1EH, UK.
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Nathanson SD, Grogan JK, DeBruyn D, Kapke A, Karvelis K. Breast Cancer Sentinel Lymph Node Identification Rates: The Influence of Radiocolloid Mapping, Case Volume, and the Place of the Procedure. Ann Surg Oncol 2007; 14:1629-37. [PMID: 17253103 DOI: 10.1245/s10434-006-9313-4] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 10/17/2006] [Accepted: 10/18/2006] [Indexed: 11/18/2022]
Abstract
BACKGROUND We hypothesized that high-volume surgeons performing sentinel lymph node (SLN) biopsy at an academic medical center (AMC) would have the same identification rates at suburban surgical centers (SSCs). METHODS Twenty-one surgeons performed 1199 SLN biopsies in 1187 clinically node-negative patients with an intraoperative gamma probe (IOGP) plus blue dye (at AMC) or blue dye alone (at SSCs). Demographic, radiologic, and pathological data were analyzed by generalized estimating equations logistic regression models. RESULTS Four surgeons (group 1) performed 877 procedures (361, 247, 152, and 117 cases each), 426 with and 451 without IOGP. Seventeen surgeons (group 2) performed 322 procedures (2-92 cases each), 173 with and 149 without IOGP. Group 1 found 411 SLNs (96.5%) with and 419 (92.9%) without IOGP (P = .024). Group 2 found 163 (94.2%) with and 117 (78.5%) without IOGP (P < .0001). The odds of finding the SLN was 2.9 times higher with IOGP (95% confidence interval [95% CI], 1.8, 4.7; P < .001) and 2.7 times higher by group 1 than group 2 surgeons (95% CI, 1.7, 4.3; P < .001), controlling for tumor size and surgery type. CONCLUSIONS High-volume surgeons identified more SLNs with IOGP (at the AMC) than without (at the SSCs). They also were more efficient than low-volume surgeons when blue dye alone was used. Low-volume surgeons were almost as efficient as high-volume surgeons when they used IOGP. Optimal identification of SLNs requires nuclear medicine facilities.
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Affiliation(s)
- S David Nathanson
- Department of Surgery, Henry Ford Health System, 2799 W Grand Boulevard, Detroit, MI 48202, USA.
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Hutchinson JR, Chagpar AB, Scoggins CR, Martin RCG, Carlson DJ, Laidley AL, El-Eid SE, McGlothin TQ, Noyes RD, Ley PB, Tuttle TM, McMasters KM. Surgeon and community factors affecting breast cancer sentinel lymph node biopsy. Am J Surg 2006; 190:903-6. [PMID: 16307943 DOI: 10.1016/j.amjsurg.2005.08.018] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2005] [Revised: 08/08/2005] [Accepted: 08/08/2005] [Indexed: 11/30/2022]
Abstract
BACKGROUND We sought to determine whether the results of sentinel lymph node (SLN) biopsy are related to practice and community factors. METHODS This prospective study included more than 300 surgeons from a variety of practice environments. Most surgeons had minimal experience with SLN biopsy prior to this study. Patients underwent attempted SLN biopsy, followed by completion axillary dissection. Univariate and multivariate analyses were performed to assess factors related to the SLN identification rate and the false negative rate. RESULTS A total of 4131 patients were enrolled. SLN identification rate was 93%; the false negative (FN) rate was 7.9%. The only factor that was significantly associated with improved SLN identification rate (odds ratio [OR] 1.60, 95% confidence interval [CI] 1.12 to 2.36, P = .0126) and FN rate (OR 2.39, 95% CI 1.32 to 4.79, P = .0073) was surgeon experience (>20 SLN cases). CONCLUSIONS Surgeon experience is the major factor that contributes to improved SLN biopsy results. SLN biopsy can be performed equally well by community and academic surgeons.
