Álvarez Álvarez, Rosa et al.Valverde Morales, ClaudiaAgra Pujol, CarolinaMéndez Fernández, Ramiro JesúsMuñoz Fernández, María De Las MercedesAsencio Pascual, José Manuel2024-04-262024-04-262023-06-15Álvarez Álvarez, R.; Manzano, A.; Agra Pujol, C.; Artigas Raventós, V.; Correa, R.; Cruz Jurado, J.; Fernandez, J.A.; Garcia del Muro, X.; Gonzalez, J.A.; Hindi, N.; et al. Updated Review and Clinical Recommendations for the Diagnosis and Treatment of Patients with Retroperitoneal Sarcoma by the Spanish Sarcoma Research Group (GEIS). Cancers 2023, 15, 3194. https://doi.org/10.3390/cancers1512319410.3390/cancers15123194https://hdl.handle.net/20.500.14352/103592Soft 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 10–15% 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.engAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/journal article10.3390/cancers15123194https://www.mdpi.com/2072-6694/15/12/3194open access616-006.04Retroperitoneal sarcomaSoft tissue sarcomaRetroperitoneumMultidisciplinary boardReference centersOncología3201.01 Oncología