Abstract: Introduction: Breast Cancer is in Portugal and in the world, the cancer with the highest incidence in women. Nursing care centered on the person and on the interpersonal relationship aims to help women to be proactive in achieving their health project. Faced with an event as disruptive as being diagnosed with Breast Cancer, the woman will need, through a therapeutic relationship, to be supported and taught in the adaptation and self-care strategies related to the emerging health deviation. Focusing on training for self-care through educational and support interventions, we selected the Nursing Theory of Self-Care Deficit developed by Dorothea Orem. The case refers to a woman who was 36 years old at the time of diagnosis (2014) with Multifocal Invasive Ductal Carcinoma Her2 like type.