Patients

This retrospective study included 52 patients with 65 unruptured aneurysms (UIA) located on ICA-C6 treated in 2009–2016. The mean patient age was 52.5 years (range: 26–76 years old). Forty-five (86.5%) patients were female. Four (7.7%) patients had a history of subarachnoid haemorrhage (SAH) from another aneurysm. Twenty-seven (51.9%) patients were smokers, 26 (50%) patients had arterial hypertension and 7 (13.5%) had a positive family history of intracranial aneurysms.

All study participants underwent regular, neurosurgical management and treatment. Afterwards, anonymized patient data was retrospectively analyzed by physicians who have access to patients’ medical records. The Bioethics Committee of the Medical University of Warsaw (local institutional review board) approved this study and waived the need for informed consent. Moreover, the study has been performed in accordance with the ethical standards as laid down in the 1964 Declaration of Helsinki.

The mean radiological follow-up was 12 months (range: 1 to 24 months), and the mean clinical follow-up was 61 months (range: 3 to 111 months). The follow-up data were available for all patients.