institutionsInstitution
Hospital General Universitario Gregorio Marañón
Gregorio Marañón is a Madrid public hospital with a leading breast cancer research group (GEICAM).
Breast oncology (Martín, GEICAM founder), GI oncology.
Location
Madrid, ES
Type
hospital
Newsweek 2026 oncology rank
#40
OnCo score
#204 · 26 points (20 Newsweek + 0 NCI + 6 from 3 linked objects) · ranking
- 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.