Poster Session 1 – Wednesday, December 9, 2020: 8:00 AM CT
   
  Axillary Nodes, Surgery
PS1-01 Combined analysis of the WORTH 1 and WORTH 2 studies of ipsilateral breast tumor recurrence after breast conservative surgery without radiotherapyusing the “5-mm thick slice and 5-mm free margin method”
Masuda N, Ohsumi S, Nishimura R, Akashi-Tanaka S, Suemasu K, Yamauchi H, Tokunaga E, Ikeda T, Nishi T, Hayashi H, Iino Y, Takatsuka Y, Hideo Inaji H. National Hospital Organization Osaka National Hospital, Osaka, Japan; National Hospital Organization Shikoku Cancer Center, Matsuyama, Japan; Kumamoto Shinto General Hospital, Kumamoto, Japan; Show University School of Medicine, Tokyo, Japan; ARCHE clinic, Saitama, Japan; St. Luke’s International Hospital, Tokyo, Japan; National Hospital Organization Kyushu Cancer Center, Fukuoka, Japan; Kitasato University Kitasato Institute Hospital, Tokyo, Japan; Toda Chuo Health Exam Center, Toda, Japan; National Hospital Organization Kanmon Medical Center, Shimonoseki, Japan; Kusunoki Hospital, Fujioka, Japan; Kansai Rosai Hospital, Amagasaki, Japan; Kaizuka City Hospital, Kaizuka, Japan.
   
  Radiation Therapy
PS1-02 Withdrawn
PS1-03 Active surveillance for DCIS: clinical outcomes at 5.6 years mean follow-up
Brabham C, Mukhtar R, Liang A, Kim P, Hirst G, Basu A, Greenwood H, Freimanis R, Borowsky A, Hwang S, Baehner R, Krings G, Hylton N, Esserman L. University of California, San Francisco, San Francisco, CA; Frank H Netter MD School of Medicine, Quinnipiac, CT; University of California, Davis, Sacramento, CA; Duke University, Durham, NC.
   
  Axillary Nodes, Surgery
PS1-04 Utility of rapid- immunohistochemistry using an alternating current electric field for intraoperative diagnosis of sentinel lymph nodes in breast cancer
Terata K, Nanjo H, Takahashi E, Nakamura R, Akagami Y, Yamaguchi A, Yatsuyanagi M, Kudo C, Minamiya Y. Akita University Hospital, Akita, Japan; Akita Prefectural Research and Development Center, Akita, Japan.
PS1-05 Trends in breast-conserving surgery in Mexico after the implementation of a public health insurance system
Bargalló-Rocha E, Reynoso-Noveron N, Corona J, Esparza-Arias N, Ramírez-Ugalde MT, Robles-Vidal CD, Shaw-Dulin R, Stankov A, Vazquez-Romo R, Villarreal-Colin P, Aguilar-Villanueva S, Hidalgo-Bahena J, Perez-Quintanilla M, Lara-Medina FU, Torres JA, Soto-Perez-de-Celis E, Cabrera-Galeana P, Mohar A, Meneses-García A. Instituto Nacional de Cancerología, Mexico City, Mexico.
   
  Radiation Therapy
PS1-06 High-risk breast cancer in oldest old: exploring the effect of different treatments on outcomes
Al-Rashdan A, Xu Y, Barbera L, Cao J, Cheung W, Bouchard-Fortier A, Quan M. Tom Baker Cancer Centre, Calgary, AB, Canada.
PS1-07 Elderly breast cancer patients benefit from surgery according to guidelines
Mejdahl MK, Christensen MH, Nielsen BP, Tvedskov THF. Herlev and Gentofte University Hospital, Denmark, Copenhagen, Denmark.
PS1-08 Withdrawn
   
