Cancer Recurrence and Progression

The initial goal of cancer treatment is to achieve a cure whenever possible or, in some cases, to control the disease for as long as possible. This may involve a single treatment approach or a combination of surgery, radiotherapy, systemic therapies and immunotherapy, depending on the type and stage of cancer.

Although modern treatments are increasingly effective, some cancer cells may occasionally survive initial therapy. These cells can remain inactive for a period of time and later cause the disease to return. This is known as cancer recurrence.

Types of Recurrence

• Local recurrence: the cancer returns at or very close to the original site.
• Regional recurrence: the cancer returns in nearby lymph nodes or surrounding tissues.
• Distant or metastatic recurrence: the cancer returns in organs or tissues away from the primary tumour, such as the lungs, liver, bones or brain. In this situation, the disease is considered metastatic, although it retains the biological characteristics of the original cancer.

What Happens If Cancer Returns?

A recurrence does not necessarily mean that treatment options are no longer available. Many recurrences can be treated effectively using:

• Surgery.
• Radiotherapy.
• Chemotherapy.
• Hormone therapy.
• Targeted therapies.
• Immunotherapy.
• Combinations of several treatments.

The choice of treatment will depend on factors such as:

• The type of cancer.
• The location of the recurrence.
• The extent of the disease.
• Previous treatments received.
• The tumour's molecular characteristics.
• The patient's overall health.

Follow-up After Treatment

After treatment has been completed, international guidelines recommend an individualised follow-up programme. The main goals are to:

• Detect possible recurrence at an early stage.
• Identify second primary cancers.
• Monitor and manage long-term treatment effects.

Promote healthy lifestyle habits and improve quality of life.