<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Bone and soft tissue sarcomas, tumors of the skin</journal-id><journal-title-group><journal-title xml:lang="en">Bone and soft tissue sarcomas, tumors of the skin</journal-title><trans-title-group xml:lang="ru"><trans-title>Саркомы костей, мягких тканей и опухоли кожи</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2219-4614</issn><issn publication-format="electronic">2782-3687</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">115</article-id><article-id pub-id-type="doi">10.17650/2070-9781-2021-13-2-18-25</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>SOFT TISSUE SARCOMAS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>САРКОМЫ МЯГКИХ ТКАНЕЙ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Modern approach to the treatment of sacrococcygeal chordomas</article-title><trans-title-group xml:lang="ru"><trans-title>Современный подход к лечению хордом крестцово-копчиковой области</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1395-5132</contrib-id><name-alternatives><name xml:lang="en"><surname>Babkin</surname><given-names>N. S.</given-names></name><name xml:lang="ru"><surname>Бабкин</surname><given-names>Н. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115478, Russia</p></bio><bio xml:lang="ru"><p>Никита Сергеевич Бабкин, Россия, 115478 Москва, Каширское шоссе, д. 24</p></bio><email>niksn0072@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1241-3019</contrib-id><name-alternatives><name xml:lang="en"><surname>Musaev</surname><given-names>E. R.</given-names></name><name xml:lang="ru"><surname>Мусаев</surname><given-names>Э. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>27, Istra Village, Stepanovskoe, Krasnogorskiy Dst., Moscow Region 143423, Russia</p></bio><bio xml:lang="ru"><p>Россия, 143423 Московская обл., Красногорский р-н, п/о Степановское, пос. Истра, 27</p></bio><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7592-4249</contrib-id><name-alternatives><name xml:lang="en"><surname>Bulycheva</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Булычева</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115478, Russia</p></bio><bio xml:lang="ru"><p>Россия, 115478 Москва, Каширское шоссе, д. 24</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9557-3685</contrib-id><name-alternatives><name xml:lang="en"><surname>Sofronov</surname><given-names>D. I.</given-names></name><name xml:lang="ru"><surname>Софронов</surname><given-names>Д. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115478, Russia</p></bio><bio xml:lang="ru"><p>Россия, 115478 Москва, Каширское шоссе, д. 24</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shchipakhin</surname><given-names>S. A.</given-names></name><name xml:lang="ru"><surname>Щипахин</surname><given-names>С. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115478, Russia</p></bio><bio xml:lang="ru"><p>Россия, 115478 Москва, Каширское шоссе, д. 24</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9019-8369</contrib-id><name-alternatives><name xml:lang="en"><surname>Galustov</surname><given-names>A. M.</given-names></name><name xml:lang="ru"><surname>Галустов</surname><given-names>А. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>24 Kashirskoe Shosse, Moscow 115478, Russia</p></bio><bio xml:lang="ru"><p>Россия, 115478 Москва, Каширское шоссе, д. 24</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology оf the Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow Cancer Hospital No 62, Moscow Healthcare Department</institution></aff><aff><institution xml:lang="ru">ГБУЗ «Московская городская онкологическая больница № 62 здравоохранения г. Москвы»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-08-28" publication-format="electronic"><day>28</day><month>08</month><year>2021</year></pub-date><volume>13</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>18</fpage><lpage>25</lpage><history><date date-type="received" iso-8601-date="2021-08-28"><day>28</day><month>08</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-08-28"><day>28</day><month>08</month><year>2021</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2021, Babkin N.S., Musaev E.R., Bulycheva I.V., Sofronov D.I., Shchipakhin S.A., Galustov A.M.