  Axillary Nodes, Surgery
PS1-09 Long-term results of Prepectoral Implant-based reconstruction using Braxon®Acellular Dermal Matrix - National audit from United Kingdom
Chandarana M, NarayananS, Parmeshwar R. Royal Victoria Hospital, Kirkcaldy, United Kingdom; University Hospitals of North Mdlands NHS Trust, Stok-on-Trent, United Kingdom; University Hospital of Morecambe Bay, Lancaster, United Kingdom.
PS1-10 Outcomes after sentinel lymph node biopsy and radiation therapy in women over 70 years old with ER+, HER2-, clinically node negative breast cancer
McAuliffe PF, Carleton NM, Zou J, Fang Y, Koscumb SE, Shah O, Chen F, Beriwal S, Diego EJ, Brufsky AM, Oesterreich S, Shapiro SD, Ferris R, Emens LA, Tseng G, Marroquin OC, Lee AV. University of Pittsburgh Medical Center, Pittsburgh, PA.
PS1-11 Natural transition targeted surgery
Kern P, Hoffmann O, Bittner A-K, Kimmig R, Rezai M, Bücker I, Kessel A. Ruhr-University of Bochum & University Hospital of Essen, Bochum & Essen, Germany; University Hospital of Essen, Essen, Germany; Malteser Hospital of Duisburg, Duisburg, Germany; Ruhr-University of Bochum, Bochum, Germany.
   
  Radiation Therapy
PS1-12 Factors associated with chronic breast lymphedema after adjuvant radiation in women undergoing breast conservation therapy
Rama S, Canella C, Luker J, Park K, Barry R, Ghosh S, Zhu S, Chen Y, Bensenhaver J, Walker E, Levin K, Atisha D, Evangelista M. Henry Ford Hospital, Detroit, MI; Wayne State University School of Medicine, Detroit, MI; Michigan State University College of Osteopathic Medicine, East Lansing, MI.
PS1-13 The impact of Corona Virus Disease-2019 on breast services at University Hospitals of North Midlands, United Kingdom
Gowda SM, Kabeer K, Mansour F, Hasan A, Nael E, Gopalan V, Gahir D, Jegannathen A, Marla S, Soumian S, Narayanan S, JafferBhoy S. University Hospitals of North Midlands, Stoke-on-Trent, United Kingdom.
PS1-14 Impact of axillary dissection and patterns of care in patients with ypN1 triple negative breast cancer receiving regional nodal irradiation
Kharouta M, Damico N, Miller M, Harris E, Lyons J. University Hospitals Cleveland Medical Center, Cleveland, OH.
   
  Axillary Nodes, Surgery
PS1-15 Does breast cancer subtype impact margin status in patients undergoing partial mastectomy?
Fenton A, Dupont E, Tsangaris T, Garcia-Cantu C, Howard-McNatt M, Chiba A, Berger A, Levine E, Gass J, Gallagher K, Lum S, Martinez R, Willis A, Pandya S, Brown E, Mendiola A, Murray M, Solomon N, Senthil M, Ollila D, Edmonson D, Lazar M, Namm J, Li F, Butler M, McGowan N, Herrera M, Avitan Y, Yoder B, Walters L, McPartland T, Haddad V, Ma H, Xie M, Chagpar A. Cleveland Clinic Akron General, Akron, OH; Watson Clinic, Lakeland, FL; Thomas Jefferson University, Philadelphia, PA; Doctors Hospital at Renaissance, Edinburg, TX; Wake Forest University, Winston-Salem, NC; Wake Forest University, Winston-Salem, NC, NC; Women and Infants Hospital, Providence, RI; University of North Carolina, Chapel Hill, NC; Loma Linda University, Loma Linda, CA; Beaumont Hospital, Troy, MI; MicroPath Laboratories, Lakeland, FL; Yale University, New Haven, CT.
PS1-16 Ipsilateral breast cancer recurrence: treatment and long-term oncological results at a high volume center
Gentile D, Sagona A, Pasqualina Anghelone CA, Barbieri E, Marrazzo E, Gatzemeier W, Canavese G, Errico V, Testori A, Tinterri C. Humanitas Clinical and Research Center, Rozzano, Milan, Italy.
   
  Radiation Therapy
PS1-17 Comparing survival differences between breast-conserving therapy and mastectomy in patients with early-stage breast cancer undergoing upfront surgery
Yi M, Chavez Mac Gregor M, Smith B, Caudle AS, DeSnyder SM, Kuerer HM, Hunt KK. UT MD Anderson Cancer Center, Houston, TX.
PS1-18 Pregnancy-associated breast cancer: does timing of presentation affect outcome?
Crown A, McCartan D, Curry M, Feldman M, Patil S, Kamer S, Goldfarb SB, Gemignani M. Memorial Sloan Kettering Cancer Center, New York, NY; St Vincent's University Hospital, Dublin, Ireland; Albany Medical Center, Albany, NY.
   
