Efficacy and Safety of 80mg Osimertinib in Patients With Non-small Cell Lung Cancer(NSCLC)
BLOSSOM
A Phase II, Open-label, Single-arm, Multicenter, Efficacy and Safety of 80mg Osimertinib in Patients With Leptomeningeal Metastases(LM) Associated With EGFR Mutation-positive Non-small Cell Lung Cancer(NSCLC)
1 other identifier
interventional
73
1 country
6
Brief Summary
This will be a Phase II, open-label, single-arm, multicenter study of the efficacy and safety of osimertinib (80 mg orally once daily) in patients with LM associated with EGFRm+ NSCLC.
Trial Health
Trial Health Score
Automated assessment based on enrollment pace, timeline, and geographic reach
participants targeted
Target at P50-P75 for phase_2
Started Nov 2020
Typical duration for phase_2
6 active sites
Health score is calculated from publicly available data and should be used for screening purposes only.
Trial Relationships
Click on a node to explore related trials.
Study Timeline
Key milestones and dates
First Submitted
Initial submission to the registry
September 14, 2020
CompletedFirst Posted
Study publicly available on registry
September 25, 2020
CompletedStudy Start
First participant enrolled
November 17, 2020
CompletedPrimary Completion
Last participant's last visit for primary outcome
October 25, 2023
CompletedStudy Completion
Last participant's last visit for all outcomes
October 25, 2023
CompletedJanuary 9, 2026
January 1, 2026
2.9 years
September 14, 2020
January 7, 2026
Conditions
Outcome Measures
Primary Outcomes (1)
Overall survival
To investigate the efficacy of osimertinib on LM as measured by OS
Up to 30 months
Secondary Outcomes (5)
LM ORR(Objective response rate)
Up to 30 months
LM DoR(Duration of response)
Up to 30 months
LM DCR(Disease control rate)
Up to 30 months
LM PFS(Progression-free survival)
Up to 30 months
CSF response rate based on CSF cytology
Up to 30 months
Study Arms (1)
80mg Osimertinib
EXPERIMENTALOne tablet of 80mg Osimertinib for oral administration per day
Interventions
One tablet of 80mg Osimertinib for oral administration per day
Eligibility Criteria
You may qualify if:
- Capable of giving signed informed consent which includes compliance with the requirements and restrictions listed in the informed consent form (ICF) and in this protocol.
- Provision of signed and dated written ICF prior to any mandatory study specific procedures, sampling, and analyses.
- Male and female patients must be at least 18 years of age.
- Patients must have documented (only allowed for EGFRm+ \[exon 19 deletions or L858R\] in pre-treated patients) and/or confirmed central/local test result showing eligible EGFR mutation status as specified below:
- \- EGFR TKI pre-treated patients: EGFRm+ (exon 19 deletions or L858R), along with valid T790M mutation status
- All patients will be required to have NSCLC associated with at least 1 site of LM as identified by the Investigator that can be assessed by MRI scan and that is suitable for repeat assessments. Measurable INC or EXC disease by RECIST 1.1 is not required. Concomitant brain metastases and brain metastases previously treated with radiation therapy are allowed. In addition, asymptomatic untreated BM is also allowed.
- EGFR TKI pre-treated patients must have had at least 1 prior EGFR TKI (eg, gefitinib, erlotinib, icotinib, dacomitinib or afatinib) and may have had other lines of therapy
- If the patients is T790M negative, EXC must be stable following previous EGFR TKI treatment. EXC progression is allowed if patients are T790M positive patients
- ECOG/WHO performance status 0 to 2 with no deterioration over the previous 2 weeks and a minimum life expectancy of 12 weeks.
- Females must be using highly effective contraceptive measures and must have a negative pregnancy test prior to start of dosing if of childbearing potential, or must have evidence of non-childbearing potential by fulfilling one of the following criteria at screening:
- Post-menopausal, defined as aged more than 50 years and amenorrheic for at least 12 months following cessation of all exogenous hormonal treatments
- Women under 50 years old would be considered postmenopausal if they have been amenorrheic for 12 months or more following cessation of exogenous hormonal treatments and with luteinizing hormone and follicle-stimulating hormone levels in the post-menopausal range for the institution
- Documentation of irreversible surgical sterilization by hysterectomy, bilateral oophorectomy, or bilateral salpingectomy but not tubal ligation Further information is in Appendix I (Definition of women of childbearing potential and acceptable contraceptive methods).
