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Jaafar E, Gaultier V, Wohrer H, Estevez JP, Gonthier C, Koskas M. Impact of sentinel lymph node mapping on survival in patients with high-risk endometrial cancer in the early stage: A matched cohort study. Int J Gynaecol Obstet 2024; 165:677-684. [PMID: 38226675 DOI: 10.1002/ijgo.15315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/06/2023] [Indexed: 01/17/2024]
Abstract
OBJECTIVE The aim of this study was to compare patient survival using sentinel lymph node (SLN) procedure and pelvic lymphadenectomy for stating early-stage high risk endometrial cancer. METHODS Patients who underwent surgery for early-stage high risk endometrial cancer between 2010 and 2017 were extracted from the incidence registry of the SEER program. We identified patients who underwent SLN mapping. Patients who initially underwent pelvic lymphadenectomy were selected as the comparison group. One-to-one matching was performed according to age, ethnicity, histology, extension and grade. The primary outcome was disease-specific survival. The secondary outcome was overall survival. RESULTS A total of 326 patients who underwent SLN mapping and 326 who underwent pelvic lymphadenectomy initially were included in the study. The three-year analysis did not find a significant difference between the SLN and lymphadenectomy groups on disease-specific survival probability (88.2% vs 82.7, P = 0.07) and on overall survival probability (82.7% vs 78.2%, P = 0.57). Patients who underwent SLN mapping had a lower mean number of lymph nodes removed (mean 3 vs 16, P < 0.001) and there was a higher rate of patients with positive pelvic lymph nodes (18% vs 14%, P = 0.04). Following adjustment for confounding factors, disease-specific survival did not vary according to the lymph node intervention performed (P = 0.056), but the SLN group had better overall survival than those in the lymphadenectomy group (P = 0.047). CONCLUSION The SLN technique was not associated with poorer disease-specific survival than pelvic lymphadenectomy even after adjustment. These results suggest that SLN is an acceptable and safe procedure in surgical staging for early-stage high-risk endometrial cancer.
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Affiliation(s)
- Eya Jaafar
- Gynecological Department, Bichat Hospital, Paris Diderot University, Paris, France
| | - Victor Gaultier
- Gynecological Department, Bichat Hospital, Paris Diderot University, Paris, France
- Gynecological Department, University Paris Cité, Paris, France
| | - Henri Wohrer
- Gynecological Department, Bichat Hospital, Paris Diderot University, Paris, France
- Gynecological Department, University Paris Cité, Paris, France
| | - Juan Pablo Estevez
- Gynecological Department, Bichat Hospital, Paris Diderot University, Paris, France
| | - Clementine Gonthier
- Gynecological Department, Bichat Hospital, Paris Diderot University, Paris, France
| | - Martin Koskas
- Gynecological Department, Bichat Hospital, Paris Diderot University, Paris, France
- Gynecological Department, University Paris Cité, Paris, France
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Parpex G, Bucau M, Estevez JP, Raimond E, Ouldamer L, Carcopino X, Touboul C, Bendifallah S, Graesslin O, Lavoue V, Bolze PA, Koskas M. Impact of vulvar reconstruction on the accuracy of a nomogram for predicting local recurrence after surgery for vulvar cancer. Gynecol Oncol 2022; 165:143-148. [PMID: 35177278 DOI: 10.1016/j.ygyno.2022.02.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 01/17/2022] [Accepted: 02/06/2022] [Indexed: 11/04/2022]
Abstract
BACKGROUND DATA Vulvar carcinoma is a rare disease accounting for 3%-5% of all gynaecological cancers. Although surgery is the standard treatment at an early stage, the outcomes are highly correlated with clear resection margins. Therefore, surgical defects can be important and require reconstruction. The aim of this study was to evaluate vulvar reconstructions using a previously validated nomogram predicting the risk of local recurrence at 2 years. METHODS Patients who underwent surgery for vulvar cancer between 1998 and 2017 were extracted from eight FRANCOGYN centres. We estimated the probability of local recurrence at 2 years using a previously validated nomogram and compared it with actual relapse in patients with or without vulvar reconstruction. Patients were clustered into tiertiles according to their nomogram score: low-, intermediate-, and high-risk for local relapse probability. RESULTS We reviewed 254 patients, of whom 49 underwent immediate vulvar reconstruction. The predicted and actual probability of two-year local relapse were 20.1% and 15.7%, respectively, with a concordance index of 0.75. In the low- and intermediate-risk groups, the difference between predicted and observed recurrence was less than 10% in patients with or without vulvar reconstruction. For the high-risk group, the difference reached 25% and observed recurrence probability was lower in patients who underwent vulvar plasty compared with those who did not (20.0% vs. 36.2%, respectively). Local recurrence-free survival rates following vulvar reconstruction were comparable at two years (82.1% vs. 84.8%, respectively, p = 0.26). CONCLUSION Vulvar reconstruction after surgical resection for vulvar cancer is safe. Vulvar reconstruction should be considered in aggressive cases to decrease local recurrence.
