The integrated model of psychological support for children undergoing chemotherapy is based on the principle that effective care of a child with cancer is not limited to disease control and management of physical complications, but also requires simultaneous attention to his emotional, cognitive, behavioral, family, social, and developmental needs. Cancer diagnosis and the beginning of chemotherapy can change the structure of the child's and family's life and provide psychological vulnerability by creating anxiety about the future, fear of medical procedures, changes in social relationships, limitation of daily activities, and increased dependence on caregivers. In such a situation, psychological support will be most effective when it is systematically, continuously, and coordinated between the psycho-oncology, family, and members of the treatment team. The integrated model is not meant to be a set of scattered services or individual interventions, but rather a coordinated framework in which psychological needs assessment, intervention planning, support implementation, change monitoring, and expert referral are linked to each other. This model is inspired by the biological, psychosocial perspective and considers illness as a phenomenon whose consequences are influenced by the interaction between physical status, emotional experiences, cognitive perceptions, family relationships, and social conditions. According to this viewpoint, child anxiety cannot be considered as an individual reaction to the disease, because the intensity of pain, complications of chemotherapy, the quality of communication with the treatment staff, the reactions of parents, and the amount of social support also play a role in its formation and persistence. Therefore, the design of a support program should be based on recognizing the specific characteristics of each child and his life conditions and avoiding providing a fixed prescription for all patients. At the center of this model, the psycho-oncist, as a mental health specialist in the field of cancer, is responsible for a comprehensive assessment of psychological distress, identifying risk factors and sources of support, formulating intervention goals, and coordinating psychological services. The specialist should assess the child's emotional state, perception of the disease, previous medical experiences, coping styles, quality of family relationships, and treatment-related concerns before starting chemotherapy or at the earliest appropriate opportunity. The initial assessment should be done in accordance with the child's age, stage of development, verbal ability, and physical condition, as the way distress manifests in young children may differ from that of older children. In young children, fear and anxiety may manifest more through crying, restlessness, clinging to parents, sleep disturbances, or resistance to medical procedures, while older children may express concerns about pain, change in appearance, separation from friends, school, or the future. Therefore, the psycho-oncologist should use clinical observation, family reporting, and, if needed, validated screening tools, in addition to age-appropriate dialogue. The results of the assessment serve as the basis for determining the level of support needed and determine whether psychological education and general support are adequate or if the child needs specialized interventions and continuous follow-up. In this framework, the role of the psycho-oncologist is not limited to reducing anxiety, but also includes strengthening emotion regulation, developing coping skills, increasing the sense of security, maintaining age-appropriate independence, and helping the child adapt to the changes caused by the disease. To achieve these goals, methods such as psychological readiness training before medical procedures, age-appropriate cognitive behavioral interventions, relaxation exercises, mental imagery, play therapy, art activities, and problem-solving skills training can be used based on the child's needs. The choice of any method should be made according to the child's clinical situation, preferences, facilities at the treatment center, and the specific goal of the intervention. For example, a child who is afraid of injections and observation of medical equipment may benefit from gradual familiarity with the steps of action, medical play, and practice of distraction techniques, while a child who is concerned about changing appearance or staying away from peers may need more emotional support, body image conversation, and social connection. In this model, the family is considered the second essential pillar of psychological support, because parents and close caregivers form an important part of the child's emotional environment and play a major role in soothing, preparing and helping to manage his emotions in many therapeutic situations. However, parents are also exposed to psychological pressures caused by a cancer diagnosis, worries about the outcome of treatment, observing the child's physical complications, and financial and care difficulties. Severe anxiety, sleep deprivation, burnout, and feelings of helplessness may reduce their capacity to respond calmly and steadily to the child's needs. For this reason, parental support should not be seen as a by-step, but should have a specific place in the comprehensive psychological care program. A psycho-oncologist can strengthen the family's coping resources by psycho-educating the child about natural reactions to illness, strengthening emotion regulation skills, teaching effective communication with the child, and identifying signs of caregiver burnout. Parents should learn not to deny the child's fear and discomfort, to provide a safe