# Retrospective Study of 2nd-line Therapies After CDK4/6i + Hormonal Therapy in HR+/HER2- Advanced Breast Cancer

> **NCT05173103** · — · COMPLETED · sponsor: **University of Milano Bicocca** · enrollment: 254 (actual)

## Conditions studied

- Advanced Breast Cancer
- Hormone Receptor Positive Breast Carcinoma
- HER2-negative Breast Cancer

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT05173103
- **Lead sponsor:** University of Milano Bicocca
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2021-09-24
- **Primary completion:** 2024-01-30
- **Final completion:** 2024-12-30
- **Target enrollment:** 254 (ACTUAL)
- **Last updated:** 2025-07-25


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT05173103

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT05173103, "Retrospective Study of 2nd-line Therapies After CDK4/6i + Hormonal Therapy in HR+/HER2- Advanced Breast Cancer". Retrieved via AI Analytics 2026-06-23 from https://api.ai-analytics.org/clinical/NCT05173103. Licensed CC0.

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