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Dr Jennifer Leong Siew Mooi

Clinical Oncologist


Dr. Jennifer Leong Siew-Mooi graduated with Masters in Clinical Oncology from Universiti Malaya in 2015 and went to practice at the renowned National Cancer Institute up until 2020. She is currently a Consultant Clinical Oncologist at Sunway Medical Center. Dr. Leong is experienced in specialized radiotherapy planning technique such as intensity modulated training (IMRT), stereotactic radiosurgery (SRS), stereotactic body radiotherapy (SBRT) as well as image-guided 3D brachytherapy for gynecologic malignancies. She also offers advice on suitable systemic treatment such as systemic chemotherapy, targeted therapy and immunotherapy on various solid tumors. Her main interests lie in the management of breast, lung and gynecological malignancies. Dr. Leong currently holds an active position in the working committee for the latest update of National Breast Cancer Clinical Practice Guideline. Besides being a clinician, she is passionate in promoting patient advocacy and cancer awareness among the public.

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