A closer look · Comparing treatment types
Different treatments. Different jobs.
Choose two approaches and compare how they act. Keep the treatment method separate from its aim and from the question of whether it is right for one person.
A comparison, not a treatment selector. Choose methods to understand the language. These selections do not recommend a treatment, rank its strength or show which combinations are appropriate.
Keep in mind
A useful question
Keep in mind
A useful question
The radiotherapy example is external-beam treatment. The medicine examples are systemic uses. Some medicines are delivered into a particular region, and some radioactive medicines work systemically; those approaches are not represented here.
Ask two separate questions
How does it act?
Local treatment acts in a particular area. Systemic medicines can reach cancer in different parts of the body, but that does not guarantee an effect at every site.
The categories are useful starting points, rather than perfect divisions. Some medicines fit more than one description.
What is it intended to achieve?
A plan may aim to cure cancer, reduce the chance of recurrence, control disease or relieve a symptom. The method’s name does not tell us the aim.
Combining approaches can be useful in particular settings, but needs evidence and an individual discussion of benefit, side effects and burden.
Read all six descriptions
Methods, limits and questions
Surgery
Local treatment
An operation removes cancerous tissue. The extent of the operation depends on the cancer, its location and the purpose of treatment.
Removing a tumour does not, by itself, tell us whether other treatment is needed or whether cancer can return.
Ask: What is the operation intended to achieve, and what might be needed afterwards?
External-beam radiotherapy
Local treatment
Radiation from a machine is directed at a planned area. Planning considers the target and surrounding normal tissues.
Local does not mean minor. The area, dose and schedule matter, and normal tissues can be affected. Radiotherapy can have different aims.
Ask: Which area is being treated, for what purpose, and which side effects matter for that area?
Systemic chemotherapy
Systemic treatment
Medicines interfere with cell growth and division. When given systemically, they can reach cancer cells in different parts of the body.
Healthy tissues can also be affected. The specific medicines and schedule matter; the word chemotherapy does not state the aim or likely benefit.
Ask: Which medicines are involved, what is the aim, and how will benefit and side effects be assessed?
Systemic immunotherapy
Systemic treatment
These treatments use the immune system to help attack cancer. There are different approaches; immune checkpoint inhibitors are one example.
It is not suitable for every cancer. Immune-related inflammation can affect healthy organs, including after treatment has finished.
Ask: Why might this approach help in this cancer, and which symptoms need prompt contact?
Systemic targeted therapy
Systemic treatment
Medicines act on particular features or processes involved in cancer growth. For some treatments, a relevant tumour test helps establish whether the medicine may be useful.
Targeted does not mean side-effect-free or cancer-cells-only. A biomarker does not guarantee a response, and not every change has a useful matching treatment.
Ask: Is a particular test needed, and what does its result mean for this treatment?
Hormone medicines
Systemic treatment
These medicines reduce hormone production or interfere with hormone effects in cancers whose growth is hormone-dependent.
They are useful in particular clinical settings, rather than for every cancer. They can have significant side effects and different treatment aims.
Ask: How does hormone sensitivity affect the plan, and what should I know about side effects?
Pause and consider
Does local treatment always mean curative treatment, while systemic treatment always means palliative treatment?
No. Local and systemic describe the approach or reach, rather than the aim. The aim must be explained separately for the particular cancer and plan.
Useful next reading
Sources & clinical review
Clinically reviewed and approved by Dr AlHilali on 4 November 2026.