Skip to main content
Step 5

When and why therapy is changed

Therapy change for advanced breast cancer
Therapy is changed when it is assessed that the disease is active again or when are too severe despite adjustments. The decision is based on scans (usually ), symptom assessment, , and your quality of life. Sometimes a is done to check and consider new options (e.g., ).
Signs of progression (disease advancement)

New changes on scan or enlargement of existing ones (according to ), worsening symptoms (e.g., stronger pain, cough, difficulty breathing), rising trend of tumor markers together with clinical picture.

Intolerance despite adjustments

Severe that disrupt daily life or safety, despite dose reduction/breaks and treatment – then therapy is changed.

Sometimes – repeat biopsy

If accessible and safe, a of the is repeated to check and other markers. The result may open new treatment options.

What does transition (switching to another therapeutic option) look like

The doctor plans stopping the old and starting the new (sometimes with a short break). You receive instructions on preparation, premedication, and first check-ups.

Goal of the change

Renewed disease control and symptom relief with the best possible quality of life. is part of the plan at every stage.

Safety and preparation

Blood count check before starting therapy. If needed, advice on nutrition and activities – all for easier tolerability.

First months of new therapy

Early check-ups and scans per plan (often at 8–12 weeks) to assess whether the new therapy is working and how you are tolerating it.

Does a marker "spike" mean automatic change?

Not always. Trends over time are observed and confirmed with scans and symptoms. The decision is never based on one finding alone.

When to seek help immediately, without waiting for an appointment?

  • Sudden severe pain, difficulty breathing, chest pain.
  • High fever or signs of infection.
  • Neurological symptoms (weakness, tingling, speech/vision disturbances).
  • Severe side effect of new therapy (allergic reaction, heavy bleeding, etc.).

What is "disease progression"?

Progression means the disease has grown or spread. This is usually confirmed by comparing scans (e.g., ) according to criteria, along with assessment of symptoms and laboratory.

Role of supportive treatment

Supportive care means pain reduction, help with nutrition, psychological support and . It is not giving up on treatment but an important part of care at every stage.

Your role in the decision

  • Tell your doctor what matters to you (symptoms, daily life, goals).
  • Ask questions about benefits and risks of new therapy.
  • Save and bring all new findings to every check-up.
  • You have the right to participate in choosing your therapy among multiple options if they exist.