MATERIAL and METHODS: The patients over the age of 18 who were treated for posterior circulation aneurysm between January 2023 and January 2024 were evaluated. The patients" demographic data, radiological images, treatment approach, neurological examination findings before and after the treatment, Glasgow coma scores (GCS), post-treatment Glasgow outcome scores (GOS) and modified Rankin scores (MRS), and morbidity and mortality results were evaluated.

RESULTS: A total of 19 patients, consisting of 13 men and 6 women, aged between 24 and 80, with an average of 54.8 years, were included in the study. Ruptured aneurysms were detected in 10 of the patients and unruptured aneurysms in 9 patients. Before the treatment, GCS ranged between 3 and 15, and the average was 9.8 in the ruptured group and 15 in the unruptured group. Microsurgery was performed on 1 patient and endovascular surgery was performed on 18 patients. The mortality rate was 60% (6 patients) in the ruptured group and 11% (1 patient) in the non-ruptured group. In the 4 patients in the ruptured group who had no mortality, the average post-treatment MRS was 0.5 and GOS was 1.25. In patients with unruptured aneurysms, MRS was 0 and GOS was 1, except for 2 patients with fusiform aneurysms in the basilar artery.

CONCLUSION: In this study, mortality was found to be higher in patients with ruptured aneurysms and was consistent with the literature. A low pre-treatment GCS was found to be a predictor in terms of prognosis and mortality in these patients. In the unruptured group, mortality and morbidity were found to be higher in aneurysms that were large and caused brainstem compression, such as fusiform aneurysm in the basilar artery. Anahtar Kelimeler : Intracranial aneurysm, Posterior circulation, Endovascular procedures, Microsurgery, Patient selection