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Affiliation(s)
- Guillaume Parpex
- Department of Gynaecology and Obstetrics, Bichat University Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), France; Paris University, Paris, France.
| | - Margot Bucau
- Department of Pathology, Bichat University Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), France
| | - Juan Pablo Estevez
- Department of Gynaecology and Obstetrics, Bichat University Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), France
| | - Emilie Raimond
- Department of Obstetrics and Gynaecology, Institute Alix de Champagne, Universitary Hospital of Reims, University of Reims Champagne Ardenne (URCA), 51092 Reims Cedex, France
| | - Lobna Ouldamer
- Department of Obstetrics and Gynaecology, Centre, Hospitalier Régional Universitaire de Tours, Hôpital Bretonneau, Tours, France
| | - Xavier Carcopino
- Hôpital Nord (APHM), Department of Obstetrics and Gynecology, Aix-Marseille Université (AMU), CNRS, IRD, IMBE, Marseille, France
| | - Cyril Touboul
- Paris University, Paris, France; Department of Gynaecology and Obstetrics, Tenon University Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), France
| | - Sofiane Bendifallah
- Department of Gynaecology and Obstetrics, Tenon University Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), France
| | - Olivier Graesslin
- Department of Obstetrics and Gynaecology, Institute Alix de Champagne, Universitary Hospital of Reims, University of Reims Champagne Ardenne (URCA), 51092 Reims Cedex, France
| | - Vincent Lavoue
- Department de Gynaecology, Obstetrics and Reproductive Medicine, University Hospital of Rennes, Rennes, France; Faculty of Medicine, University of Rennes 1, Rennes, France
| | - Pierre-Adrien Bolze
- Université Lyon 1, Faculté de Médecine Lyon Sud, Hospices Civils de Lyon, Department of Gynaecologic Surgery and Oncology, Obstetrics, Hôpital Lyon Sud, Pierre Bénite, France
| | - Martin Koskas
- Department of Gynaecology and Obstetrics, Bichat University Hospital, Assistance Publique des Hôpitaux de Paris (AP-HP), France; Paris University, Paris, France
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Bougherara L, Azaïs H, Béhal H, Canlorbe G, Ballester M, Bendifallah S, Coutant C, Lavoue V, Ouldamer L, Graesslin O, Touboul C, Estevez JP, Collinet P. Does lymphadenectomy improve survival in patients with intermediate risk endometrial cancer? A multicentric study from the FRANCOGYN Research Group. Int J Gynecol Cancer 2018; 29:282-289. [DOI: 10.1136/ijgc-2018-000051] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2018] [Revised: 10/08/2018] [Accepted: 10/08/2018] [Indexed: 11/04/2022] Open
Abstract
ObjectiveThe role of lymphadenectomy in intermediate risk endometrial cancer remains uncertain. We evaluated the impact of lymphadenectomy on overall survival and relapse-free survival for patients with intermediate risk endometrial cancer.MethodsWe retrospectively reviewed patients from the FRANCOGYN database with intermediate risk endometrial cancer, based on pre-operative and post-operative criteria (type 1, grade 1–2 tumors with deep (> 50%) myometrial invasion and no lymphovascular space invasion), who received primary surgical treatment between November 2002 and August 2013. We compared overall survival and relapse-free survival between staged and unstaged patients.ResultsFrom 1235 screened patients, we selected 108 patients with intermediate risk endometrial cancer. Eighty-two (75.9%) patients underwent nodal staging (consisting of pelvic +/- para-aortic lymphadenectomy). Among them, 35 (32.4%) had lymph node disease. The median follow-up was 25 months (range 0.4 to 155.0). The overall survival rates were 82.5% for patients staged (CI 64.2 to 91.9) vs 77.9 % for unstaged patients (CI 35.4 to 94.2) (P = 0.73). The relapse-free survival rates were 68.9% for staged patients (CI 51.2 to 81.3) vs 68.8% for unstaged patients (CI 29.1 to 89.3) (P=0.67).ConclusionSystematic nodal staging does not appear to improve overall survival and relapse-free survival for patients with IR EC but could provide information to tailor adjuvant therapy. Sentinel lymph node dissection may be an effective and less invasive alternative staging technique and should provide a future alternative for this population.