- Male patients must be willing to use barrier contraception
- If a patient declines to participate in any voluntary exploratory research of the study, there will be no penalty or loss of benefit to the patient and he/she will not be excluded from other aspects of the study.
You may not qualify if:
- EGFR TKI pre-treated patients whose T790M mutation status cannot be determined.
- EGFR TKI pre-treated patients with progressing EXC disease who are T790M mutation-negative. Progressing EXC disease is defined as RECIST 1.1 PD no more than 3 months prior to enrollment, per Investigator assessment.
- Past medical history of ILD, drug-induced ILD, radiation pneumonitis that required steroid treatment, or any evidence of clinically active ILD.
- Significant medical or psychiatric illness that would interfere with compliance and ability to tolerate treatment as outlined in the protocol.
- Any of the following cardiac criteria:
- Mean resting corrected QTc \>470 msec, obtained from ECGs, using the screening clinic ECG machine-derived QTc value
- Any clinically important abnormalities in rhythm, conduction, or morphology of resting ECG (eg, complete left bundle branch block, third degree heart block, and second degree heart block)
- Patients with any factors that increase the risk of QTc prolongation or risk of arrhythmic events such as the following electrolyte abnormalities, heart failure, congenital long QT syndrome, family history of long QT syndrome, or unexplained sudden death under 40 years of age in first-degree relatives or any concomitant medication known to prolong the QT interval and cause Torsades de Pointes (TdP):
- Hypokalemia (serum potassium \<3.5 mmol/L)
- Hypomagnesemia (serum magnesium \<0.7 mmol/L)
- Hypocalcemia (corrected serum calcium \<2.1 mmol/L)
- Inadequate bone marrow reserve or organ function as demonstrated by any of the following laboratory values:
- Absolute neutrophil count \<1.5×109/L
- Platelet count \<100×109/L
- Hemoglobin \<90 g/L
- +29 more criteria
Contact the study team to confirm eligibility.
Sponsors & Collaborators
- Samsung Medical Centerlead
- AstraZenecacollaborator
Study Sites (6)
ChungBuk National University Hospital
Cheonju, South Korea
National Cancer Center
Goyang, South Korea
Seoul National University Bundang Hospital
Seongnam, South Korea
Samsung Medical Center
Seoul, 135-710, South Korea
Asan Medical Center
Seoul, South Korea
Seoul National University Hospital
Seoul, South Korea
Related Publications (1)
Park S, Baldry R, Jung HA, Sun JM, Lee SH, Ahn JS, Kim YJ, Lee Y, Kim DW, Kim SW, Lee KH, Lee WJ, Choi JW, Chong K, Lee JI, Gwon SH, Son NH, Ahn MJ. Phase II Efficacy and Safety of 80 mg Osimertinib in Patients With Leptomeningeal Metastases Associated With Epidermal Growth Factor Receptor Mutation-Positive Non-Small Cell Lung Cancer (BLOSSOM). J Clin Oncol. 2024 Aug 10;42(23):2747-2756. doi: 10.1200/JCO.24.00708. Epub 2024 Jun 3.
PMID: 38828959DERIVED
MeSH Terms
Conditions
Interventions
Condition Hierarchy (Ancestors)
Study Officials
- PRINCIPAL INVESTIGATOR
Se-Hoon Lee, M.D, Ph.D.
Samsung Medical Center
Study Design
- Study Type
- interventional
- Phase
- phase 2
- Allocation
- NA
- Masking
- NONE
- Purpose
- TREATMENT
- Intervention Model
- SINGLE GROUP
- Sponsor Type
- OTHER
- Responsible Party
- PRINCIPAL INVESTIGATOR
- PI Title
- Coordinating investigator
Study Record Dates
First Submitted
September 14, 2020
First Posted
September 25, 2020
Study Start
November 17, 2020
Primary Completion
October 25, 2023
Study Completion
October 25, 2023
Last Updated
January 9, 2026
Record last verified: 2026-01
Data Sharing
- IPD Sharing
- Will not share