{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,17]],"date-time":"2026-10-17T13:42:54Z","timestamp":1792244574838,"version":"4.4.0"},"reference-count":106,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2023,6,15]],"date-time":"2023-06-15T00:00:00Z","timestamp":1686787200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Cancers"],"abstract":"<jats:p>Soft tissue sarcomas (STS) are an uncommon and biologically heterogeneous group of tumors arising from mesenchymal cells. The incidence is estimated at five cases per 100,000 people per year. Retroperitoneal sarcomas (RPS) account for 10\u201315% of all STS, and their management depends on their anatomical characteristics and histotype. Due to their very low incidence, it is recommended that RPS be treated in reference centers and evaluated by an experienced multidisciplinary team (MDT). In Spain, the Spanish Group for Research in Sarcomas (GEIS) brings together experts from various specialties to promote research on sarcomas and improve treatment results. This paper summarizes the GEIS recommendations for the diagnosis, treatment, and follow-up of patients with RPS.<\/jats:p>","DOI":"10.3390\/cancers15123194","type":"journal-article","created":{"date-parts":[[2023,6,15]],"date-time":"2023-06-15T03:18:46Z","timestamp":1686799126000},"page":"3194","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":18,"title":["Updated Review and Clinical Recommendations for the Diagnosis and Treatment of Patients with Retroperitoneal Sarcoma by the Spanish Sarcoma Research Group (GEIS)"],"prefix":"10.3390","volume":"15","author":[{"given":"Rosa","family":"\u00c1lvarez \u00c1lvarez","sequence":"first","affiliation":[{"name":"Medical Oncology Department, Instituto de Investigacion Sanitaria Gregorio Mara\u00f1on, Hospital Universitario Gregorio Mara\u00f1on, 28007 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ar\u00e1nzazu","family":"Manzano","sequence":"additional","affiliation":[{"name":"Medical Oncology Department, Hospital Universitario Cl\u00ednico San Carlos, 28040 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-4843-5786","authenticated-orcid":false,"given":"Carolina","family":"Agra Pujol","sequence":"additional","affiliation":[{"name":"Pathology Department, Hospital Universitario Gregorio Mara\u00f1on, Complutense University, 28007 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Vicente","family":"Artigas Ravent\u00f3s","sequence":"additional","affiliation":[{"name":"Surgery Department, Hospital Universitario Sant Pau, Universidad Autonoma de Barcelona, 08035 Barcelona, 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Lominchar","sequence":"additional","affiliation":[{"name":"Surgery Department, Hospital Universitario Gregorio Mara\u00f1on, Complutense University, 28040 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0997-2573","authenticated-orcid":false,"given":"Javier","family":"Mart\u00ednez-Trufero","sequence":"additional","affiliation":[{"name":"Medical Oncology Department, Hospital Universitario Miguel Servet, 50009 Zaragoza, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1291-4160","authenticated-orcid":false,"given":"Ramiro","family":"M\u00e9ndez","sequence":"additional","affiliation":[{"name":"Radiology Department, Hospital Universitario Cl\u00ednico San Carlos, 28040 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mercedes","family":"Mu\u00f1oz","sequence":"additional","affiliation":[{"name":"Radiation Oncology Department, Hospital Universitario Gregorio Mara\u00f1on, Complutense University, 28007 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Cristobal","family":"Mu\u00f1oz Casares","sequence":"additional","affiliation":[{"name":"Surgery Department, Hospital San Juan de Dios, 14012 Cordoba, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Francisco","family":"Orbis Castellanos","sequence":"additional","affiliation":[{"name":"Sarcoma Multidisciplinary Unit, Surgery Department, Hospital Universitario y Polit\u00e9cnico La Fe, 46026 Valencia, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1260-7064","authenticated-orcid":false,"given":"Ruth","family":"Orellana Fernandez","sequence":"additional","affiliation":[{"name":"Pathology Department, Hospital Universitario Santa Creu i Sant Pau, 08025 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8562-5242","authenticated-orcid":false,"given":"Miguel","family":"Paniagua Gonz\u00e1lez","sequence":"additional","affiliation":[{"name":"Radiology Department, Hospital Universitario Gregorio Mara\u00f1on, Complutense University, 28007 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7257-5642","authenticated-orcid":false,"given":"Andres","family":"Redondo","sequence":"additional","affiliation":[{"name":"Medical Oncology Department, Hospital Universitario La Paz\u2014IdiPAZ, 28046 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Claudia","family":"Valverde Morales","sequence":"additional","affiliation":[{"name":"Medical Oncology Department, Vall D\u2019Hebron University Hospital, 08035 Barcelona, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-7533-5513","authenticated-orcid":false,"given":"Jose Manuel","family":"Asencio","sequence":"additional","affiliation":[{"name":"Surgery Department, Hospital Universitario Gregorio Mara\u00f1on, Complutense University, 28040 Madrid, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,15]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1348","DOI":"10.1016\/j.annonc.2021.07.006","article-title":"Soft tissue and visceral sarcomas: ESMO-EHURACAN-GENTURIS Clinical Practice Guidelines for diagnosis, treatment, and follow-up","volume":"32","author":"Gronchi","year":"2021","journal-title":"Ann. 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