What Is the Mind Doing While the Body Is Treated? 3rd-Wave Therapies in Cancer
In this article
Chemotherapy, targeted drugs, and surgery first come to mind when we think of cancer treatment. But as physicians, we know treatment is not limited to medicines given to the body. I often see this in clinical practice: While the body heals, the mind can fall behind. “What if the disease comes back?"—this fear and the anxiety of uncertainty can be as exhausting as the disease itself.
This is where approaches known in modern psychology as the "Third Wave" come in. Our clinical psychologist İnci Cengizprepared this article not only for our patients but also for their dedicated family caregivers, as a mental "guide to catching your breath" .
What does this article explain?
In language accessible to patients and families, it summarizes how ACT, MBCT, and MCT and other 3rd-generation therapies can help manage the fear, anxiety, and uncertainty that accompany cancer.
Why does it matter?
Because while medicine treats the disease, the mind tries to learn how to live with it. Rather than ignoring emotions, these therapies teach a healthier relationship with them, supporting inner strength on the path to recovery.
Cancer Treatment: Where Is the Mind While the Body Heals?
When medicine begins treating a disease, the mind tries to learn to live with it. A cancer diagnosis is exactly such a turning point. As the body enters a medical process, the mind is often left alone. Worries, "What if it happens again?" questions, sleepless nights, sometimes guilt, sometimes anger—all silently accompany this process.
These feelings often affect not only the patient but also loved ones waiting with bated breath . Third-wave cognitive behavioral therapies, increasingly used in psychology, address this need. Rather than forcibly changing thoughts, they aim to transform the relationship between a person and their thoughts.
1 • Acceptance and Commitment Therapy (ACT) — Acceptance and Commitment Therapy
"Moving Forward Despite Fear"
ACT focuses on recognizing, noticing, and accepting painful feelings and thoughts rather than suppressing them. The aim is not to eliminate emotions, but to maintain a meaningful life despite them.
How Does It Work?
- The person identifies valued areas of life, such as family, productivity, and hope.
- Even if fear or anxiety does not disappear completely, the person learns to act in line with those values.
ACT's basic philosophy is: "I am afraid, but I can still move forward."
Scientific studies show reduced stress, fear of recurrence, depression, and fatigue in cancer patients, along with improved treatment adherence.
2 • Mindfulness-Based Cognitive Therapy (MBCT) — Mindfulness-Based Cognitive Therapy
"Connecting With the Present Moment"
MBCT helps people connect with the present moment without being swept away by mental content. The goal is not to silence thoughts, but to observe them and let them come and go.
Where Does the Mind Go During the Cancer Journey?
- To the past: "If only it had been detected earlier…"
- To the future: "What if it returns? What will happen to my children?"
Instead of fighting these thoughts, mindfulness teaches people to see them as mental events passing like clouds .
Research shows that MBCT has positive effects on depression, anxiety, sleep disorders, and even the immune system.
3 • Metacognitive Therapy (MCT) — Metacognitive Therapy
"Being in Charge of Your Mind"
MCT focuses not on the content of a thought, but on the person's thoughts about their thoughts . The main issue is not the thought "what if something bad happens?" but the mental vicious cycle that develops while trying to control it.
Common Cycles During Cancer:
- Constantly scanning the body
- Interpreting every symptom as recurrence
- Spending hours reading worst-case scenarios online
MCT teaches people to view thoughts as mental events without becoming caught up in them. Worry cycles weaken, and the person gradually regains control of their mind .
Conclusion: Remembering Inner Strength on the Road to Recovery
These three approaches—ACT, MBCT, and MCT—share a principle: none ignores emotions or aims to suppress them. Instead, they teach a healthier relationship with feelings.
Cancer is difficult; denying this helps no one. Yet while coping with it, it is possible to:
- Listen to fear and still continue living,
- Learn to live with uncertainty,
- Find meaning even within pain.
These therapies may not erase all suffering, but by teaching people to cope with pain, they can help them reconnect with life more strongly . Sometimes the greatest change comes not from completely eliminating the disease, but from transforming our relationship with ourselves while living with it.
References
- Feros, D. L., Lane, L., Ciarrochi, J., & Blackledge, J. T. (2013). Acceptance and Commitment Therapy (ACT) for improving the lives of cancer patients: a preliminary study. Psycho-Oncology, 22(2), 459–464.
- Piet, J., Würtzen, H., & Zachariae, R. (2012). The effect of mindfulness-based therapy on symptoms of anxiety and depression in adult cancer patients and survivors: A systematic review and meta-analysis. Journal of Consulting and Clinical Psychology, 80(6), 1007–1020.
- Butow, P. N., et al. (2017). Randomized trial of ConquerFear: a novel, theoretically based psychosocial intervention for fear of cancer recurrence. Journal of Clinical Oncology, 35(36), 4066–4077.
- Garland, S. N., et al. (2007). A non-randomized comparison of mindfulness-based stress reduction and healing arts programs in a cancer centre. Supportive Care in Cancer, 15, 949–961.
- Wells, A., & Fisher, P. (2015). Treating depression using metacognitive therapy: A preliminary open trial. Cognitive and Behavioral Practice, 22(3), 262–270.
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