The cooperation of a psycho-oncologist and an oncologist in the management of psychological complications caused by chemotherapy, radiation therapy, and systemic therapies is one of the important components of integrated care in cancer, because anti-cancer treatments, in addition to tumor control, can be associated with physical changes, sleep disturbances, fatigue, nausea, pain, changes in appearance, decreased function, and in some patients, cognitive and emotional changes, and these factors in turn affect anxiety, depression, body image, self-efficacy, and quality of life. In this collaboration, the oncologist is responsible for assessing the medical condition, type of treatment, drug and radiation side effects, and physical symptoms, and the psycho-oncologist focuses on identifying and managing psychological, emotional, cognitive, and behavioral outcomes. The strength of this collaboration is that the patient's symptoms are not reduced to mere "psychological complications" or merely to "physical complications", but are examined in his clinical and individual context.
In chemotherapy, waiting to receive treatment, experiencing nausea and vomiting, fatigue, changes in appetite, hair loss, and recurring treatment sessions can be associated with anticipatory anxiety and increased distress. Some patients experience symptoms of anxiety or nausea even before they go to a treatment center, observing the environment or equipment associated with chemotherapy. The oncologist and treatment team must investigate and manage the physical and pharmacological factors affecting these symptoms, and the psycho-oncologist can help reduce anxiety and improve coping skills by using education, relaxation, cognitive restructuring, attention regulation techniques, imagery, and other evidence-based interventions.
Radiation therapy may also be associated with fatigue, skin changes, local pain or discomfort, functional changes, and concerns about the effect of treatment on the body. Prolonged treatment and frequent visits to a radiation therapy center can create feelings of exhaustion and limitations in daily life. The psycho-oncologist can provide appropriate interventions by assessing distress, concerns about the body and the future, sleep quality, and adaptation to the treatment process. In patients where physical or physical changes have caused a decrease in self-confidence, interventions based on body image, self-compassion, and cognitive restructuring can be used in conjunction with medical care. In this process, regular communication with the oncologist is essential so that psychological interventions are aligned with the patient's physical condition and treatment limitations.
Systemic therapies such as targeted therapies, hormone therapy, and immunotherapy also each create a different pattern of psychological complications and needs, and not all patients should be evaluated with the same consistent pattern. Changes in energy, sleep, physical function, concerns about the effectiveness of treatment, or long-term experience of taking medication can affect psychological adjustment. The psycho-oncologist in this situation should make an appropriate clinical distinction between primary psychological symptoms and secondary reactions to physical condition and report any new or unusual symptoms to the medical team. On the other hand, the oncologist should be aware that severe distress, anxiety, or depression may affect the quality of life, the patient's participation in treatment, and their ability to manage complications.
Regular distress assessment is one of the foundations of this collaboration. The use of valid screening tools can help to quickly identify patients who require specialist evaluation, but the outcome of the screening should be interpreted alongside the clinical interview and medical conditions. The assessment should not be done only at the beginning of treatment, as the patient's psychological status may change during chemotherapy, radiotherapy, or systemic therapy. The time of initiation of treatment, periods of exacerbation of complications, change of treatment regimen, end of active treatment, and follow-up period can be important points for re-evaluation. This continuous monitoring allows the intervention to begin before manageable distress turns into a more severe problem.
Psychological therapy can include psychological education, cognitive-behavioral therapy, emotion regulation skills, mindfulness, relaxation, acceptance and commitment-based interventions, supportive therapy, and, in appropriate cases, meaning-based interventions. In patients with severe anxiety, it is important to focus on identifying catastrophic thoughts, reducing avoidance, and training coping skills. In patients with depression, behavioral activation, correction of dysfunctional thoughts, and strengthening social support may be considered. In body image problems, interventions should focus on accepting changes, rebuilding identity, and reducing negative self-evaluation. If severe or complex symptoms are present, collaborating with a psychiatrist to assess the necessity of pharmacological treatment will also be part of comprehensive care.
Communication between members of the treatment team in this model should be two-way. The psycho-oncologist needs to communicate important psychological and behavioral changes to the medical team, and the oncologist should provide the mental health professional with information related to treatment changes, new complications, or medical limitations. Such communication avoids conflicting recommendations and increases the possibility of personalizing the intervention. Family involvement can also be helpful if the patient is satisfied, especially when the patient needs practical and emotional support to manage complications or visit therapy regularly.
The main challenge in this area is the overlap of physical and psychological symptoms; for example, fatigue, sleep disturbances, loss of appetite, or concentration problems may be caused by both treatment and illness and may be associated with anxiety or depression. Also, the severity and type of complications vary from patient to patient, and a single protocol may not be suitable for everyone. Limited access to psycho-oncology services, lack of time in treatment facilities, stigma associated with receiving psychological services, and lack of regular referral routes can also make it difficult to implement integrated care. Therefore, the collaboration between the psycho-oncologist and the oncologist should go beyond a simple referral and become an ongoing process of screening, joint evaluation, goal setting, intervention, monitoring, and review. Ultimately, managing the psychological complications of cancer treatment will be more effective when physical and psychological symptoms are seen side by side and the patient is at the center of a program that tracks both disease control and treatment complications as well as their mental health, adaptability, functioning, and quality of life.