Dr.ย Jeeyunย Lee
M.D., M.S., Ph.D.
Professor, Division of Hematology-Oncology
corporate_fareSamsung Medical Center, Seoul
Jeeyun Lee
M.D., M.S., Ph.D.
Prof. Jeeyun Lee is a Professor in the Division of Hematology-Oncology at Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, South Korea. She is internationally recognised for her expertise in gastrointestinal oncology, with a particular focus on gastric cancer, colorectal cancer, and precision cancer therapy.
Prof. Lee serves as Director of the Precision Oncology Center and Director of the Experimental Therapeutics Development Center at Samsung Medical Center โ two centres that sit at the intersection of clinical care, drug development, and genomic medicine. Her work focuses on matching cancer treatment to tumour biology through molecular profiling, biomarker-driven therapy, HER2-directed treatment in gastric and gastroesophageal cancers, and early-phase oncology clinical trials. A 2025 conference CV summary reports her as principal investigator in more than 50 phase I trials, including more than 30 first-in-human studies, and more than 200 phase II trials. She completed a visiting scientist fellowship at the Sidney Kimmel Cancer Center in San Diego and has held academic appointments at Sungkyunkwan University since 2010, progressing to full Professor in 2020.
CancerFax can coordinate medical-report review and consultation support for international patients seeking access to Prof. Lee's expertise at Samsung Medical Center, subject to hospital scheduling and case acceptance.
Why Consider Prof. Jeeyun Lee?
Prof. Lee brings together deep clinical expertise in gastric and gastrointestinal cancers with a leading role in precision oncology drug development at one of South Korea's foremost cancer centres.
Areas of Specialisation
Gastrointestinal oncology, precision cancer therapy, and clinical trial-based treatment at Samsung Medical Center
Prof. Lee's clinical and research work centres on gastric cancer, colorectal cancer, and gastrointestinal cancers more broadly, using tumour biology and genomic data to guide individualised treatment decisions.
Gastric & Gastrointestinal Cancer
Advanced medical oncology for stomach, colorectal, liver, and rare gastrointestinal cancers.
- arrow_rightHER2-positive gastric and gastroesophageal adenocarcinoma treatment
- arrow_rightPrecision-guided systemic therapy for advanced and metastatic gastric cancer
- arrow_rightPD-1 inhibition strategies in metastatic gastric cancer
- arrow_rightSystemic treatment planning for advanced colorectal cancer
- arrow_rightKRAS-aberration-guided therapy in metastatic GI cancers
- arrow_rightMultidisciplinary care for liver cancer and rare GI malignancies
Precision Oncology & Targeted Therapy
Molecularly guided treatment approaches using genomic profiling and biomarker data.
- arrow_rightNext-generation sequencing-guided treatment selection
- arrow_rightMolecular profiling of tumours to identify actionable alterations
- arrow_rightRICTOR amplification and mTOR pathway-targeted strategies in advanced gastric cancer
- arrow_rightPD-1 and PD-L1 inhibitor therapy for eligible patients
- arrow_rightTumour immunoprofiling to guide checkpoint inhibitor selection
- arrow_rightCell-free circulating tumour DNA-guided therapy in refractory solid cancers
Early-Phase Clinical Trials
Drug development and trial-based treatment for patients with advanced or treatment-resistant cancers.
- arrow_rightFirst-in-human and early-phase trial design and conduct
- arrow_rightPatient-derived tumour cell models for pharmacogenomic profiling
- arrow_rightClinical trial access for patients with advanced GI and solid tumours
Procedures & Treatment Approaches
Medical oncology, precision therapy, and clinical trial-based services
Prof. Lee provides comprehensive medical oncology services for gastrointestinal and solid tumour malignancies, with a focus on precision-guided therapy and early-phase trial access.
Gastric & GI Cancer Treatment
Medical OncologySystemic treatment planning for stomach, colorectal, liver, and gastrointestinal cancers using chemotherapy, targeted agents, and immunotherapy.
Precision & Targeted Cancer Therapy
Targeted TherapyGenomic profiling and biomarker-guided treatment selection for patients with actionable tumour alterations.
Early-Phase Clinical Trials
Complex DiseasePhase I and phase II trial-based treatment options for patients with advanced, recurrent, or treatment-resistant cancers.
Second Opinion & Multidisciplinary Review
Second OpinionExpert second-opinion review for patients with gastric cancer, GI malignancies, or advanced solid tumours.