  Axillary Nodes, Surgery
PS1-19 The accuracy of axillary node assessment of ultrasound after neoadjuvant chemotherapy in clinically node positive patients
Lim E, Beeram M, Prawira A, Patnaik A, Wang XA, Young SRL, Smyth LM, Hamilton EP. Garvan Institute of Medical Resarch, Darlinghurst NSW, Australia; START Cancer Center Care, San Antonio, TX; START Cancer Care Center, San Antonio, TX; Eli Lilly and Company, Indianapolis, IN; Sarah Cannon, Nashville, TN.
PS1-20 Pathologic lymph lode status of patients with T1 HER2-positive breast cancer who did not receive neoadjuvant chemotherapy using the National Cancer Database
DeCesare L, Perez C, Nimmagadda N, Zhang Y, Terranella S, Skertich N, Wiegmann A, Madrigrano A, Alvarado R, O'Donoghue C. Rush University Medical Center, Chicago, IL.
PS1-21 Molecular fluorescence-guided surgery using beva800 for the assessment of tumor margins during breast conserving surgery of patients with primary breast cancer (MARGIN-II)
Kolberg H-C, Röhm C, Stachs A, Schütz F, Blohmer J-U, Wetzig S, Hartmann S, Heil J, Hahn M. Marien Hospital Bottrop, Bottrop, Germany; Universitätsklinikum Tübingen, Tübingen, Germany; Universitätsklinikum Rostock, Rostock, Germany; Diakonissen-Stiftungs-Krankenhaus Speyer, Speyer, Germany; Charité - Universitätsmedizin Berlin, Berlin, Germany; Universitätsklinikum Heidelberg, Heidelberg, Germany.
PS1-22 The oncological safety of lipofilling after breast cancer surgery: a meta-analysis
Linden HM, Campone M, Bardia A, Ulaner GA, Gosselin A, Doroumian S, Pelekanou V, Celanovic M, Chandarlapaty S. University of Washington Medical Center, Seattle Cancer Care Alliance, Seattle, WA; Institut de Cancérologie de l'Ouest, René Gauducheau, St Herblain, France; Massachusetts General Hospital Cancer Center, Harvard Medical School, Boston, MA; Memorial Sloan Kettering Cancer Center, New York, NY; Sanofi, Paris, France; Sanofi, Montpellier, France; Sanofi, Cambridge, MA.
PS1-23 Pre-pectoral implant-based reconstruction and adjuvant radiation therapy - Surgical outcomes from a multicentre study in United Kingdom
Chandarana M, Narayanan S, Parmeshwar R. Royal Victoria Hospital, Kirkcaldy, United Kingdom; University Hospitals of North Midlands, Stoke-on-Trent, United Kingdom; University Hospitals of Morecambe Bay, Lancaster, United Kingdom.
PS1-24 Symmetry of breasts following reconstructive surgery
Bui T, Sampathkumar U, Nowroozilarki Z, Liu J, Borders MC, Hanson SE, Reece GP, Markey MK, Merchant FA. University of Houston, Houston, TX; The University of Texas MD Anderson Cancer Center, Houston, TX; The University of Texas at Austin, Austin, TX.
PS1-25 Axillary management after neoadjuvant chemotherapy in initially node positive early breast cancer
Morales Murillo S, Gasol Cudós A, Pallisé Subirats O, Melé Olivé J, Canosa Morales C, Vilardell Villellas F, Sanchez Guzman DR, Veas Rodriguez J, Rodriguez Galindo A. Hospital Arnau de Vilanova de Lleida, LLEIDA, Spain; Hospital Arnau de Vilanova de Lleida, Lleida, Spain.
PS1-26 Sentinel lymph node biopsy alone in locally advanced breast cancer after neoadjuvant chemotherapy: Turkish Multicentric Neosenti-Turk MF-18-02-Study
Cabioglu N, Karanlık H, Muslumanoglu M, Karadeniz Çakmak G, Can Trablus D, Tukenmez M, Ersoy YE, Uras C, Zengel B, Emiroğlu S, Kamalı Polat A, Yeniay L, Ozkurt E, Kara H, Ibis K, Aydiner A, Ozmen V, Igci A. Istanbul University, Istanbul Faculty of Medicine, Department of Surgery, Istanbul, Turkey; Istanbul University, Institute of Oncology, Department of Surgical Oncology, Istanbul, Turkey; Zonguldak Bülent Ecevit University, Department of General Surgery,, Zonguldak, Turkey; İstanbul Samatya Training and Research Hospital, Department of General Surgery, Istanbul, Turkey; Vakıf Guraba Bezmialem Valide Sultan University, Department of General Surgery, Istanbul, Turkey; Acıbadem University, Department of General Surgery, Istanbul, Turkey; The University of Health Sciences, Izmir Bozyaka Education and Training Hospital, Department of General Surgery, İzmir, Turkey; Samsun 19 Mayıs University, Faculty of Medicine, Department of General Surgery, Samsun, Turkey9Ege University, Faculty of Medicine, Department of General Surgery, Izmir, Turkey; Acıbadem University, Department of General Surgery, Istanbul, Turkey; Istanbul University, Institute of Oncology, Department of Radiation Oncology, Istanbul, Turkey.
