ABSTRACT
BACKGROUND: The role of neoadjuvant stereotactic body radiation therapy (SBRT) in the treatment of pancreatic adenocarcinoma (PDAC) is controversial and the optimal target volumes and dose-fractionation are unclear. The aim of this study is to report on treatment outcomes and patterns of failure of patients with borderline resectable (BL) or locally advanced (LA) pancreatic cancer following preoperative chemotherapy and SBRT. METHODS: We conducted a single-institution, retrospective study of patients with BL or LA PDAC. Patients received neoadjuvant chemotherapy and SBRT was prescribed to 30 Gy over 5 fractions to the pancreas planning tumor volume (PTV). A subset of patients received a simultaneous integrated boost to the high risk vascular PTV and/or elective nodal irradiation (ENI). Following neoadjuvant chemoradiation, all patients underwent subsequent resection. Overall survival (OS), progression-free survival (PFS), locoregional recurrence-free survival (LRRFS), distant metastasis-free survival (DMPFS), and locoregional control (LRC) estimates were obtained using Kaplan-Meier analysis. RESULTS: Twenty-two patients with BL (18) or LA (4) PDAC were treated with neoadjuvant chemotherapy and SBRT followed by resection from 2011-2022. Following neoadjuvant treatment, 5 patients (23%) achieved a pathologic complete response (pCR) and 16 patients (73%) had R0 resection. At 24 months, there were no isolated locoregional recurrences (LRRs), 9 isolated distant recurrences (DRs), and 5 combined LRRs and DRs. Two LRRs were in-field, 2 LRRs were marginal, and 1 LRR was both in-field and marginal. 2-year median LRC, LRRFS, DMPFS, PFS, and OS were 77.3%, 45.5%, 31.8%, 31.8%, and 59.1%, respectively. For BL and LA cancers, 2-year LRC, DMPFS, and OS were 83% vs. 75%, (p = 0.423), 39% vs. 0% (p = 0.006), and 61% vs. 50% (p = 0.202), respectively. ENI was associated with improved LRC (p = 0.032) and LRRFS (p = 0.033). Borderline resectability (p = 0.018) and lower tumor grade (p = 0.027) were associated with improved DMPFS. CONCLUSIONS: Following preoperative chemotherapy and SBRT, locoregional failure outside of the target volume occurred in 3 of 5 recurrences; ENI was associated with improved LRC and LRRFS. Further studies are necessary to define the optimal techniques for preoperative radiation therapy.
ABSTRACT
Ruminative thought patterns, defined as repetitive negative self-focused attention, are considered an avoidant coping strategy for managing stress. As trans and nonbinary (TNB) individuals commonly experience prejudice and discrimination in response to their gender identities (i.e. minority stressors), rumination over these stressors may contribute to heightened risk of psychopathology in these groups. Although rumination is a general risk factor for eating disorder (ED) psychopathology, no studies to date have examined whether eating- or gender-related ruminative patterns relate to maintenance of ED psychopathology for TNB individuals. This cross-sectional study investigated whether levels of rumination (both gender-related and ED-specific) mediated the relationship between minority stress and ED psychopathology. METHOD: Participants were 242 TNB adults (Mage = 24.92, SD = 6.5, Range = 18-70) recruited online, who completed measures of minority stress, gender-related rumination, ED-specific rumination, and ED psychopathology. We used Preacher-Hayes' approach to examine the parallel mediation model, with gender-related and ED-specific rumination as potential mediators. RESULTS: Gender-related rumination did not mediate the relation between gender minority stress and ED psychopathology, Indirect B = -0.00 [95% BCa CI: -0.01, 0.00]; however, ED-specific rumination was significant, indicating partial mediation, Indirect B = 0.01 [95% BCa CI: 0.00, 0.02]. CONCLUSION: As gender minority stress and ED-specific rumination relate to ED psychopathology, it is essential that clinicians adopt an intersectional minority stress framework in understanding ED psychopathology among TNB individuals.