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Affiliation(s)
- Julie R Hutchinson
- Division of Surgical Oncology, Department of Surgery, University of Louisville, Louisville, KY 40292, USA
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20
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Abstract
A significant effect of hospital case volume on perioperative mortality has been documented for a variety of malignancies that require technically challenging operative procedures and complex perioperative management. The effect of case volume on outcome is less clear for the more common cancers, such as breast and colon cancers, that are less technically challenging and require little in the way of specialized care in the postoperative period. For these cancers perioperative mortality is minimal and one must look at other end points such as long-term survival and functional results. The literature demonstrating improved outcomes in terms of mammographical sensitivity, breast-conservation rates, specimen to tumour volume ratios in breast-conserving surgery, sentinel node biopsy success rates, and 5-year survival is reviewed.
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21
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Chao C, Wong SL, Tuttle TM, Noyes RD, Carlson DJ, Ley P, McGlothin T, Laidley A, Simpson D, Edwards MJ, McMasters KM. Sentinel Lymph Node Biopsy for Breast Cancer: Improvement in Results Over Time. Breast J 2004; 10:337-44. [PMID: 15239793 DOI: 10.1111/j.1075-122x.2004.21345.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Many modifications in the technique of sentinel lymph node (SLN) biopsy for breast cancer have taken place since it was first introduced. This analysis was undertaken to determine, in a large multi-institutional study, whether SLN biopsy results have improved over time. Patients with clinical stage T1-2, N0 breast cancer were enrolled in this prospective study between August 1997 and February 2002. SLN biopsy was performed using blue dye and/or radioactive colloid along with completion level I/II axillary dissection in all patients. The majority of subjects included in this study represent the surgeons' initial experience with SLN biopsy for breast cancer. Statistical comparison of the SLN identification (ID) rate and false-negative (FN) rate were performed by chi-squared analysis. A total of 3370 subjects from 300 surgeons were enrolled in the study. Collectively the SLN ID rate, as well as the mean number of SLNs removed per patient has improved, while the FN rate has remained fairly constant over time. The improved ID rate may be related to improved technical details, while the FN rate has not changed significantly. This highlights the ongoing need for surgeons to perform backup axillary dissection during their initial learning phase.
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Affiliation(s)
- Celia Chao
- University of Texas Medical Branch, Galveston, Texas 77555, USA.
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22
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Ellis RL, Seifert PJ, Neal CE, Pavolka KR, Mann JL, Malafa MP, Wichterman KA, Ross DS, Dunnington GL. Periareolar injection for localization of sentinel nodes in breast cancer patients. Breast J 2004; 10:94-100. [PMID: 15009034 DOI: 10.1111/j.1075-122x.2004.21264.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The goal of this study was to evaluate the periareolar injection of technetium 99m sulfur colloid to identify axillary sentinel nodes and compare the number of sentinel lymph nodes identified with preoperative lymphoscintigraphy to intraoperative biopsy using a handheld gamma probe. A total of 104 consecutive patients diagnosed with invasive breast cancer participated in this prospective study, with 81 patients receiving an intradermal periareolar injection and 23 patients receiving an intradermal peritumoral injection of filtered technetium 99m sulfur colloid. Preoperative lymphoscintigraphy was performed for sentinel node mapping and localization. In addition to selective sentinel node biopsy, axillary dissection was performed on all patients to determine false-negative rates. Routine histologic staining was performed on all identified nodes, along with immunohistochemical staining of sentinel nodes negative on initial routine staining. With an intradermal periareolar injection, the sentinel node identification rate was 91.4% (74/81), axillary metastatic rate 35.1% (26/74), sentinel node positive only 61.5% (16/26), and false negative 3.8% (1/26). With an intradermal peritumoral injection, the sentinel node identification rate was 91.3% (21/23), axillary metastatic rate 42.9% (9/21), sentinel node positive only 88.9% (8/9), and false negative 0% (0/9). A total of 241 sentinel nodes were identified with biplanar lymphoscintigraphy and 173 sentinel nodes were harvested during surgery, yielding a 28.2% increase in sentinel nodes identified with lymphoscintigraphy. This study demonstrates that intradermal periareolar injection of filtered technetium 99m sulfur colloid is successful in identifying axillary sentinel nodes with a low false-negative rate. Preoperative lymphoscintigraphy aids in the identification and surgical planning of sentinel node biopsy and provides an objective measure of surgical performance.