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2021, Бабкин Н.С., Мусаев Э.Р., Булычева И.В., Софронов Д.И., Щипахин С.А., Галустов А.М.</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="en">Babkin N.S., Musaev E.R., Bulycheva I.V., Sofronov D.I., Shchipakhin S.A., Galustov A.M.</copyright-holder><copyright-holder xml:lang="ru">Бабкин Н.С., Мусаев Э.Р., Булычева И.В., Софронов Д.И., Щипахин С.А., Галустов А.М.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://sarbon.abvpress.ru/jour/article/view/115">https://sarbon.abvpress.ru/jour/article/view/115</self-uri><abstract xml:lang="en"><p>Chordomas of the sacrococcygeal region account for more than 50 % of all sacral tumors. These malignant neoplasms grow slowly and are asymptomatic for a long time. As a result, chordomas often reach large sizes and affect the neurovascular structures of the sacrum and pelvic organs. The use of en-bloc resection allows to increase survival rates and reduce the risk of progression. However, this method of chord treatment is difficult for surgeons and in most cases, after surgery, the quality of life of patients decreases. The improvement of imaging methods, the success of oncological orthopedics and radiation therapy allow performing radical organ-preserving operations. In this article, we will consider the modern concept of treatment with a sacrococcygeal chord.</p></abstract><trans-abstract xml:lang="ru"><p>Хордомы крестцово-копчиковой области составляют более 50 % всех опухолей крестца. Данные злокачественные новообразования медленно растут и долгое время протекают бессимптомно. Вследствие этого хордомы часто достигают больших размеров и поражают сосудисто-нервные структуры крестца и органы малого таза. Использование en-bloc-резекции позволяет повысить показатели выживаемости и снизить риск прогрессирования. Однако этот метод лечения хордом представляет трудность для хирургов, и в большинстве случаев после хирургического вмешательства качество жизни пациентов снижается. Совершенствование методов визуализации, успехи онкологической ортопедии и лучевой терапии позволяют выполнять радикальные органосохраняющие операции. В этой статье мы рассмотрим современную концепцию лечения хордом крестцово-копчиковой области.</p></trans-abstract><kwd-group xml:lang="en"><kwd>sacral tumors</kwd><kwd>malignant tumors</kwd><kwd>chordoma</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>опухоли крестца</kwd><kwd>злокачественные опухоли</kwd><kwd>хордома</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Alan O., Telli T.A., Ercelep O. et al. Chordoma: a case series and review of the literature. J Med Case Rep 2018;12(1):239. DOI: 10.1186/s13256-018-1784-y.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Stiller C.A., Stiller C.A., Trama A. et al. Descriptive epidemiology of sarcomas in Europe: report from the RARECARE project. Eur J Cancer 2013;49(3):684–95. DOI: 10.1016/j.ejca.2012.09.011.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Walcott B.P., Nahed B.V., Mohyeldin A. et al. Chordoma: current concepts, management, and future directions. Lancet Oncol 2012;13(2):e69–e76. DOI: 10.1016/S1470-2045(11)70337-0.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Stacchiotti S., Sommer J. Building a global consensus approach to chordoma: a position paper from the medical and patient community. Lancet Oncol 2015;16(2):e71–e83с. DOI: 10.1016/S1470-2045(14)71190-8.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Catton C., O’Sullivan B., Bell R. et al. Chordoma: long-term follow-up after radical photon irradiation. Radiother Oncol 1996;41(1):67–72. DOI: 10.1016/s0167-8140(96)91805-8.</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Chambers P.W., Schwinn C P. Chordoma. A clinicopathologic study of metastasis. Am J Clin Pathol 1979;72(5):765–76. DOI: 10.1093/ajcp/72.5.765.</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Higinbotham N.L., Phillips R.F., Farr H.W., Hustu H.O. Chordoma.thirty-five-year study at memorial hospital. Cancer 1967;20(11):1841–50. DOI: 10.1002/1097-0142(196711)20:11&lt;1841::aid-cncr2820201107&gt;3.0.co;2-2.