SUPPLEMENT ABSTRACTS BPOS Poster Presentations Exercise, body image issues and masculinity in prostate cancer (PCa): comparing PCa patients undergoing androgen deprivation therapy (ADT) to ADT-naïve PCa patients and age-matching controls Caterina Gentili 1 ; Stuart McClean 2 ; Lucy Hackshaw-McGeagh 3 ; Amit Bahl 4 ; Raj Persad 5 ; Diana Harcourt 1 1 Centre for Appearance Research, University of the West of England, Bristol, UK; 2 Centre for Public Health and Wellbeing Research, University of the West of England, Bristol, UK; 3 NIHR Bristol Biomedical Research Centre, Bristol, UK; 4 University Hospitals Bristol NHS Trust, Bristol, UK; 5 North Bristol NHS Trust, Bristol, UK Background: Androgen Deprivation Therapy (ADT) is a well- established treatment for prostate cancer (PCa). Side effects, which can affect appearance and masculinity, might be counterbalanced by exercise. Despite its physical and psychological benefits, exercise rates among PCa patients are low. Aims: This study investigated the association between body image issues and exercise in patients on ADT. We hypothesized that: 1. Patients on ADT will present higher body image concerns, fear of negative appearance (FNAE) and physical performance evaluation (FNPPE), masculinity issues, and lower functionality appreciation when compared to ADT-naïve patients and controls. 2. Considering only patients on ADT, FNAE and FNPPE will predict higher masculinity issues, body image concerns, and lower functional- ity appreciation. These relationships will be mediated by low exercise frequency. Methods: 60 PCa patients undergoing ADT, 60 ADT-naïve patients, and 60 age-matching cancer-free men completed a questionnaires package online. H1 was tested with a MANOVA and H2 with linear regressions. Results: We found no significant difference between groups on any of the outcomes (p = 0.28). In the ADT group, FNAE and FNPPE sig- nificantly predicted body image concerns (p<.001) and masculinity issues (p < .001), but were not associated with functionality apprecia- tion (p = .66, p = .34). None of these relationships were mediated by exercise. Conclusions: The results suggest that ADT is not associated with ++ negative body image. Future research should investigate the protec- tive factors preventing body image issues in PCa. FNAE and FNPPE predicted poorer body image outcomes but exercise frequency did not contribute to this relationship. Future research should further explore exercise barriers in PCa. A life interrupted: An interpretative phenomenological analysis of young people and their family/significant other living with malignant melanoma Wendy McInally Edinburgh Napier University, Edinburgh, UK Background: Incidence of malignant melanoma is increasing interna- tionally. In the United Kingdom, it is the fifth most common cancer among young people, and in Scotland, 14 young people aged 15 to 24 years are diagnosed with the disease each year. Despite improve- ments in survival rates, prognosis is known to be poor if diagnosis is delayed. However, there is little international evidence around the experiences of young people living with malignant melanoma and that of their family/significant other. Aims: To explore the experiences of young people and their family/significant other living with malignant melanoma within Scotland. Methods: A qualitative exploratory study was conducted, underpinned by Interpretive Phenomenological Analysis (IPA). Due to the relatively small numbers of young people in Scotland diag- nosed with malignant melanoma each year, five young people were purposively sampled from three National Health Service Boards across Scotland based on where they were receiving treatment. Each young person and a family/significant other nominated by them were interviewed (n = 10) either individually (n = 4) or as a dyad (n = 6). Results: Data analysis suggests that four major super-ordinate themes encapsulate the experience of young people living with malignant melanoma and that of their family/significant other: (1) ‘Is it Serious’, (2) ‘Too Much too Young’, (3) ‘Not the Same’, (4) ‘Time to Live’. Conclusions: Despite the seriousness of the disease and growing numbers there were reasons to suggest that young people and their family/significant other may be experiencing fragmented services, insufficient support, leading to poorer experiences of living with this cancer. DOI: 10.1002/pon.5335 ©2020 The Authors. Psycho‐Oncology © 2020 John Wiley & Sons, Ltd. 10 Psycho-Oncology. 2020;29(S2):10–25. wileyonlinelibrary.com/journal/pon