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Affiliation(s)
- Richard L Ellis
- Department of Radiology, Southern Illinois University School of Medicine, Springfield, Illinois, USA.
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23
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Allweis TM, Badriyyah M, Bar Ad V, Cohen T, Freund HR. Current controversies in sentinel lymph node biopsy for breast cancer. Breast 2004; 12:163-71. [PMID: 14659322 DOI: 10.1016/s0960-9776(03)00024-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Despite the widespread use of sentinel lymph node biopsy (SLNBx) in the surgical management of breast cancer patients, several areas remain controversial. The following controversies are reviewed: Learning curves and validation studies. There clearly is a learning curve, and a completion ALND should be done until adequate proficiency is exhibited, both in terms of identification and false-negative rates. Location of injection. Intradermal injection offers superior identification rates compared with peritumoral injection, with comparable false-negative rates. Subareolar injection is as accurate as peritumoral injection. The value of scintigraphy. Routine scintigraphy does not enhance identification or false-negative rates. Mapping agents. Blue dye and radioactive tracer combined to provide a higher identification rate than either used alone.SLNBx in DCIS. In patients with a high risk of microinvasion, such as large tumors, a mass or high-grade DCIS-SLNBx is justified.SLNBx following neoadjuvant chemotherapy. Although there is evidence that SLNBx after neoadjuvant chemotherapy may be accurate, these data should be applied cautiously. Implications of non axillary SLN, especially internal mammary nodes. Data do not support routine resection of internal mammary sentinel lymph nodes outside a clinical trial. Implications of micrometastases in the sentinel lymph node seen only on immunohistochemistry. Since the significance of such metastases is unclear, decisions regarding treatment of these patients should be individualized. The value of completion axillary lymph node dissection. Is being addressed in clinical trials. Until those studies mature, completion ALND should be performed for patients with SLN metastases, but may be abandoned for patients with a negative SLN.
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Affiliation(s)
- T M Allweis
- Department of Surgery, Hadassah University Hospital, Jerusalem, Israel
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24
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Suga K, Yuan Y, Okada M, Matsunaga N, Tangoku A, Yamamoto S, Oka M. Breast sentinel lymph node mapping at CT lymphography with iopamidol: preliminary experience. Radiology 2003; 230:543-52. [PMID: 14699178 DOI: 10.1148/radiol.2302021380] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
PURPOSE To evaluate sentinel lymph node (SLN) mapping with interstitial computed tomographic (CT) lymphography with small volumes of iopamidol for direction of SLN biopsy in breast cancer. MATERIALS AND METHODS Thin-section transverse and three-dimensional CT images that included the breast and axilla were acquired at multi-detector row helical CT in 17 patients with operable breast cancer before subcutaneous injection of 2 mL of undiluted iopamidol into peritumoral and periareolar areas and 1-5 minutes after massage of injection sites. Location and size of SLNs were assessed at CT lymphography and were compared with SLNs at standard axillary lymph node dissection with blue dye staining. RESULTS CT lymphography allowed localization of SLNs in all patients by means of visualization of a direct connection between an SLN and its afferent lymphatic vessels draining from the injection sites. Afferent vessels were joined and drained into a single axillary SLN, except in four patients with two or three SLNs, including a parasternal one. SLNs did not enhance because of rerouting of lymph flow in four patients. At surgery, SLNs that were stained or not stained with blue dye were easily found with CT lymphographic guidance. Tumoral infiltration was not evident in any resected nodes, except for infiltration in one patient with micrometastasis in SLN alone and infiltration in four patients with massive metastasis in both SLN and distant nodes. CONCLUSION Because preoperative CT lymphography-guided SLN mapping provides SLN position with detailed lymphatic anatomy, it may be useful for the direction of breast SLN biopsy.