PS1-27 A novel technology for uniform post-lumpectomy radio-frequency ablation for margin extension and local control tested in IRB-approved pilot mastectomy study
Wanke TR, Kurth T, Bailey A, Rzeszutek Z, Blanco, Jr., L, Bethke K. Northwestern University Feinberg School of Medicine, Chicago, IL; Innoblative Designs Inc., Chicago, IL; Northwestern University Feinberg School of Medicine, Dept. of Pathology, Chicago, IL; Northwestern University Feinberg School of Medicine, Dept. of Surgery, Chicago, IL.
PS1-28 A novel MRI based predictive index can identify patients suitable for preservation of the nipple-areola complex in breast reconstructive surgery
Seki H, Sakurai T, Ishiguro Y, Kanno M, Shimizu K. Saitama Medical Center, Saitama, Japan.
PS1-29 Predicting axillary pathologic response to neoadjuvant chemotherapy for node-positive breast cancer: clinical predictive model by using MRI and ultrasound
Matsumoto A, Yamada M, Tsukahara D, Umemoto Y, Jinno H. Teikyo University School of Medicine, Tokyo, Japan.
PS1-30 A prospective phase II trial to evaluate the feasibility of omit sentinel lymph node biopsy after integrate18F-FDG dedicated Axillary PET in early breast cancer: SOAPET trial
Li J, Cheng J, Liu G, Hou Y, Di G, Yang B, Jiang Y, Huang L, Chen S, Wang Y, Yu K, Shao Z. Shanghai Cancer Center, Shanghai, China.
PS1-31 Nomogram for predicting axillary lymph node pathological response in node-positive breast cancer patients after neoadjuvant chemotherapy
Wang X, Wang W, Liu J, Meng X, Liu J, Guo C, Song Y, Cui N, Li Q, Xing Z, Wang J, Zhang M, Feng K, Wang P, Wang X. Department of Breast Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer /Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Breast surgery, Beijing Tiantan Hospital, Capital Medical University, Beijing, China; Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Radiology, National Cancer Center/National Clinical Research Center for Cancer /Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Ultrasound, National Cancer Center/National Clinical Research Center for Cancer /Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China; Department of Medical Oncology, National Cancer Center/National Clinical Research Center for Cancer /Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
PS1-32 A multicentre prospective feasibility study of carbon dye tattooing of biopsied axillary node and surgical localisation in breast cancer patients
Goyal A, Puri S, Marshall A, Valassiadou K, Hoosein M, Carmichael AR, Erdelyi G, Sharma N, Dunn J, York J. Royal Derby Hospital, Derby, United Kingdom; University of Warwick, Warwick, United Kingdom; Glenfield Hospital, Leicester, United Kingdom; St James's University Hospital, Leeds, United Kingdom.
PS1-33 Molecular subtype and clinical stage influenced axillary lymph node response in breast cancer patients with breast pathological complete remission after neoadjuvant therapy
Hong J, Tong Y, Huang O, Wu J, Zhu L, He J, Chen W, Li Y, Fei X, Chen X, Shen K. Department of General Surgery, Comprehensive Breast Health Center, Ruijin Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China; Department of Pathology, Ruijin Hospital affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China.
PS1-34 Oncological safety and patient journey with Magseed™ localised breast conserving surgery
Kabeer KK, Gowda MS, MohdIsa Z, Thomas M, Gopalan V, Jafferbhoy S, Soumian S, Narayanan S, Kirby R, Marla S. University Hospitals of North Midlands, Stoke on Trent, United Kingdom.
   
