Dr Peter Ang is a senior consultant medical oncologist at OncoCare Cancer Centre in Singapore. His listed clinical interests are breast cancer, breast cancer genetics, young-onset breast cancer and lung cancer.
Before entering private practice he was a senior consultant medical oncologist at the National Cancer Centre Singapore, where he was involved in the breast cancer service and cancer education. He has also served as a visiting consultant for the cancer genetics service at KK Women’s and Children’s Hospital.
Clinical focus
Medical oncology — breast cancer.
Qualifications (as publicly listed)
MBBS (Singapore), MRCP (United Kingdom), M.Med (Singapore), FAMS (Medical Oncology).
Where they practise
- Clinic / practice: OncoCare Cancer Centre (see our clinic listing) — Orchard / Novena
- Hospital / training affiliation(s): Mount Elizabeth Hospital / Mount Elizabeth Novena; formerly National Cancer Centre Singapore
Getting to the clinic
Dr Peter Ang is a senior consultant medical oncologist at OncoCare Cancer Centre, with consulting locations in the Orchard and Novena areas. For the Orchard location near Mount Elizabeth, the nearest stations are Orchard MRT (NS22/TE14) and, for Paragon Medical, Orchard or Somerset MRT, with sheltered walkways linking the stations to the medical buildings. For the Novena location, Novena MRT (NS20) connects through a mall and covered links to the medical precinct along Irrawaddy Road and nearby streets.
Both areas are well served by bus routes, and taxis or ride-hailing services can set you down at the building entrances, convenient when you are tired or unwell during treatment. The private medical centres have paid visitor carparks that can be busy at clinic times. As OncoCare operates from more than one address, confirm the exact location and suite when booking, and allow extra time on a first visit to register.
What breast cancer medical oncology covers
Medical oncology uses medicines to treat cancer. Dr Ang’s listed clinical interests are breast cancer, breast cancer genetics, young-onset breast cancer and lung cancer, and he previously served as a visiting consultant for the cancer genetics service at KK Women’s and Children’s Hospital. Breast cancer treatment is highly individualised, drawing on the tumour’s hormone-receptor and other features to choose between chemotherapy, hormonal (endocrine) therapy, targeted therapy and immunotherapy, usually coordinated with surgeons and radiation oncologists.
His interest in breast cancer genetics and young-onset breast cancer reflects the importance of family history and inherited risk in some patients. Where an inherited predisposition is suspected, genetic counselling and testing can inform both treatment and the management of relatives’ risk.
What to expect at a consultation
A first consultation usually involves a careful review of your diagnosis, scans, biopsy and pathology results — including hormone-receptor and other tumour markers — and any treatment so far, along with a history of your symptoms, other conditions and medicines. The doctor will examine you and explain the type and stage of the cancer. Further tests or tumour profiling may be recommended, and family history will be reviewed where genetic risk is relevant.
The oncologist will then discuss the aims and options for treatment, including likely benefits, side effects and schedule, and how systemic treatment fits with surgery or radiotherapy. There is usually time for questions and to involve family before any decisions are made.
Preparing for your appointment
It helps to bring:
- Photo identification and any GP, polyclinic or specialist referral letter.
- Relevant scans, biopsy and pathology reports, and previous treatment summaries.
- A full list of current medicines and supplements with doses.
- A written timeline of your symptoms and any breast changes.
- Details of your family history of breast or related cancers, which can be important.
- A list of questions, and ideally someone to accompany you.
After your consultation and follow-up
After the consultation you will usually receive a treatment plan or a list of tests to complete first. Treatment is monitored at follow-up with examinations, blood tests and scans to check response and manage side effects. Breast cancer care is multidisciplinary, so referrals to breast surgeons, radiation oncologists, genetic counselling or supportive services may be arranged. Continuity of care matters, and a second opinion is reasonable. Seek urgent help for fever during treatment, severe pain, new lumps or any red-flag symptom your team has described.
Booking, referrals and fees
As a private specialist, Dr Ang can usually be seen without a referral, though a referral letter helps with background and with subsidy eligibility at public clinics. For eligible treatments and procedures, MediSave, MediShield Life and Integrated Shield Plans may apply within set limits, while consultations are generally out of pocket. Cancer treatment costs vary, so confirm fees and insurance coverage directly with the clinic before starting.
Common questions
Will I need chemotherapy for breast cancer?
Not always. Treatment depends on the tumour’s features and stage; options include hormonal therapy, targeted therapy and immunotherapy, sometimes alongside or instead of chemotherapy.
Why might genetic testing be discussed?
Some breast cancers are linked to inherited gene changes. Genetic counselling and testing can inform your treatment and help relatives understand their own risk.
What does young-onset breast cancer mean?
It refers to breast cancer diagnosed at a younger age, where considerations such as genetics and fertility may carry particular weight in planning care.
Will I see a surgeon as well?
Often, yes. Breast cancer is usually managed by a multidisciplinary team combining surgery, systemic treatment and sometimes radiotherapy.
Understanding breast cancer subtypes and treatment choice
Breast cancer is not a single disease, and treatment is shaped by the particular features of the tumour as much as by its size and spread. When a biopsy is examined, it is tested for hormone receptors and other markers that indicate how the cancer is likely to behave and which treatments may help. Hormone-receptor-positive cancers, for example, often respond to hormonal (endocrine) therapy, while other features may point towards targeted treatments or chemotherapy. This is why two people with breast cancer of a similar size can be offered very different treatment plans. Understanding that your plan reflects the specific biology of your tumour can make the recommendations easier to follow, and it is reasonable to ask your oncologist to explain what your tumour’s features mean for your options.
When inherited risk is part of the picture
For some patients, particularly those with a strong family history or a diagnosis at a younger age, an inherited predisposition may be considered. Genetic counselling and testing can clarify whether an inherited gene change is present, which can influence both treatment decisions and the management of risk for close relatives. Where this is relevant, the conversation usually involves dedicated counselling so that the implications, including for family members, are explained carefully. Bringing details of your family history of breast or related cancers to your appointment helps the team judge whether this discussion is appropriate for you.
Related guides
Sources & verification
See also: our editorial directory of cancer specialists (oncologists & haematologists) in Singapore and our shortlist of oncology clinics.
This is an independent, factual profile compiled from the public sources listed above — not a paid listing, advertisement or endorsement. Details can change; always verify a doctor’s current registration on the Singapore Medical Council public register and confirm specifics directly with the clinic. This page is general information, not medical advice or a recommendation of any individual practitioner. See our editorial policy.
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