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Affiliation(s)
- Kazuyoshi Suga
- Department of Radiology, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan.
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Buchholz TA, Strom EA, McNeese MD, Hunt KK. Radiation therapy as an adjuvant treatment after sentinel lymph node surgery for breast cancer. Surg Clin North Am 2003; 83:911-30, x. [PMID: 12875602 DOI: 10.1016/s0039-6109(03)00048-3] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Radiation therapy is an effective treatment of micrometastatic disease involving lymph nodes. Correspondingly, radiation may be an important adjuvant treatment for selected patients who undergo sentinel lymph node surgery. The specific cohorts for whom radiation maybe of benefit include those at risk for a false-negative surgery, patients with a positive sentinel lymph node who elect to forgo an axillary dissection, and patients with drainage to the internal mammary lymph nodes. For these patients, radiation treatment fields must be specifically designed to include the appropriate nodal regions within the target treatment volumes.
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Affiliation(s)
- Thomas A Buchholz
- Department of Radiation Oncology, The University of Texas M.D. Anderson Cancer Center, 1515 Holcombe Boulevard, Houston, TX 77030, USA.
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26
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Haynes G, Garske D, Case D, Shen P, Levine EA, Perrier ND. Effect of Massage Technique on Sentinel Lymph Node Mapping for Cancer of the Breast. Am Surg 2003. [DOI: 10.1177/000313480306900612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Sentinel lymph node (SLN) mapping has substantially changed the nature of surgery for cancer of the breast. Variables such as tracer type, volume, injection site, timing, and surgical experience have all been extensively evaluated. However, little attention has been paid to the technique of massage for SLN procedures. We sought to evaluate the effects of three different massage techniques on mapping success or accuracy of SLN mapping for breast cancer. All lymphatic mapping procedures for breast cancer at our tertiary-care center were performed by three experienced surgeons using both colloid and dye followed by a 5-minute massage. All data pertaining to SLN identification, histopathology, tumor characteristics, and patient demographics were entered into the Breast Care Center database. Consistent and uniquely differing massage techniques classified as resuscitative, buffer, or knead-like were each used by a specific surgeon. The last 25 consecutive cases performed by two surgeons and the last 24 by one surgeon were evaluated. The overall rate of SLN identification was 97 per cent, and the overall accuracy was 98.7 per cent. There was no statistically significant difference in the rate of SLN identification or accuracy between techniques. The proportions of blue-stained SLNs were similar, but the resuscitative technique yielded fewer hot SLNs (Fisher's exact test, P = 0.02). This method also yielded one false negative case. The three different massage techniques yielded a similar number of blue-stained SLNs. The resuscitative technique yielded fewer hot SLNs than the kneading and buffer methods. Our results failed to demonstrate a superior breast massage technique for identifying sentinel nodes. A larger randomized trial is needed to confirm these findings.