</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Garofalo F., di Summa P.G., Christoforidis D. et al. Multidisciplinary approach of lumbo-sacral chordoma: from oncological treatment to reconstructive surgery. J Surg Oncol 2015;112(5):544–54. DOI: 10.1002/jso.24026.</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Ropper A.E., Cahill K.S., Hanna J.W. et al. Primary vertebral tumors. Neurosurgery 2012;70(1):211–9. DOI: 10.1227/NEU.0b013e31822d5f17.</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Samson I.R., Springfield D.S., Suit H.D. et al. Operative treatment of sacrococcygeal chordoma. A review of twenty-one cases. J Bone Jt Surg 1993;75(10):1476–84. DOI: 10.2106/00004623-199310000-00008.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Pandey S. Review of Sacrococcygeal chordoma. Available by: http://www.cmc.edu.np/images/gallery/Review%20Article/Y1PojeCQtQreview_article_sacrococygeal.pdf.</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Farsad K., Kattapuram S.V., Sacknoff R. et al. Best cases from AFIP sacral chordoma. Radiographics 2009;29(5):1525–30. DOI: 10.1148/rg.295085215.</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Bergh P., Kindblom L.-G., Gunterberg B. et al. Prognostic factors in chordoma of the sacrum and mobile spine: a study of 39 patients. Cancer 2000;88(9):2122–34. DOI: 10.1002/(sici)1097-0142(20000501)88:9&lt;2122::aidcncr19&gt;3.0.co;2-1.</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Ishii K., Chiba K., Watanabe M. et al. Local recurrence after S2–3 sacrectomy in sacral chordoma. J Neurosurg Spine 2009;97(1):98–101. DOI: 10.3171/spi.2002.97.1.0098.</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Ozaki T., Hillmann A., Winkelmann W. Surgical treatment of sacrococcygeal chordoma. J Surg Oncol 1997;64(4):274–9. DOI: 10.1002/(sici)1096-9098(199704)64:4&lt;274::aid-jso5&gt;3.0.co;2-6.</mixed-citation></ref><ref id="B16"><label>16.</label><mixed-citation>Gray S.W., Singhabhandhu B., Smith R.A., Skandalakis J.E. Sacrococcygeal chordoma: report of a case and review of the literature. Surgery 1975;78(5):573–82.</mixed-citation></ref><ref id="B17"><label>17.</label><mixed-citation>Kayani B., Hanna S.A., Sewell M.D. A review of the surgical management of sacral chordoma. Eur J Surg Oncol 2014;40(11):1412–20. DOI: 10.1016/j.ejso.2014.04.008.</mixed-citation></ref><ref id="B18"><label>18.</label><mixed-citation>Fenerty K.E., Folio L.R., Patronas N.J. et al. Predicting clinical outcomes in chordoma patients receiving immunotherapy: a comparison between volumetric segmentation and RECIST. BMC Cancer 2016;16(1):672. DOI: 10.1186/s12885-016-2699-x.</mixed-citation></ref><ref id="B19"><label>19.</label><mixed-citation>Gerber S., Ollivier L., Leclère J. et al. Imaging of sacral tumours. Skeletal Radiol 2008;37(4):277–89. DOI: 10.1007/s00256-007-0413-4.</mixed-citation></ref><ref id="B20"><label>20.</label><mixed-citation>Schwab J.H., Boland P.J., Agaram N.P. et al. Chordoma and chondrosarcoma gene profile: Implications for immunotherapy. Cancer Immunol Immunother 2009;58(3):339–49. DOI: 10.1007/s00262-008-0557-7.</mixed-citation></ref><ref id="B21"><label>21.</label><mixed-citation>Murpbey M.D., Andrews C.L., Flemming D.J. et al. From the archives of the AFIP: primary tumors of the spine: radiologic-pathologic correlation. Radiographics 1996;16(5):1131–58. DOI: 10.1148/radiographics.16.5.8888395.</mixed-citation></ref><ref id="B22"><label>22.</label><mixed-citation>Plathow C., Weber M.A., Debus J. et al. Bildgebende diagnostik bei chordomen des beckens: vergleich der modalitäten CT und MRT. Radiologe 2005;45(1):63–8. DOI: 10.1007/s00117-003-1002-8.</mixed-citation></ref><ref id="B23"><label>23.</label><mixed-citation>Stacchiotti S., Gronchi A., Fossati P. et al. Best practices for the management of local-regional recurrent chordoma: a position paper by the Chordoma Global Consensus Group. Ann Oncol 2017;28(6):1230–42. DOI: 10.1093/annonc/mdx054.</mixed-citation></ref><ref id="B24"><label>24.