Medical and Radiation Oncology

One form of cancer treatment involves ionizing radiation to control malignant cells.  This is called radiation oncology, radiation therapy or radiotherapy, sometimes abbreviated to XRT (not to be confused with radiology, the use of radiation in medical imaging and diagnosis). Radiotherapy may be used for curative or adjuvant (supportive) treatment. Where cure is not possible and the aim is for local disease control or symptomatic relief, it is used as palliative treatment. Where the therapy has survival benefit and it can be curative, it is used as therapeutic treatment. Total body irradiation (TBI) is a radiotherapy technique used to prepare the body to receive a bone marrow transplant.

Radiotherapy is used for the treatment of malignant cancer, and may be used as a primary or adjuvant modality. It is also common to combine radiotherapy with surgery, chemotherapy, hormone therapy, Immunotherapy or some mixture of the four. Most common cancer types can be treated with radiotherapy in some way.  The precise treatment intent (curative, adjuvant, neoadjuvant, therapeutic, or palliative) will depend on the tumour type, location, and stage, as well as the general health of the patient.

Radiation therapy is commonly applied to the cancerous tumour but may also include the draining lymph nodes if they are clinically or radiologically involved with tumour, or if there is thought to be a risk of subclinical malignant spread. 

To treat the tumour and spare normal tissues, shaped radiation beams are aimed from several angles of exposure to intersect at the tumour, providing a much larger absorbed dose there than in the surrounding, healthy tissue.

Another form of radiation therapy that minimizes exposure to healthy tissue during procedures to treat cancers of the breast, prostate and other organs is brachytherapy.  In this procedure, a radiation source is placed inside or next to the area requiring treatment.

Occasionally, radiotherapy can also be used to treat certain non-malignant conditions, although this is rarely done for fear of the risk of radiation-induced cancers.

Our Doctors Specializing In Medical and Radiation Oncology

Dr Christina Ng Van Tze

MBBS (Melb), FRACP (Australia)
Specialty: Medical and Radiation Oncology
Location : Sunway Medical Centre , Pantai Hospital Kuala Lumpur

Dr Daniel Wong Wai Yan

MBBS (Hons)(Sydney), MRCP, FRCR,CCT (UK), AM (Mal)
Specialty: Medical and Radiation Oncology
Location : Pantai Hospital Ayer Keroh

Dr Rachael Khong Kit-Tsan

MB ChB (Hons.) (Leeds, UK), MRCP (UK), FRCR (UK), CCT Clinical Oncology (London), AM (Mal)
Specialty: Medical and Radiation Oncology
Location : Prince Court Medical Centre