# Characterization of Innate Immune System in Patients With Luminal Advanced Breast Cancer

> **NCT04370522** · — · TERMINATED · sponsor: **Spanish Breast Cancer Research Group** · enrollment: 32 (actual)

## Conditions studied

- Metastatic Breast Cancer

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT04370522
- **Lead sponsor:** Spanish Breast Cancer Research Group
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** TERMINATED
- **Start date:** 2021-05-21
- **Primary completion:** 2025-03-24
- **Final completion:** 2025-03-24
- **Target enrollment:** 32 (ACTUAL)
- **Why stopped:** Lack of funding to continue the research into Phase II
- **Last updated:** 2026-05-05


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT04370522

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT04370522, "Characterization of Innate Immune System in Patients With Luminal Advanced Breast Cancer". Retrieved via AI Analytics 2026-05-28 from https://api.ai-analytics.org/clinical/NCT04370522. Licensed CC0.

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