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Kerbage Y, Canlorbe G, Estevez JP, Grabarz A, Mordon S, Uzan C, Collinet P, Azaïs H. [Microscopic peritoneal metastases of epithelial ovarian cancers. Clinical relevance, diagnostic and therapeutic tools]. ACTA ACUST UNITED AC 2018; 46:497-502. [PMID: 29656069 DOI: 10.1016/j.gofs.2018.03.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2017] [Indexed: 10/17/2022]
Abstract
Understanding the biology and progression mechanisms of peritoneal metastases in ovarian epithelial cancers (EOC) is important because peritoneal carcinomatosis is present or will occur during surveillance of a majority of patients. Despite the clinical remission achieved after complete macroscopic cytoreductive surgery and platinum-based chemotherapy, 60% of patients will develop peritoneal recurrence. This suggests that microscopic lesions, which are not eradicated by surgery may be present and may participate in the mechanisms leading to peritoneal recurrence. This paper discusses current available data on microscopic peritoneal metastases, their diagnosis and their treatment. We reviewed all publications dealing with microscopic peritoneal metastases of EOC between 1980 and 2017. The most recent and most relevant publications dealing with the treatment modalities of these metastases were selected. Peritoneal and epiploic microscopic localizations would occur in 1.2 to 15.1% of cases at early-stage and are not treated during conventional surgery. They could represent a potential therapeutic target. Local treatments (intraperitoneal chemotherapy, photodynamic therapy, fluorescence-guided surgery) seem to be necessary in addition to surgery and chemotherapy and may help reduce the risk of peritoneal recurrence. The place of these treatments in the management of EOC remains to be defined by subsequent researches.
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Affiliation(s)
- Y Kerbage
- Service de chirurgie gynécologique, CHU de Lille, 59000 Lille, France; Inserm, U1189, ONCO-THAI, thérapies laser assistées par l'imagerie, 59000 Lille, France
| | - G Canlorbe
- Service de chirurgie et oncologie gynécologique et mammaire, hôpitaux universitaires Pitié-Salpêtrière-Charles-Foix, Pitié-Salpêtrière, AP-HP, 47/83, boulevard de l'Hôpital, 75013 Paris, France
| | - J P Estevez
- Service de chirurgie gynécologique, CHU de Lille, 59000 Lille, France
| | - A Grabarz
- Service de chirurgie gynécologique, CHU de Lille, 59000 Lille, France; Inserm, U1189, ONCO-THAI, thérapies laser assistées par l'imagerie, 59000 Lille, France
| | - S Mordon
- Inserm, U1189, ONCO-THAI, thérapies laser assistées par l'imagerie, 59000 Lille, France
| | - C Uzan
- Service de chirurgie et oncologie gynécologique et mammaire, hôpitaux universitaires Pitié-Salpêtrière-Charles-Foix, Pitié-Salpêtrière, AP-HP, 47/83, boulevard de l'Hôpital, 75013 Paris, France
| | - P Collinet
- Service de chirurgie gynécologique, CHU de Lille, 59000 Lille, France; Inserm, U1189, ONCO-THAI, thérapies laser assistées par l'imagerie, 59000 Lille, France
| | - H Azaïs
- Inserm, U1189, ONCO-THAI, thérapies laser assistées par l'imagerie, 59000 Lille, France; Service de chirurgie et oncologie gynécologique et mammaire, hôpitaux universitaires Pitié-Salpêtrière-Charles-Foix, Pitié-Salpêtrière, AP-HP, 47/83, boulevard de l'Hôpital, 75013 Paris, France.