  Radiation Therapy
PS1-35 Combined primary site resection and metastasectomy in patients with metastatic breast cancer
Bilani N, Elson L, Liang H, Elimimian E, Nahleh Z. Cleveland Clinic Florida, Weston, FL.
PS1-36 Outcomes and management of positive and close anterior margins following skin-sparing mastectomy
Wignarajah P, Dumitru D, Benson JR. Cambridge Breast Unit, Addenbrookes Hospital, Cambridge, United Kingdom.
   
  Axillary Nodes, Surgery
PS1-37 Reduction mammoplasty in the setting of neoadjuvant chemotherapy
Hewitt K, Wu S, Barnes L, Yang J, Piper M. University of California, San Francisco, San Francisco, CA.
PS1-38 Role of MR spectroscopy in evaluation of axilla in breast cancer
Vuthaluru S, Srivastava A. All India Institute of Medical Sciences, New Delhi, India.
PS1-39 Evaluation of novel diagnostic kits using the semi-dry dot-blot method combined with an automatic reader for detecting metastases in lymph nodes of patients with breast cancer : A single-center prospective study
Otsubo R, Yano H, Matsumoto M, Tanaka A, Fukushima A, Kuba S, Morita M, Uno N, Yoon H-S, Yanagihara K, Eguchi S, Nagayasu T. Nagasaki University Hospital, Nagasaki, Japan.
PS1-40 Can sentinel lymph node biopsy be avoided in patients of breast cancer with normal preoperative ultrasound of axilla
Adil A, Seenu V, Al Qassabi B, Alsaadi HN, Al-abadi SA, Vuthaluru S, Chan M-F,Al Ajmi R. Sultan Qaboos University, Muscat, Oman.
   
  Radiation Therapy
PS1-41 Does complete surgical removal of metastases in oligometastatic breast cancer improve survival? A matched-pair analysis of the AGMT_MBC-registry
Gampenrieder SP, Rinnerthaler G, Tinchon C, Petzer AL, Suppan C, Heib S, Voskova D, Zabernigg AF, Egle D, Sandholzer M, Singer CF, Roitner F, Andel J, Hubalek M, Knauer M, Greil R. Department of Internal Medicine III , Cancer Research Institute - Laboratory for Immunological and Molecular Cancer Research (SCRI-LIMCR), Paracelsus Medical University Salzburg, Salzburg, Austria; LKH Hochsteiermark – Leoben, Department of Haemato-Oncology, Leoben, Austria; Internal Medicine I: Hematology with Stem Cell Transplantation, Hemostaseology and Medical Oncology, Ordensklinikum Linz, Linz, Austria; Medical University of Graz, Department of Internal Medicine, Clinical Division of Oncology, Graz, Austria; Department of Internal Medicine IV, Klinikum Wels-Grieskirchen, Wels, Austria; Department of Hematology and Internal Oncology, Kepler Universitätsklinikum GmbH, Linz, Austria; Department of Internal Medicine, Hospital Kufstein, Kufstein, Austria; Department of Gynaecology, Medical University Innsbruck, Innsbruck, Austria; Department of Internal Medicine II, Academic Teaching Hospital Feldkirch, Felkirch, Austria; Department of Obstetrics and Gynecology and Comprehensive Cancer Center, Medical University of Vienna, Vienna, Austria; Department of Internal Medicine II, Hospital Braunau, Braunau, Austria; Internal Medicine 2, Pyhrn-Eisenwurzen Hospital Steyr, Steyr, Austria; Department of Gynecology, Breast Health Center Schwaz, Schwaz, Austria; Breast Center Eastern Switzerland, St. Gallen, St. Gallen, Switzerland.
PS1-42 Locoregional treatment in de novo metastatic breast cancer: an overview of the current evidence
Chongxi R. Cangzhou Clinical College, Cangzhou, China.
   