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Affiliation(s)
- Georgia Haynes
- From the Surgical Oncology Service, Department of Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Diane Garske
- From the Surgical Oncology Service, Department of Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Doug Case
- From the Surgical Oncology Service, Department of Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Perry Shen
- From the Surgical Oncology Service, Department of Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Edward A. Levine
- From the Surgical Oncology Service, Department of Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina
| | - Nancy D. Perrier
- From the Surgical Oncology Service, Department of Surgery, Wake Forest University Health Sciences, Winston-Salem, North Carolina
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27
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Classe JM, Curtet C, Campion L, Rousseau C, Fiche M, Sagan C, Resche I, Pioud R, Andrieux N, Dravet F. Learning curve for the detection of axillary sentinel lymph node in breast cancer. EUROPEAN JOURNAL OF SURGICAL ONCOLOGY 2003; 29:426-33. [PMID: 12798745 DOI: 10.1016/s0748-7983(03)00052-0] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
AIM Sentinel axillary lymph node (SALN) detection is a new technique. Surgeons must progress up a learning curve in order to guarantee quality and safety equivalent to axillary lymphadenectomy. To ensure accurate staging of patients this learning curve must include SALN detection and an axillary lymphadenectomy. The aim of our work was to validate the principles and evaluate the consequences of learning curve for SALN detection from a prospective series of 200 consecutive patients. METHOD Prospective assessment was made of the detection and false negative rates, post operative morbidity as abcess and seroma, and length of hospital stay. RESULTS We evaluated the performance from the first to the hundredth case for each surgeon. Detection rate improved to 85% after patient number 10. False negative rate was less than 6%. Post operative axillary morbidity included 11% of seromas and 2% of abcess. Mean hospital stay was 2.8 days. CONCLUSION Multidisciplinary validation of the learning period contributes to an accurate and safe SALN.
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Affiliation(s)
- J M Classe
- Service de Chirurgie Oncologique, Centre René Gauducheau, Site Hôpital Nord, Nantes, France.
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28
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Jennings WC. Why perform randomized clinical trials for sentinel node surgery for breast cancer? Am J Surg 2003; 185:601-2; author reply 603-4. [PMID: 12781895 DOI: 10.1016/s0002-9610(03)00019-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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Cunningham EJ, Debar S, Bell BA. Association between surgeon seniority and outcome in intracranial aneurysm surgery. Br J Neurosurg 2003; 17:124-8; discussion 129. [PMID: 12820753 DOI: 10.1080/0268869031000108963] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Specialist surgical registrars perform surgery as a requirement of their training, but the effect of the surgeon's level of training on outcome in intracranial aneurysm surgery is not known. This study addresses this question. A cohort of 278 consecutive patients who underwent a craniotomy to clip a recently ruptured intracranial aneurysm between January 1995 and December 1999 was assessed. Patients were divided into three groups according to whether the operating surgeon was a registrar, a senior registrar or a consultant. The frequency of a good outcome (defined as a Glasgow outcome score of 5) was compared in the three groups. Registrars operated on 91 patients (33%), senior registrars on 60 (21%) and consultants on 127 (46%). Between the three groups there was no statistically significant difference in patient age, male: female ratio, the timing of surgery after the haemorrhage, or the proportion of patients requiring preoperative ventriculostomy or with angiographic vasospasm, but more patients operated on by consultants had favourable admission World Federation of Neurological Surgeons grades. About two-thirds of patients achieved a Glasgow outcome score of 5 at 6 months, and there were no statistically significant differences in outcome between the three groups at discharge, at 6 months and at 1 year. Intracranial aneurysm surgery by trainees and consultants was not associated with differences in patient outcome in a cohort of patients treated at a University teaching hospital.
