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Hospital General Universitario Gregorio Marañón
Gregorio Marañón is a Madrid public hospital with a leading breast cancer research group (GEICAM).
Overview
Hospital General Universitario Gregorio Marañón is a Madrid public hospital ranked fortieth in the Newsweek/Statista World's Best Specialized Hospitals list for oncology, and it matters for breast cancer research. Its breast oncology group is associated with Miguel Martín, founder of the GEICAM Spanish Breast Cancer Group, and Sara López-Tarruella, and it also has a gastrointestinal oncology programme. OnCo links it to HR-positive, HER2-negative breast cancer and to triple-negative breast cancer, and GEICAM has its own institution page. How an academic cooperative group housed in a public hospital keeps influence as breast trials become industry-led is the question its history raises. Its breast programme is the reason to read on.
Location
Madrid, ES
Type
hospital
Newsweek 2026 oncology rank
#40
OnCo score
#159 · 32 points (20 Newsweek + 0 NCI + 12 from 6 linked objects) · ranking
Research output
From OpenAlex, oncology works in the last five years (2022 to 2026, current year in progress); counted on 2026-09-24.
Matched to Hospital General Universitario Gregorio Marañón, including child institutions. 632 works · 5,719 citations · 68% open access · 16% clinical trials · 1% reviews.
Oncology works per year
1202022
1262023
1612024
1252025
1002026
Most works
- Mi Kwon84 works
- Mariana Bastos‐Oreiro65 works
- Iván Márquez‐Rodas50 works
- Pilar García Alfonso46 works
- Pere Barba41 works
- Rebeca Bailén41 works
- Miguel Martín37 works
- Andrés J. Muñoz Martín36 works
- Lucía López‐Corral32 works
- Gloria Iacoboni31 works
Most cited
- Breast cancer (GEICAM)
Miguel Martín
Head of Medical Oncology, Hospital General Universitario Gregorio Marañón; Chairman, GEICAM
Breast cancerAdjuvant chemotherapyCooperative group trials
Miguel Martín is the founder of the Spanish breast cancer group GEICAM and a leader of adjuvant chemotherapy trials.
Sara López-Tarruella
Medical Oncologist, Hospital General Universitario Gregorio Marañón
Breast cancerTriple-negative diseaseNeoadjuvant trials
Sara López-Tarruella is a breast oncologist leading GEICAM neoadjuvant studies in triple-negative disease.
Sonia García de San José
Representative of Hospital General Universitario Gregorio Marañón to the Organisation of European Cancer Institutes
Cancer centre representation (OECI)
Sonia García de San José represents Hospital General Universitario Gregorio Marañón in the Organisation of European Cancer Institutes, which lists the centre among its members in Spain.
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- TrialGEICAM/2003-11_CIBOMA/2004-01
Shares GEICAM Spanish Breast Cancer Group, Triple-negative breast cancer (TNBC).
- TrialPALLAS & PENELOPE-B
Shares Miguel Martín, HR-positive / HER2-negative breast cancer.
- CompanySOLTI Cancer Research Group
Shares GEICAM Spanish Breast Cancer Group, Triple-negative breast cancer (TNBC), HR-positive / HER2-negative breast cancer.
- CompanyBreast International Group (BIG)
Shares GEICAM Spanish Breast Cancer Group, Triple-negative breast cancer (TNBC), HR-positive / HER2-negative breast cancer.
- TrialmonarchE
Shares Miguel Martín, HR-positive / HER2-negative breast cancer.