space to express his feelings, and to provide honest and age-appropriate explanations instead of unrealistic promises. For example, if a child is concerned about the pain of a medical procedure, the appropriate response is not to definitively promise that no discomfort will occur, but to explain what might be felt, what steps can be taken to reduce the discomfort, and how the child can seek help. Such communication can maintain a child's trust and reduce the likelihood of experiencing feelings of being deceived. The family can also help maintain a sense of identity and belonging by maintaining normal activities that are appropriate to the child's physical condition, such as playing, reading, connecting with friends, and doing activities of interest. At the same time, it is necessary for parents to avoid excessive care or unnecessary limitation of the child's autonomy and to provide him with the opportunity to choose and participate within a safe range. The child's participation in the choice of daily activities, the type of hobbies, or the way he receives support can increase the sense of perceived control, without delegating responsibility for medical decisions. The third pillar of this model is the multidisciplinary treatment team, which includes the pediatric oncologist, nurses, psychologist or psycho-onclogist, social worker, rehabilitation specialists, and other relevant members. Each of these individuals encounters aspects of the child's experience from the perspective of their expertise, and coordination between them can prevent the dispersion of services, unnecessary repetition of evaluations, and ignoring psychological needs. By clearly explaining the treatment process and paying attention to the questions of the child and the family, the nurse plays a role in reducing ambiguity and strengthening trust. The nurse also has a valuable opportunity to observe behavioral changes and identify signs of distress due to frequent communication with the child in the stages of preparation, injection, monitoring of complications, and daily care. The psycho-oncologist can provide care-related psychological findings within the framework of confidentiality principles and with the necessary consents to the relevant team members to make the treatment plan more aligned with the child's needs. The social worker can also identify social factors affecting distress by examining economic problems, family support needs, access to services, and barriers to regular attendance at therapy sessions. In the meantime, a clear division of responsibilities is important; team members should know who is responsible for screening for distress, following up on referrals, communicating with family, and evaluating the results of interventions. Holding case coordination meetings, recording essential information in the file, and setting specific referral routes can increase the coherence of services. Of course, team coordination should not mean an unlimited exchange of private information between the child and the family; information should only be shared within the limits of professional necessity and in accordance with confidentiality standards. An integrated model is most effective when psychological support is present at all stages of the treatment path, rather than simply starting after severe problems have arisen. In the pre-chemotherapy phase, initial assessment and age-appropriate education can help identify concerns, prepare the child, and reduce ambiguity. At this stage, the family should receive the necessary information about the child's possible reactions, how to respond to questions, and when to seek professional support. When administering chemotherapy, it is important to pay attention to the child's symptoms of anxiety, pain, fatigue, and communication needs, and short, flexible interventions can be implemented according to his or her situation. In the intervals between sessions, monitoring the psychological status, examining sleep and behavior problems, assessing the experience of complications, and supporting the family make it possible to identify problems early. If severe or persistent symptoms occur, the support plan should be reviewed and, if necessary, additional specialized services should be considered. This continuity of care is particularly important, as the child's distress may change at different stages of treatment and may depend on previous experiences, physical complications, the results of medical evaluations, or changes in family circumstances. One of the fundamental principles of the model is the use of shared decision-making and participation appropriate to the child's age. The child should have the opportunity to ask questions, express his feelings, and comment on the areas of care in which he or she can choose. A child's participation does not mean imposing adult responsibility, but rather recognizing their developmental capacities and their right to understand and participate in the experience of therapy. For example, a child may be able to choose between two relaxation activities or decide to listen to a story or draw while waiting. These small choices can foster a sense of authority and improve therapeutic communication. Along with that, the family and the treatment team should coordinate about the information that is presented to the child so that conflicting or ambiguous messages do not increase their concern. The content of the explanation should be in line with the child's level of understanding and allow for more questions to be asked at later times. From an applied perspective, the implementation of this model requires a systematic process of screening, evaluation, intervention, and follow-up. At the initial screening, symptoms such as severe