A Study to Provide Continued Access to and Assess Long-Term Safety of the Study Drug(s)

October 10, 2025 updated by: Daiichi Sankyo

A Master Rollover Study to Provide Continued Access to and Assess Long-Term Safety of the Study Drug(s)

This open-label, multicenter, rollover study will provide continued treatment for participants deriving benefit from different therapies received in studies sponsored by Daiichi Sankyo, Inc. (DS) or DS/Astra Zeneca (AZ)-sponsored study (eg. DS8201-A-J101, DS8201-A-U201, DS8201-A-U204, DS8201-A-U207, DS8201-A-U303).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This Master Rollover Study includes sub-protocols with different study drugs. This Master Rollover Protocol describes core study elements that are applicable to all study drugs that will be provided under the Rollover Study.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
50

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.
  • Name: Daiichi Sankyo Contact for Clinical Trial Information
  • Phone Number: 908-992-6400
  • Email: CTRinfo@dsi.com

Study Locations

  • Australia
      • Bedford Park, Australia, 5042
        • Active, not recruiting
        • Flinders Medical Center
      • Melbourne, Australia, 3168
        • Withdrawn
        • Monash Medical Center
  • Belgium
      • Charleroi, Belgium, 6000
        • Recruiting
        • Grand Hôpital de Charleroi
  • Brazil
      • Rio de Janeiro, Brazil
        • Not yet recruiting
        • Instituto Aericas
      • São Paulo, Brazil
        • Not yet recruiting
        • A.C. Camargo Cancer Center
      • São Paulo, Brazil
        • Not yet recruiting
        • IBCC Nucleo de Pequisa e Ensino
  • France
      • Villejuif, France, 94805
        • Recruiting
        • Institut Gustave Roussy
  • Israel
      • Petah Tikva, Israel
        • Active, not recruiting
        • Rabin Medical Center
  • Italy
      • Milan, Italy, 20132
        • Recruiting
        • Ospedale San Raffaele
      • Napoli, Italy, 80131
        • Withdrawn
        • Istituto Nazionale Tumori Fondazione G. Pascale
  • Japan
      • Chūō, Japan, 104-0045
        • Recruiting
        • National Cancer Center Hospital
  • South Korea
      • Daegu, South Korea, 41404
        • Recruiting
        • Kyungpook National University Chilgok Hospital
      • Gyeonggi-do, South Korea, 10408
        • Recruiting
        • National Cancer Center
      • Gyeonggi-do, South Korea, 13620
        • Withdrawn
        • Seoul National University Bundang Hospital
      • Jongno-gu, South Korea, 03080
        • Recruiting
        • Seoul National University Hospital
      • Seoul, South Korea, 05505
        • Recruiting
        • Asan Medical Center
      • Seoul, South Korea, 06351
        • Recruiting
        • Samsung Medical Center
      • Seoul, South Korea, 03722
        • Recruiting
        • Severance Hospital, Yonsei University
  • Spain
      • A Coruña, Spain, 15006
        • Recruiting
        • Complejo Hospitalario Universitario A Coruna
      • Barcelona, Spain, 08035
        • Recruiting
        • Hospital Universitari Vall d'Hebron
      • Distrito de Les Corts, Spain, 08028
        • Not yet recruiting
        • Hospital Universitari Dexeus
      • L'Hospitalet de Llobregat, Spain, 08908
        • Recruiting
        • ICO l'Hospitalet - Hospital Duran i Reynals
      • Madrid, Spain, 28034
        • Withdrawn
        • Hospital Ruber Internacional
  • Taiwan
      • Tainan City, Taiwan, 704
        • Withdrawn
        • National Cheng Kung University Hospital
      • Taipei, Taiwan, 10002
        • Withdrawn
        • National Taiwan University Hospital
  • United Kingdom
      • Guildford, United Kingdom, GU2 7XX
        • Withdrawn
        • Royal Surrey County Hospital
  • United States
    • Florida
      • Miami, Florida, United States, 33176
        • Recruiting
        • Miami Cancer Institute
    • North Carolina
      • Durham, North Carolina, United States, 27710
        • Recruiting
        • Duke University - Trent Center

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Signed informed consent form, prior to the start of any study-specific qualification procedures and willing to comply with all study requirements.
  • Currently enrolled in a DS or DS/AZ-sponsored parent study that has met EOS definition.
  • No evidence of progressive disease and determined to have investigator-assessed clinical benefit from continued treatment with a DS or DS/AZ alliance study drug(s).

Exclusion Criteria:

  • Participants with any unresolved/ongoing AE(s) that meets the study drug discontinuation criteria
  • Participant who has been off T-DXd therapy for >18 weeks (126 days) between the last dose from the parent study and the initiation of study drug administration on this study

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: T-DXd

Participants who choose to continue treatment with T-DXd may be enrolled. Participants who were on the comparator arm in the parent study will be provided the option to access the drug through standard of care (SoC) or other available options.

Participants will remain on their current dosage regimen of T-DXd as the last dose administered in the parent study, unless they experience an AE that requires dose reduction at the EOT of the parent study, in which case the starting dose in this study will be the next lower dose-level.
Drug: T-DXd
T-DXd (DS8201a) will be administered as an intravenous (IV) infusion, on Day 1 of each 21-day cycle according to the dosage regimens
Other Names:
  • DS8201a

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Number of Participants Reporting Treatment-emergent Adverse Events Leading to Study Drug discontinuation and/or Dose Reduction, Treatment-emergent Serious Adverse Events (TESAEs), and Treatment-emergent Adverse Events of Special Interest (AESIs)
Time Frame: Baseline until disease progression, loss of clinical benefit, death, adverse event, pregnancy, withdrawal of consent, access to commercial supply, physician decision, or study closure, whichever occurs first, up to approximately 2 years 9 months
Baseline until disease progression, loss of clinical benefit, death, adverse event, pregnancy, withdrawal of consent, access to commercial supply, physician decision, or study closure, whichever occurs first, up to approximately 2 years 9 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Daiichi Sankyo

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
AstraZeneca

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Global Clinical Leader, Daiichi Sankyo

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
January 5, 2024

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
August 3, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
January 17, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
December 8, 2023

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 8, 2023

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 18, 2023

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 15, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
October 10, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
October 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • ROMast-001
  • 2023-506330-73-00 (Other Identifier: EU CTIS)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

De-identified individual participant data (IPD) on completed studies and applicable supporting clinical trial documents may be available upon request at https://vivli.org/. In cases where clinical trial data and supporting documents are provided pursuant to our company policies and procedures, Daiichi Sankyo will continue to protect the privacy of our clinical trial participants. Details on data sharing criteria and the procedure for requesting access can be found at this web address: https://vivli.org/ourmember/daiichi-sankyo/

IPD Sharing Time Frame

Completed studies that has reached a global end or completion with all data set collected and analyzed, and for which the medicine and indication have received European Union (EU) and United States (US), and/or Japan (JP) marketing approval on or after 01 January 2014 or by the US or EU or JP Health Authorities when regulatory submissions in all regions are not planned and after the primary study results have been accepted for publication.

IPD Sharing Access Criteria

Formal request from qualified scientific and medical researchers on IPD and clinical study documents on completed clinical trials supporting products submitted and licensed in the United States, the European Union and/or Japan from 01 January 2014 and beyond for the purpose of conducting legitimate research. This must be consistent with the principle of safeguarding study participants' privacy and consistent with provision of informed consent.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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