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Affiliation(s)
- E J Cunningham
- Department of Neurosurgery, St George's Hospital Medical School, Atkinson Morley's Hospital, Wimbledon, London, UK
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30
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Suga K, Ogasawara N, Okada M, Matsunaga N. Interstitial CT lymphography-guided localization of breast sentinel lymph node: preliminary results. Surgery 2003; 133:170-9. [PMID: 12605178 DOI: 10.1067/msy.2003.17] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Accurate localization of the breast sentinel lymph node (SLN) can be challenging as a minimally invasive approach to the treatment of early-stage breast cancer. We tested the potential capability of interstitial computed tomographic lymphography (CT-LG) using a conventional contrast agent (iopamidol) for SLN mapping. METHODS In 14 female dogs, 0.5 and 1 mL of undiluted iopamidol was injected subcutaneously into the 2 skin areas overlying the mammary gland. Contiguous, 2 mm-thick multidetector helical CT images were obtained through the upper breast and axilla before, and for 60 minutes after, gentle massage at the injection site. Three-dimensional (3D) CT images were obtained from the postcontrast images showing the greatest SLN enhancement. This CT-LG with 2 mL of iopamidol was also evaluated in 5 human female volunteers. RESULTS The direct connection of SLN and lymphatic vessels draining from the injection sites in the animal models was clearly visualized, even with 0.5 mL of iopamidol. With this dose, the SLN attenuation was maximally enhanced, with a mean of 274 Hounsfield units (HU) on the first postcontrast images. The topographic 3D images provided the comprehensive anatomy of these lymphatic pathways. Of the 28 SLNs and 184 distant nodes visualized on CT images, all of the SLNs (100%) and 161 (87.5%) of the distant nodes could be resected at premortem and/or postmortem, with a good correlation in the locations and sizes with those on the CT images. The CT-LG effectively localized 5 SLNs with averaged maximum attenuation of 223 HU in the human volunteers, without any significant adverse effects. CONCLUSION Interstitial CT-LG using small volumes of iopamidol can sufficiently visualize breast lymphatic drainage and may have potential utility for breast SLN mapping.
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Affiliation(s)
- Kazuyoshi Suga
- Department of Radiology, Yamaguchi University School of Medicine, 1-1-1 Minamikogushi, Ube, Yamaguchi 755-8505, Japan
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Suga K, Ogasawara N, Yuan Y, Okada M, Matsunaga N, Tangoku A. Visualization of breast lymphatic pathways with an indirect computed tomography lymphography using a nonionic monometric contrast medium iopamidol: preliminary results. Invest Radiol 2003; 38:73-84. [PMID: 12544070 DOI: 10.1097/00004424-200302000-00002] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
RATIONALE AND OBJECTIVES The capability of an indirect computed tomographic lymphography (CT-LG) using a nonionic monometric contrast medium iopamidol for visualizing breast lymphatic pathways was preliminarily tested. MATERIALS AND METHODS In 10 female dogs, a total of 0.5 and 1 mL of undiluted iopamidol was injected subcutaneously into the skin areas overlying the both caudal mammary glands. Contiguous 2-mm-thick multidetector raw helical CT images were obtained through the upper thorax and axilla before and during 60 minutes after gentle massage at the injection sites, with reconstruction into three-dimensional (3D) postcontrast CT images. The first lymph node (1st LN) directly draining from the injection sites was marked under CT guidance, followed by pre- and postmortem examinations. This CT-LG with 2-mL iopamidol was also attempted in five human female volunteers. RESULTS Even with 0.5-mL iopamidol, the CT-LG clearly visualized the direct connection of the 1st LN and lymphatic vessels draining from the injection sites throughout the examination time in all the animals, with the maximum CT attenuation of 269 Hounsfield units (HU) +/- 137 in the 1st LN on the first postcontrast images. The topographic 3D images provided comprehensive anatomic outlines of these lymphatic pathways. Of the total of 20 opacified 1st LN and 110 distant nodes, all the 1st LN (100%) and 92 (83.6%) distant nodes could be resected at pre- or postmortem, with a good correlation with the CT images. The CT-LG also effectively localized the 1st LN with the maximum attenuation of 223 HU +/- 63 in the human volunteers, without any significant late adverse effects. CONCLUSION Indirect CT-LG with iopamidol may have excellent potential for visualizing breast lymphatic drainage and for preoperative localization of breast sentinel lymph nodes.
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Affiliation(s)
- KazuyoshiI Suga
- Department of Radiology, Yamaguchi University School of Medicine, Ube, Japan.
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Suga K, Yuan Y, Ogasawara N, Okada M, Matsunaga N. Localization of Breast Sentinel Lymph Nodes by Mr Lymphography With a Conventional Gadolinium Contrast Agent. Preliminary Observations in Dogs and Humans. Acta Radiol 2003. [DOI: 10.1034/j.1600-0455.2003.00014.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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