Research & Publications
Translational oncology, gastric cancer genomics, and precision medicine
Prof. Lee has a substantial academic profile in gastric cancer, precision oncology, and early-phase drug development, with research spanning biomarker-guided therapy, immunotherapy, and patient-derived tumour models.
Prof. Lee's full publication list is available on Google Scholar (Samsung Medical Center / Sungkyunkwan University) and the Sungkyunkwan University faculty profile. A detailed list may be available on request.
Education & Training
Prof. Lee completed her medical training at Ewha Womans University and pursued all postgraduate and fellowship training at Samsung Medical Center and Sungkyunkwan University, before undertaking a visiting scientist fellowship at the Sidney Kimmel Cancer Center in San Diego.
Clinical Experience
Prof. Lee has spent her entire career at Samsung Medical Center and Sungkyunkwan University School of Medicine, progressing from Clinical Assistant Professor to full Professor, and assuming directorship roles in precision oncology and experimental therapeutics from 2019.
Languages & International
Prof. Lee consults in the following languages. Additional language support may be available through Samsung Medical Center's International Healthcare Center.
CancerFax can coordinate professional medical interpreter support for international patients consulting with Prof. Lee through Samsung Medical Center.
CancerFax can coordinate professional medical interpreter support for international patients when required.
How CancerFax Helps You Access Dr. Jeeyun Lee
CancerFax is a specialist cancer patient-navigation platform. We help international patients prepare structured medical summaries, assess treatment eligibility, and connect directly with Dr. Jeeyun Lee's team โ with full coordination from initial inquiry to consultation.
Medical Report Review
Free review of your pathology results, imaging, molecular profiling, and treatment history โ prepared as a structured clinical summary for Dr. Jeeyun Lee's team.
Treatment Eligibility Screening
CancerFax screens your case for eligibility for treatments and clinical programmes available through Dr. Jeeyun Lee before you travel, so you arrive with a clear pathway.
Case Submission
We coordinate direct case submission to Dr. Jeeyun Lee's department, including all documentation required for clinical review and appointment scheduling.
Appointment & Consultation Coordination
CancerFax manages appointment scheduling with Dr. Jeeyun Lee's team, confirming availability and aligning timelines with your travel plans.
Travel, Visa & Logistics Support
We prepare visa invitation letters, provide hospital-proximity accommodation guidance, and coordinate airport transfers for international patients.
Follow-Up & Continuity of Care
After your consultation or treatment, CancerFax facilitates communication between Dr. Jeeyun Lee's team and your home oncologist for seamless post-treatment follow-up.
Frequently Asked Questions About Prof. Jeeyun Lee
Prof. Lee specialises in gastric and stomach cancer, colorectal cancer, gastrointestinal cancers, liver cancer, and rare cancers. Samsung Medical Center lists her under five specialist centres: the Gastric Cancer Center, Colorectal Cancer Center, Liver Cancer Center, Precision Oncology Therapeutic Center, and Rare Cancer Center.
Prof. Lee is a Professor in the Division of Hematology-Oncology at Samsung Medical Center and Sungkyunkwan University School of Medicine. She also serves as Director of the Precision Oncology Center and Director of the Experimental Therapeutics Development Center at Samsung Medical Center.
Samsung Medical Center operates an International Healthcare Center that provides services for international patients. CancerFax can support report review, case preparation, and consultation coordination for international patients seeking access to Prof. Lee, subject to hospital scheduling and case acceptance.
You can submit your medical reports through CancerFax. The CancerFax team will review the documents, prepare the case, and coordinate the next steps with Samsung Medical Center, subject to availability and hospital processes.
A second-opinion request can be submitted through CancerFax with the patient's pathology reports, imaging, treatment history, and relevant test results. Prof. Lee has expertise in precision oncology-based re-evaluation of gastric and GI cancer cases. The final consultation format and availability depend on Samsung Medical Center's scheduling.
Yes. Prof. Lee has extensive clinical trial experience, reported as principal investigator in more than 50 phase I trials โ including more than 30 first-in-human studies โ and more than 200 phase II trials. Patients with advanced, recurrent, or treatment-resistant gastrointestinal cancers may be eligible to discuss trial-based options during a consultation.
Connect with Jeeyun Lee Today
Share your medical reports for a free preliminary review. Our patient coordinators will help you understand your options and arrange a direct consultation.
Medical Disclaimer: Information on this page is for educational purposes only and does not constitute medical advice. Always consult a qualified healthcare provider before making any medical decisions.