  Axillary Nodes, Surgery
PS1-43 Axillary surgery after neoadjuvant chemotherapy in patients treated for an operable breast cancer with a proven initially positive axillary node: preliminary results of identification and removal of the initially positive axillary node
Renaudeau C, Rouzier R, Gimbergues P, Gutowski M, Jouve E, Rauch P, Coutant C, Faure C, Uzan C, Dupré P-F, Ceccato V, N'go C, Reynard A, Doutriaux I, Campion L, Classe J-M. Institut de Cancerologie de l'Ouest, Saint Herblain, France; Institut Curie, Saint Cloud, France; Centre jean Perrin, Clermond Ferrant, France; Centre Val D'Aurelle, Montpellier, France; InstitutUniversitaire de Cancerologie de Toulouse, Toulouse, France; Institut de Cancerologie de Lorraine, Nancy, France; Centre georges François Leclerc, Dijon, France; Centre Leon Berard, Luon, France; Hopital Pitiè Salpétrière, Paris, France; CHU Brest, Brest, France; Centre Godinot, Reims, France; Centre Hospitalier Europeen Georges Pompidou, Paris, France; Institut de Cancerologie de l'Ouest, Angers, France.
PS1-44 Impact of a standardized protocol for management of axilla after neoadjuvant chemotherapy in breast cancer patients at a cancer center
de Paula Canal M, Rocha C, Sonagli M, Bitencourt A, Sanches S, Tavares M, Osório C, Makdissi FB. ACCAMARGO Cancer Center, Sao Paulo, Brazil.
PS1-45 Surgical management of the axilla in breast cancer in Latin american countries: surgeon´s conduct
Esparza-Arias N, Bargallo-Rocha JE, del Real-Ordoñez S, Pacheco-Vallejo Y, Navarro-Santiesteban S, Salazar-Alvarez MA, Vasquez-Cordoba RE, Girón-Orellana KA, Guerrero-Mogrovejo JC, Alvarez CE. National Cancer Institute Mexico, Asociación Mexicana de Mastología, Sociedad de Oncología Quirúrgica de México, Mexico City, Mexico; National Cancer Institute Mexico, Asociación Mexicana de Mastología, Federación Latino Americana de Mastología, The Best Of SSO Mexico, Mexico City, Mexico; Asociación Mexicana de Mastología, Christus Muguerza Hospital, Saltillo Coahuila México, Mexico; Colegio Mexicano de Ginecólogos Oncólogos, Hospital Ángeles, Querétaro México, Mexico; Clínica de la Mujer Hospital General Agustín O´Horan, Yucatán México, Mexico; Asociación Nicaragüense de Oncología Cirugía oncológica, Hospital Militar Escuela Alejandro Dávila Bolaños, Nicaragua, Nicaragua; Asociación Salvadoreña de Oncología, Instituto Salvadoreño del Seguro Social, El Salvador, El Salvador; Asociación de Ginecología y Obstetricia de Guatemala, Asociación de Cirujanos de Guatemala, Guatemala, Guatemala; Instituto Ecuatoriano de Seguridad Social, Ecuador, Ecuador; Clinica Foscal, Asociación Colombiana de Mastologia, Bucaramanga, Colombia.
PS1-46 Magnetic seeds to aid targeted axillary dissection
Harborough KE, Sinnett V, Downey K, Krupa K, Rusby JE, Barry PA. The Royal Marsden NHS Foundation Trust, London, United Kingdom.
PS1-47 Local recurrence and aesthetic outcome following conventional breast conserving surgery and oncoplastic breast surgery: A randomized controlled trial
Seenu V, Choudhary D, Saha S, Vuthaluru S, Srivastava A. All India Institute of Medical Sciences, Delhi, India.
   
  Radiation Therapy
PS1-48 Factors influencing choice of contralateral prophylactic mastectomy in patients with unilateral breast cancer
Benson J, Kyriacou H, Giono I, Dumitru D. Cambridge University NHS Hospitals Foundation Trust, Cambridge, United Kingdom.
PS1-49 The effect of oncoplastic reduction on the incidence of post-operative breast lymphedema in breast cancer patients undergoing lumpectomy
Luker JN, Canella C, Rama S, Park K, Barry R, Ghosh S, Zhu S, Chen Y, Bensenhaver J, Walker E, Levin K, Evangelista M, Atisha D. Henry Ford Health System, Detroit, MI; Wayne State University School of Medicine, Detroit, MI; Michigan State University College of Osteopathic Medicine, East Lansing, MI.
PS1-50 Locoregional therapy in de novo metastatic breast cancer: systemic review and meta-analysis
Reinhorn DJ, Mutai R, Yerushalmi R, Moore A, Amir E, Goldvaser H. Davidoff Cancer Center, Rabin Medical Center, Petach Tikva, Israel; Princess Margaret Cancer Centre, University of Toronto, Toronto, ON, Canada.
   