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Azaïs H, Estevez JP, Foucher P, Kerbage Y, Mordon S, Collinet P. Dealing with microscopic peritoneal metastases of epithelial ovarian cancer. A surgical challenge. Surg Oncol 2017; 26:46-52. [PMID: 28317584 DOI: 10.1016/j.suronc.2017.01.001] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 01/01/2017] [Accepted: 01/05/2017] [Indexed: 12/31/2022]
Abstract
Understanding biology and progression mechanisms of peritoneal metastases of epithelial ovarian cancer (EOC) is a cornerstone in the knowledge and the comprehensive management of the disease. Despite clinical remission after the association of complete cytoreductive surgery and platinum-based chemotherapy, peritoneal recurrence still occurs in 60% of patients. Eligible studies, published from 1980 to June 2016, were retrieved through ClinicalTrials.gov, MEDLINE, Cochrane databases and bibliography searches. We reviewed all publications that deals with microscopic peritoneal metastases of EOC in French and English. To discuss expected benefits of intraperitoneal (IP) chemotherapy, fluorescence-guided surgery or IP photodynamic therapy, we reviewed most recent and relevant studies. The final reference list was generated on the basis of originality and relevance to the broad scope of this review. Published data concerning early-stage ovarian cancer suggest that occult peritoneal or epiploic metastases are present in 1.2%-15.1% of cases. In the frequent case of advanced-stage disease, residual microscopic lesions are ignored by conventional surgery. We are convinced that microscopic peritoneal metastases are a relevant surgical therapeutic target. This article discusses existing data on microscopic peritoneal metastases, the treatment indications, the diagnostic and therapeutic surgical approaches to be developed and their expected benefits. A local therapeutic strategy to target microscopic lesions is needed in addition to complete macroscopic cytoreductive surgery to decrease the rate of peritoneal recurrence. Intraperitoneal chemotherapy, and targeted photodynamic therapy could play a role in this new paradigm. The roles of these different options must be defined by future researches.
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Affiliation(s)
- Henri Azaïs
- AP-HP, Pitié-Salpêtrière Hospital, Department of Gynecologic and Breast Surgery, F-75013 Paris, France; Univ. Lille, U1189 - ONCO-THAI - Image Assisted Laser Therapy for Oncology, F-59000 Lille, France.
| | | | - Périne Foucher
- CHU Lille, Department of Gynecology, F-59000 Lille, France
| | - Yohan Kerbage
- Univ. Lille, U1189 - ONCO-THAI - Image Assisted Laser Therapy for Oncology, F-59000 Lille, France; CHU Lille, Department of Gynecology, F-59000 Lille, France
| | - Serge Mordon
- Univ. Lille, U1189 - ONCO-THAI - Image Assisted Laser Therapy for Oncology, F-59000 Lille, France
| | - Pierre Collinet
- Univ. Lille, U1189 - ONCO-THAI - Image Assisted Laser Therapy for Oncology, F-59000 Lille, France; CHU Lille, Department of Gynecology, F-59000 Lille, France
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Kerbage Y, Azaïs H, Estevez JP, Merlot B, Collinet P. [Current controversies regarding power morcellation and future directions]. ACTA ACUST UNITED AC 2016; 44:417-23. [PMID: 27363612 DOI: 10.1016/j.gyobfe.2016.05.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 05/23/2016] [Indexed: 12/29/2022]
Abstract
Modern surgery tends to the improvement of minimally invasive strategies. Laparoscopy, rooted in practices for years, supplanted laparotomy in many directions. Regarding the extraction of large uterus, morcellation is currently the only way to externalize surgical specimens (myomas, uterine), without increasing the skin opening while allowing to reduce postoperative complications compared to laparotomy. However, in 2014, the Food and Drug Administration (FDA) discourages the use of uterine morcellation because of oncological risk. This recommendation has been challenged by a part of the profession. Our review has sought to identify the evidence for and against the use of morcellation. We also tried to quantify surgical risk and the current means of prevention. The incidence of uterine sarcomas is still poorly identified and preoperative diagnostic facilities remain inadequate. The small number of retrospective studies currently available could not enable any recommendation. The evaluation of morcellation devices and the improvement of preoperative diagnosis modalities (imaging, preoperative biopsy) are to continue to minimize the oncological risk.
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Affiliation(s)
- Y Kerbage
- Faculté de médecine, université de Lille, CHU de Lille, 59000 Lille, France; Service de gynécologie-obstétrique, CHU de Lille, 59000 Lille, France.
