Background/Aim: The effect of surgical intervention on the quality of life and survival of patients presenting with metastatic breast cancer is a controversial issue. In this study, we aimed to reveal the survival, clinical, and pathological differences in patients with breast cancer who had metastatic disease at diagnosis and who underwent and did not undergo surgery for the primary tumor in our clinic and to evaluate the efficacy of surgical approach on the course of the disease. Methods: In this retrospective cohort study, the data of patients with metastatic breast cancer in our clinics between January 2000 and June 2021 were retrospectively analyzed. The study included those with primary metastatic disease. The study did not include male patients, patients with primary non-breast tumors, those who died of causes unrelated to breast cancer, those who underwent surgery for metastatic foci other than the primary tumor, and those who could not be followed up regularly for various reasons. In our study, there were two groups; those who received only systemic therapy were assigned to Group 1, while those who underwent surgical treatment for the primary tumor were assigned to Group 2. The clinicopathological and survival data of the groups were examined. Results: Surgical intervention was performed on 62 of our patients. The 4-year survival rates were higher than those who did not undergo surgery (Group 1: 59.6 [14.7%], Group 2: 83.5 [6%]). The comparison of the two groups showed a longer median survival in patients in Group 2 who underwent surgery, albeit not statistically significant (77 [11.23] months in Group 1 and 84 [18.91] months in Group 2 [P=0.16]). Conclusion: In conclusion, our study showed that surgical treatment may have positive effects on survival.

Objective: Position changes and increased intra-abdominal pressure in laparoscopic interventions lead to some physiopathological changes. There is no definite information in the literature regarding cerebral oxygen saturation in patients undergoing colorectal surgery. Our aim was to investigate whether there is oxygen saturation change in the brain tissue in pneumoperitoneum and the Trendelenburg position during laparoscopic rectal surgery. Material and Methods: Cerebral oxygen saturation was measured in 35 patients who underwent laparoscopic rectal surgery in the Trendelenburg position. Measurements were made under general anesthesia in the pneumoperitoneum and the Trendelenburg position. Results: The values that are statistically affected by the position are systolic blood pressure, mean arterial blood pressure and cerebral oxygen saturation. The Trendelenburg position does not disturb the cerebral oxygen saturation and it causes an increase in saturation. After pneumoperitoneum occurred, changes in systolic blood pressure, mean arterial blood pressure and brain oxygen saturation were detected. Cerebral oxygen saturation increases with the formation of pneumoperitoneum. Conclusion: The Trendelenburg position and increased intraabdominal pressure during laparoscopic rectal surgery do not impair brain oxygen saturation.

Objectives: Although there have been several advances in post-solid organ transplantation immunosuppression medications over the last two decades, the long-term survival of renal allografts did not significantly improve. Renal allograft biopsy is a helpful tool for determining the cause of graft dysfunction and adjusting patient management. Methods: Patients who received kidney transplantation and underwent allograft biopsy in Istinye University Hospital between January 2017 and January 2023 constituted the target population of this study. Demographic parameters, clinical data and biopsy indications, and histopathological assessment results of the patients were retrospectively analyzed. Results: Overall, 74 patients were included. The histopathology results included acute T-Cell mediated rejection (TCMR) (n = 15, 20%), tubular atrophy/chronic allograft nephropathy (IFTA) (n = 11, 15%), calcineurin inhibitor (CNI) toxicity (n = 2, 3%), chronic antibody-mediated rejection (ABMR) (n = 2, 3%), borderline pathology (n = 10, 13.5%), normal histology (n = 5, 6.5%), transplant glomerulopathy (TG) (n = 5, 6.5%), acute ABMR (n = 4, 5%), acute tubular necrosis (n = 7, 9%), polyomavirus nephropathy (n = 3, 4%) and non-specific changes (n = 10, 13.5%). The C4d was positive in 12% (n = 9) of the graft biopsies. In 73% (n = 54) of cases, the treatment strategy was changed based on biopsy results. Among all patients, 19 (25.6%) lost their grafts during follow-up. Conclusions: According to the histopathological analysis results, acute TCMR, IFTA, and borderline pathology were the most common causes of renal graft dysfunction. Renal allograft biopsy led to a remarkable change in treatment strategies in a significant number of cases.