  Axillary Nodes, Surgery
PS1-51 A nomogram for predicting three or more axillary lymph node involvement before breast cancer surgery
Kang Y-J. Incheon St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Incheon, Republic of Korea.
PS1-52 A prospective comparison of skin staining after sentinel lymph node biopsy, using blue ink (PB) and superparamagnetic iron oxide nanoparticles (SPIO) tracers
Warnberg M, Karakatsanis A, Nilsson F, Obondo C, Pistiolis L, Mohammad I, Dussan Luberth C, Eriksson S, Hersi A-F,9 Wärnberg F. Breast Center, Sahlgrenska University Hospital, Gothenburg, Sweden; Department of Surgical Sciences, Uppsala University, Uppsala, Sweden; Department of Surgery and Perioperative Sciences, Umeå University, Umeå, Sweden; Department of Surgery, University Hospital Wishaw, Glascow, United Kingdom; Department of Surgery, Institute of Clinical Sciences, Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden; Department of Surgery, Växjö Hospital, Växjö, Sweden; Dept. of Surgery, Linköping University Hospital, Linköping, Sweden; Centre for Clinical Research, Uppsala University, Department of Surgery, Västmanland County Hospital, Västerås, Sweden; Department of Surgery, Västmanland County Hospital, Centre for Clinical Research, Uppsala University, Västerås, Sweden.
PS1-53 Does the axilla surgical management for limited sentinel lymph nodes involvement vary between total mastectomy and breast-conserving surgery
Gao W, Chen x, Shen K. Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China.
PS1-54 Risk factors for lymph node metastasis and the role of SLNB in microinvasive breast cancer
Paik PS, Cho MK, Ahn J, Yoon CI, Yoo, T-K, Park W-C. Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Republic of Korea.
PS1-55 Clipping of involved axillary lymph nodes before Neo adjuvant chemotherapy may improve in identification rates & staging of axilla in breast cancer
Elahi MB, Bichoo RA, Grover K, Khalifa E, Ihsan NB, Kneeshaw PJ, Wooler BP, Dumitru D, Roychaudhury R, Rahman A, Mahapatra TK. Hull University Teaching Hospital NHS TRUST, Cottingham, United Kingdom.
PS1-56 Randomized controlled trial comparing effect of 1 cm versus 2 cm macroscopic resection margin on oncologic & aesthetic outcomes in women with early breast cancer
Maitra D, Dhar A, Kataria K, Ranjan P, Hari S, Mathur S, Haresh KP, Srivastava A. All India Institute of Medical Sciences, New Delhi, India.
PS1-57 Mastectomy versus breast conserving surgery for the management of locally advanced breast cancer
Arora R, Kazemi G, Lucas G. McMaster University, Hamilton, ON, Canada.
   
  Radiation Therapy
PS1-58 The role of resection of the primary tumour in patients with de novo oligometastatic breast cancer (OMBC)
Debuquoy C, Regis C, Wallet J, Pasquier D, Penel N, Le Deley M-C, Chauvet M-P, Kaczmarek E. Centre Oscar Lambret, Lille, France.
PS1-59 Skin and nipple sparing mastectomies - oncologic outcomes from an oncologic center
Costeira B, da Silva FB, Oom R, Costa C, Vargas Moniz J, Serra Alves R, Abecasis N, Rodrigues Santos C. IPO Lisboa, Lisbon, Portugal.
   
  Axillary Nodes, Surgery
PS1-60 Is immediate breast reconstruction safe in post neoadjuvant chemotherapy patients? A single centre audit
Mansour F, Meilak J, Kabeer K, Gowda M, Jafferbhoy S, Marla S, Gopalan V, Narayanan S, Soumian S. Royal Stoke University Hospital, Stoke on Trent, United Kingdom.
PS1-61 Clinical and patient reported outcomes in oncoplastic breast conservation surgery from a single surgeon's practice in a busy community hospital in Canada
DiPasquale A, Prus-Czarnecka Z, Delmar L, and Peiris L. University of Alberta, Edmonton, AB, Canada.