| | - H Azaïs
- Faculté de médecine, université de Lille, CHU de Lille, 59000 Lille, France; Service de gynécologie-obstétrique, CHU de Lille, 59000 Lille, France
| | - J P Estevez
- Service de gynécologie-obstétrique, CHU de Lille, 59000 Lille, France
| | - B Merlot
- Service de gynécologie-obstétrique, CHU de Lille, 59000 Lille, France
| | - P Collinet
- Faculté de médecine, université de Lille, CHU de Lille, 59000 Lille, France; Service de gynécologie-obstétrique, CHU de Lille, 59000 Lille, France
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Estevez JP, Hequet D, Dubot C, Fourchotte V, De La Motte Rouge T, Becette V, Rouzier R. [Fertility sparing treatment in women affected by cervical cancer larger than 2cm]. Bull Cancer 2015; 103:173-9. [PMID: 26681641 DOI: 10.1016/j.bulcan.2015.11.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Revised: 10/27/2015] [Accepted: 11/10/2015] [Indexed: 11/17/2022]
Abstract
OBJECTIVE We report our experience on fertility sparing treatment in young women affected by cervical cancer of more than 2cm. METHODS Between July 2012 and February 2014, five patients presenting cervical tumors larger than 2cm (IB1>2cm) (23-35) and wishing to preserve fertility have been treated at our institution. Laparoscopic pelvic and para-aortic lymphadenectomy was performed for all patients. When lymph nodes were free of disease, patients had neoadjuvant chemotherapy followed by surgical conservative treatment. RESULTS Four patients underwent a cisplatin based neoadjuvant chemotherapy before conservative surgery: radical trachelectomy or simple trachelectomy. One patient with nodal involvement underwent a 3cycle chemotherapy followed by concurrent radiochemotherapy. Hematologic toxicity grade 3 was observed in one patient leading to a change of chemotherapy. Two patients showed complete disappearance of tumor and two a partial response to neoadjuvant treatment. After a mean follow up of 20.5months (14-33), no relapse was observed. To date, no pregnancy was obtained. CONCLUSION Lymph node staging followed by neoadjuvant chemotherapy and radical trachelectomy seems to be a promising treatment scheme for patients with cervical tumors IB1>2cm pN0 seeking parenthood.
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Affiliation(s)
| | - Delphine Hequet
- Hôpital, institut Curie, département de chirurgie, 5248 Paris, France
| | - Coraline Dubot
- Hôpital, institut Curie, département d'oncologie médicale, 5248 Paris, France
| | | | | | - Véronique Becette
- Hôpital, institut Curie, département d'anatomopathologie, 5248 Paris, France
| | - Roman Rouzier
- Hôpital, institut Curie, département de chirurgie, 5248 Paris, France
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Estevez JP, Ascencio M, Colin P, Farine MO, Collinet P, Mordon S. Continuous or fractionated photodynamic therapy? Comparison of three PDT schemes for ovarian peritoneal micrometastasis treatment in a rat model. Photodiagnosis Photodyn Ther 2010; 7:251-7. [PMID: 21112548 DOI: 10.1016/j.pdpdt.2010.07.007] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2010] [Revised: 07/19/2010] [Accepted: 07/21/2010] [Indexed: 11/25/2022]
Abstract
OBJECTIVE This experimental study aimed to compare three illumination schemes to optimize hexaminolaevulinate (HAL)-PDT in a rat tumor model with advanced ovarian cancer. MATERIALS AND METHODS Peritoneal carcinomatosis was induced by intraperitoneal 5×10(6)NuTu-19 cells injection in 60 female rats Fisher 344. Carcinomatosis was obtained 50 days post-tumor induction. Four hours post-intraperitoneal HAL (Photocure ASA, Oslo, Norway) injection, three different schemes of PDT were performed during 25 min on a 1cm(2) area. (A) Fractionated illumination (n=20) with an on-off cycle ("on": 2 min and "off": 1 min) at 30mW cm(-2) until a fluence of 30J cm(-2), (B) continuous illumination (n=20) at 30mW cm(-2) with a fluence of (45J cm(-2)C) continuous illumination (n=20) at 20mW cm(-2) with a fluence of 30J cm(-2). Laser light was generated using a 532nm KTP laser (Laser Quantum, Stockport, UK). Biopsies were taken 24h after treatment. Quantitative histology was performed. Necrosis value was determined: 0-no necrosis to 4-full necrosis. Depth of necrosis was then measured for each sample and correlated to Necrosis value. RESULTS HAL-PDT was efficient in producing necrosis irrespective of the scheme. Tumor destruction was superior with fractionated illumination compared to both continuous illumination schemes regarding to the depth of necrosis (213±113μm vs 154±133μm vs 171±155μm) (p<0.05) or to the full necrosis rate (50% vs 30% vs 10%) (p<0.0001). CONCLUSION Fractionated illumination during photodynamic therapy (PDT) was shown to improve tumor response. Fractionated illumination with short intervals should be considered for an effective PDT of advanced ovarian cancer.
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Affiliation(s)
- Juan Pablo Estevez
- INSERM, U 703 - Univ. de Lille Nord de France - Lille University Hospital - CHRU, Lille, France
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Ascencio M, Estevez JP, Delemer M, Farine MO, Collinet P, Mordon S. Comparison of continuous and fractionated illumination during hexaminolaevulinate-photodynamic therapy. Photodiagnosis Photodyn Ther 2008; 5:210-6. [DOI: 10.1016/j.pdpdt.2008.09.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2008] [Revised: 09/23/2008] [Accepted: 09/24/2008] [Indexed: 11/27/2022]
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