anxiety, low mood, fear of medical procedures, sleep problems, behavioral changes, and disruption in daily functioning are examined. Then, based on the severity and nature of the problems, the appropriate level of support is determined. Children with mild and transient distress may benefit from appropriate information, family support, and brief interventions, while severe or persistent distress requires specialist assessment and a targeted treatment plan. This phased approach helps to allocate limited resources of mental health services to needs while ensuring that no child is deprived of primary support simply because they have no obvious symptoms. Monitoring outcomes should also be part of the model and not limited to family satisfaction with services. Changes in distress levels, quality of life, ability to express emotions, sense of security, child's involvement in care, quality of family relationships, and access to support services can be considered as assessment indicators. Where possible, information is collected from multiple sources, including the child, parents, and relevant members of the treatment team, to get a more comprehensive picture of the situation. However, the difference in perspective does not necessarily mean that one of them is at fault; the child may experience anxiety that is not evident in their outward behavior, or parents may notice symptoms that are less common in the hospital setting. Therefore, the interpretation of information should be done according to the context and characteristics of each resource. The implementation of the integrated model is also associated with limitations. The shortage of child psycho-oncology specialists, time constraints in treatment centers, the workload of nurses, the cost of services, geographical distance, and the difficulty of following up on families may make it difficult to continue interventions. In addition, cultural, linguistic, and family differences can affect the way emotion is expressed, the acceptance of psychological support, and the perception of illness. Some families may view a visit to a mental health professional as a sign of weakness or think that focusing on psychological issues diminishes the importance of medical treatment. To reduce these barriers, it is necessary to introduce psychological support as a natural part of comprehensive cancer care and provide short, accessible training for family and treatment team members. The use of in-person counseling when appropriate, the design of clear referral pathways, and the integration of psychological screening into the routine process of care can help increase accessibility, although these methods should be chosen according to technological possibilities, confidentiality, and clinical circumstances. Another limitation is the risk of turning the integrated model into a series of administrative procedures without real communication between professionals. Taking forms or holding coordination meetings alone does not guarantee the quality of support; what matters is the use of information for clinical decision-making, responsible follow-up, and adjustment of the program based on the child's needs. Also, the implementation of this model should not be expected to eliminate all symptoms of anxiety or ensure a clear medical outcome. Its realistic goal is to identify problems in a timely manner, reduce manageable distress, strengthen coping resources, and improve the quality of the child and family experience in the course of treatment. For the scientific development of this model, it is necessary to conduct studies that investigate the feasibility of implementation, acceptance of families, quality of team collaboration, cost of services, and psychological outcomes. Longitudinal studies can clarify whether continuity of support at different stages of treatment is associated with a sustained improvement in the child's adjustment, quality of life, and social functioning. Also, investigating the differences in the needs of children at different ages and paying attention to the situation of families with limited support resources can help to design models that are more appropriate to the real conditions of health centers. Finally, the integrated model of psychological support for children undergoing chemotherapy is based on continuous collaboration between the psycho-oncology, the family, and the treatment team, and strives to address the physical and psychological needs of the child in a coordinated framework. The psycho-oncologist has complementary responsibilities in this process by specializing in the evaluation and design of interventions, the family by providing security and emotional support, and the treatment team by providing informed medical care and effective communication. The effectiveness of this collaboration depends on the clarity of roles, professional communication, attention to confidentiality, age-appropriate participation of the child, and continuous follow-up. Rather than focusing solely on reducing symptoms, such a model emphasizes the preservation of the child's dignity, strengthening the sense of security, increasing the ability to cope, and supporting the continuity of life in accordance with the conditions of the disease. In this framework, the child is not only the recipient of treatment, but also an active member of the care process, whose feelings, preferences, developmental needs, and right to participate should be taken into account in decisions related to psychological support. Accordingly, service integrity is realized when psychological care is pursued from diagnosis to the end of treatment and subsequent follow-ups in a flexible, continuous, and tailored manner to the needs of the child and the family.