</label><mixed-citation>Pasalic D., Luetmer P.H., Hunt C.H. et al. Benign notochordal cell tumor of the sacrum with atypical imaging features: the value of ct guided biopsy for diagnosis. Open Neuroimag J 2013;30(7):36–40. DOI: 10.2174/1874440001307010036.</mixed-citation></ref><ref id="B25"><label>25.</label><mixed-citation>Reddy P. Diagnostic histopathology of tumours. Med J Armed Forces India 1996;52(3):209. DOI: 10.1016/S0377-1237(17)30830-4.</mixed-citation></ref><ref id="B26"><label>26.</label><mixed-citation>Crapanzano J.P., Ali S.Z., Ginsberg M.S., Zakowski M.F. Chordoma: a cytologic study with histologic and radiologic correlation. Cancer 2001;93(1):40–51.</mixed-citation></ref><ref id="B27"><label>27.</label><mixed-citation>Pallini R., Maira G., Pierconti F. et al. Chordoma of the skull base: Predictors of tumor recurrence. J Neurosurg 2003;98(4):812–22. DOI: 10.3171/jns.2003.98.4.0812.</mixed-citation></ref><ref id="B28"><label>28.</label><mixed-citation>Atalar H., Selek H., Yıldız Y. et al. Management of sacrococcygeal chordomas Int Orthop 2006;30(6):514–8. DOI: 10.1007/s00264-006-0095-x.</mixed-citation></ref><ref id="B29"><label>29.</label><mixed-citation>Fuchs B., Dickey I.D., Yaszemski M.J. et al. Operative management of sacral chordoma. J Bone Joint Surg Am 2005;87(10):2211–6. DOI: 10.2106/JBJS.D.02693.</mixed-citation></ref><ref id="B30"><label>30.</label><mixed-citation>Woodfield J.C., Chalmers A.G., Phillips N., Sagar P.M. Algorithms for the surgical management of retrorectal tumours. Br J Surg 2008;95(2):214–21. DOI: 10.1002/bjs.5931.</mixed-citation></ref><ref id="B31"><label>31.</label><mixed-citation>Chen Y.L., Liebsch N., Kobayashi W. et al. Definitive high-dose photon/proton radiotherapy for unresected mobile spine and sacral chordomas. Spine (Phila. Pa. 1976) 2013;38(15):E930–6. DOI: 10.1097/BRS.0b013e318296e7d7.</mixed-citation></ref><ref id="B32"><label>32.</label><mixed-citation>Devin C., Chong P.Y., Holt G.E. et al. Leveladjusted perioperative risk of sacral amputations. J Surg Oncol 2006;94(3):203–11. DOI: 10.1002/jso.20477.</mixed-citation></ref><ref id="B33"><label>33.</label><mixed-citation>Imai R., Kamada T., Sugahara S., Tsujii H. Carbon ion radiotherapy for sacral chordoma. Br J Radiol 2011;84(1):S48–54. DOI: 10.1259/bjr/13783281.</mixed-citation></ref><ref id="B34"><label>34.</label><mixed-citation>Smith J., Ludwig R.L., Marcove R.C. Sacrococcygeal chordoma: a clinicoradiological study of 60 patients. Skeletal Radiol 1987;16(1):37–44. DOI: 10.1007/BF00349926.</mixed-citation></ref><ref id="B35"><label>35.</label><mixed-citation>Radaelli S., Stacchiotti S., Ruggieri P. et al. Sacral chordoma: long-term outcome of a large series of patients surgically treated at two reference centers. Spine (Phila. Pa. 1976) 2016;1(12):1049–57. DOI: 10.1097/BRS.0000000000001604.</mixed-citation></ref><ref id="B36"><label>36.</label><mixed-citation>Ruggieri P., Angelini A., Ussia G. et al. Surgical margins and local control in resection of sacral chordomas. Clin Orthop Relat Res 2010;468(1):2939–47. DOI: 10.1007/s11999-010-1472-8.</mixed-citation></ref><ref id="B37"><label>37.</label><mixed-citation>Xie C., Whalley N., Adasonla K. et al. Can local recurrence of a sacral chordoma be treated by further surgery? Bone Jt J 2015;97-B(5):711–5. DOI: 10.1302/0301-620X.97B5.35131.</mixed-citation></ref><ref id="B38"><label>38.</label><mixed-citation>Baratti D., Gronchi A., Pennacchioli E. et al. Chordoma: natural history and results in 28 patients treated at a single institution Ann Surg Oncol 2003;10(3):291–6. DOI: 10.1245/aso.2003.06.002.</mixed-citation></ref><ref id="B39"><label>39.</label><mixed-citation>Wulfften O.D.R. van, Tromp I., Ferreira A. et al. Sacral chordoma: a clinical review of 101 cases with 30-year experience in a single institution. Spine J 2019;19(5):869–79. DOI: 10.1016/j.spinee.2018.11.002.</mixed-citation></ref><ref id="B40"><label>40.</label><mixed-citation>Hanna S.A., Aston W.J.S., Briggs T.W.R. et al. Sacral chordoma: can local recurrence after sacrectomy be predicted? Clin Orthop Relat Res 2008;466(9):2217–23. DOI: 10.1007/s11999-008-0356-7.</mixed-citation></ref><ref id="B41"><label>41.