Structural equation modeling of the relationship between posttraumatic growth and psychosocial factors in women with breast cancer.

OBJECTIVE: Posttraumatic growth (PTG) is a positive psychological change occurring after struggling with a highly challenging experience. The purposes of this study were to investigate how women's demographic and clinical characteristics as well as psychosocial factors are associated with PTG and to reveal the influence of PTG on depressive symptoms. METHODS: Participants were 157 women with breast cancer (BC) who attended a breast oncology clinic at a university hospital in Japan. The questionnaire included demographic and clinical characteristics, social support, coping strategies, depressive symptoms, and PTG. Structural equation modeling was conducted. RESULTS: Coping was directly related to PTG, and social support and having a religion were partially related to PTG. There was a moderate association between social support and coping. PTG mediated the effect of coping on depressive symptoms. PTG as well as a high level of perceived social support and using positive coping decreased depressive symptoms, whereas using self-restraining coping increased depressive symptoms. CONCLUSION: This study indicated the role of coping strategies and social support in enhancing PTG in Japanese women with BC. Furthermore, perceived social support, a positive approach coping style, and PTG may reduce depressive symptoms. Our results suggest that health care professionals should consider whether patients receive enough support from others, and whether the patients are using the appropriate coping style to adapt to stressors associated with the diagnosis and treatment of BC.

Utility of FDG-PET/CT in the evaluation of the response of locally advanced breast cancer to neoadjuvant chemotherapy.

Neoadjuvant chemotherapy (NAC) is effective in down-staging a primary tumor before surgery, and quick differentiation between responders to NAC and nonresponders is needed. We investigated the utility of [18F]fluorodeoxyglucose positron emission tomography (FDG-PET) and computed tomography (CT) in evaluating the therapeutic effectiveness of NAC. We investigated 25 patients who underwent NAC for stage II and III noninflammatory breast cancer. FDG-PET/CT was undertaken before and after NAC to determine the maximum standardized uptake value (SUVmax) reduction rate. Findings were compared with postoperative histopathologic evaluation of therapeutic response. It was not possible to accurately assess tumor response to NAC using CT. However, using the SUVmax reduction rate, we noted a significant difference (P=0.0420) between patients who were responsive and nonresponsive to NAC. The sensitivity and specificity were as high as 83.3% and 78.9%, respectively. This study demonstrated that FDG-PET/CT can differentiate responders from nonresponders. This improves patient management by avoiding unnecessary chemotherapy.