Thesis (MEdPsych (Educational Psychology)--University of Stellenbosch, 2009. / This study focused on South African siblings' experiences of a brother or sister with cancer. Social constructionism was used as an epistemological framework. Three in-depth interviews with siblings (ages 12 – 16 years) of pediatric cancer patients, were done. The case study approach was chosen as the most suitable method to gain the information. The thematic content analysis was the method of analysis. Participants' experiences with regard to their siblings' cancer were reconstructed according to themes. Recurring themes were elucidated and linked with the literature. The study allowed participants to express their conscious and unconscious experiences by means of verbal and non-verbal (art activities) communication. Results support the concern by previous studies about siblings' vulnerability since the diagnosis of a brother's/sister's cancer. The uniqueness of each sib's experience and the implementation of individualy-centered intervention strategies is emphasized. Educational Psychologists as well as members of the multidisciplinary team (teachers, medical and nursing staff, parents, family and peers) interested in supporting siblings of pediatric cancer patients can benefit from this study.