# Collection of Tissue Samples for Study of Multidrug Resistance

> **NCT00880503** · — · COMPLETED · sponsor: **National Cancer Institute (NCI)** · enrollment: 325 (actual)

## Conditions studied

- Breast Carcinoma
- Breast Cancer
- Medullary Thyroid Carcinoma

## Interventions

_None listed._

## Key facts

- **NCT ID:** NCT00880503
- **Lead sponsor:** National Cancer Institute (NCI)
- **Sponsor class:** NIH
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2003-12-19
- **Primary completion:** —
- **Final completion:** 2018-02-08
- **Target enrollment:** 325 (ACTUAL)
- **Last updated:** 2019-12-16


## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT00880503

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT00880503, "Collection of Tissue Samples for Study of Multidrug Resistance". Retrieved via AI Analytics 2026-05-27 from https://api.ai-analytics.org/clinical/NCT00880503. Licensed CC0.

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