</label><mixed-citation>Safwat A., Nielsen O.S., Jurik A.G. et al. A retrospective clinicopathological study of 37 patients with chordoma: a Danish national series. Sarcoma 1997;1(3–4):161–5. DOI: 10.1080/13577149778254.</mixed-citation></ref><ref id="B42"><label>42.</label><mixed-citation>Angelini A., Pala E., Calabrò T. et al. Prognostic factors in surgical resection of sacral chordoma J Surg Oncol 2015;112(4):344–51. DOI: 10.1002/jso.23987.</mixed-citation></ref><ref id="B43"><label>43.</label><mixed-citation>Conlon K.C., Boland P.J. Laparoscopically assisted radical sacrococcygectomy: a new operative approach to large sacrococcygeal chordomas. Surg Endosc 1997;11(11):1118–22. DOI: 10.1007/s004649900544.</mixed-citation></ref><ref id="B44"><label>44.</label><mixed-citation>Gennari L., Azzarelli A., Quagliuolo V. A posterior approach for the excision of sacral chordoma. J Bone Jt Surg Ser B. 1987;69(4):565–8. DOI: 10.1302/0301-620X.69B4.3611160.</mixed-citation></ref><ref id="B45"><label>45.</label><mixed-citation>Park L., DeLaney T.F., Liebsch N.J. et al. Sacral chordomas: impact of high-dose proton/photon-beam radiation therapy combined with or without surgery for primary versus recurrent tumor. Int J Radiat Oncol Biol Phys 2006;65(5):1514–21. DOI: 10.1016/j.ijrobp.2006.02.059.</mixed-citation></ref><ref id="B46"><label>46.</label><mixed-citation>Schulz-Ertner D., Karger C.P., Feuerhake A. et al. Effectiveness of carbon ion radiotherapy in the treatment of skull-base chordomas. Int J Radiat Oncol Biol Phys 2007;68(2):449–57. DOI: 10.1016/j.ijrobp.2006.12.059.</mixed-citation></ref><ref id="B47"><label>47.</label><mixed-citation>Boriani S. Chordoma of the mobile spine: fifty years of experience Spine (Phila. Pa. 1976) 2006;31(4):493–503. DOI: 10.1097/01.brs.0000200038.30869.27.</mixed-citation></ref><ref id="B48"><label>48.</label><mixed-citation>DeLaney T.F., Liebsch N.J., Pedlow F.X. et al. Phase II study of high-dose photon/proton radiotherapy in the management of spine sarcomas. Int J Radiat Oncol Biol Phys 2009;74(3):732–9. DOI: 10.1016/j.ijrobp.2008.08.058.</mixed-citation></ref><ref id="B49"><label>49.</label><mixed-citation>Jian B.J., Bloch O.G., Yang I. et al. Adjuvant radiation therapy and chondroid chordoma subtype are associated with a lower tumor recurrence rate of cranial chordoma. J Neurooncol 2010;98:(1):101–8. DOI: 10.1007/s11060-009-0068-1.</mixed-citation></ref><ref id="B50"><label>50.</label><mixed-citation>Moojen W.A., Vleggeert-Lankamp C.L.A., Krol A.D.G., Dijkstra S.P.D. Long-term results: adjuvant radiotherapy in en bloc resection of sacrococcygeal chordoma is advisable. Spine (Phila. Pa. 1976) 2011;36(10):E656–61. DOI: 10.1097/BRS.0b013e3181f8d1f3.</mixed-citation></ref><ref id="B51"><label>51.</label><mixed-citation>Ares C., Hug E.B., Lomax A.J. et al. Effectiveness and safety of spot scanning proton radiation therapy for chordomas and chondrosarcomas of the skull base: first long-term report. Int J Radiat Oncol Biol Phys 2009;75(4):1111–8. DOI: 10.1016/j.ijrobp.2008.12.055.</mixed-citation></ref><ref id="B52"><label>52.</label><mixed-citation>Tamborini E., Virdis E., Negri T. et al. Analysis of receptor tyrosine kinases (RTKs) and downstream pathways in chordomas. Neuro Oncol 2010;12(8):776–89. DOI: 10.1093/neuonc/noq003.</mixed-citation></ref><ref id="B53"><label>53.</label><mixed-citation>Stacchiotti S., Longhi A., Ferraresi V. et al. Phase II study of imatinib in advanced chordoma. J Clin Oncol 2012;30(9):914–20. DOI: 10.1200/JCO.2011.35.3656.</mixed-citation></ref><ref id="B54"><label>54.</label><mixed-citation>Magrini S.M., Papi M.G., Marletta F. et al. Chordoma-natural history, treatment and prognosis the Florence Radiotherapy Department Experience (1956–1990) and a critical review of the literature. Acta Oncol (Madr) 1992:31(8):847–51. DOI: 10.3109/02841869209089717.</mixed-citation></ref><ref id="B55"><label>55.</label><mixed-citation>York J.E., Kaczaraj A., Abi-Said D. et al. Sacral chordoma: 40-year experience at a major cancer center. Neurosurgery 1999;44(1):74–80. DOI: 10.1097/00006123-199901000-00041.</mixed-citation></ref></ref-list></back></article>
