Bueno, I. A. F. (2017). Surviving cancer: the ego after the illness (Dissertação de Mestrado). Instituto de Psicologia, Universidade de São Paulo, São Paulo.Cancer is a disease of high impact on the lives of those who suffer and even among those who have overcome the treatment and find themselves established without risk of death. For the full understanding of what the disease triggers in human life, a study next to the disease survivors was needed. Considering the Analytical Psychology referential about psychic processes, the present work aims to understand the processes of the ego-complex of cancer survivors. The main objective of this research was to describe the processes and the nature of the ego-complex from cancer survivors. Secondarily, it was proposed to understand the impact that cancer disease provided on survivors, that is to say, the phenomenological consequences of the experience. The chosen method was clinical-qualitative, through the use of semi structured interview as a tool to approach the participants. Transferential and countertransferential aspects were also considered as a way to complement the analysis. It were interviewed men and women, who had breast and lung cancer. They were from 57 to 66 years old. All participants underwent surgical and other auxiliary treatment, such as chemotherapy or radiotherapy. The results indicate that the egocomplex is an important instance that organizes the subjects' lives, ensuring cohesion of personality, integrity, the maintenance of the continuity of lived events and identity. There are indications of important psychological changes after the end of cancer treatment. Nevertheless, the ego-complex requires contact with the other and the possibility of the experience of alterity in order to bring changes to strengthen the total development of the personality. The symbolic relationship with images that refer to a transcendent reality was intensified by the cancer experience, in which the ego seeks new meanings and sources of vitality to deal with its limitations. Participants used coping mechanisms such as support in medicine, music, health professionals, psychotherapy, religiosity and social support. The potential for psychological growth analogous to metanoia was verified, with a crisis of meaning of life based on adaptation to a life based on more personal values. There were strong indications of psychological transformations after the end of cancer treatment. In general, there was more appreciation of the physical, pleasureable and caring aspects of life, more importance to relevant affective relationships, devaluation of work, disinvestment on obligation roles, development of personality from diluted in massification to a more authentic singularity and also crises of roles whose ego-complex was largely identified. This research contributed to Analytical Psychology with more empirical evidences on the nature of the ego-complex, as well as more clarification about the psychic life and global changes after the end of the cancer treatment.