https://www.selleckchem.com/products/abt-199.html Of the six where parent vessel occlusion was done, one developed transient hemiparesis which recovered on follow-up and none developed significant disabling vision abnormality. No mortality was noted. Conclusion Aneurysms of the PCA are rare compared with other locations in the intracranial circulation. These aneurysms can effectively be treated by permanent occlusion of the parent artery even in this era of flowdivertors - however, in these cases, thorough knowledge of PCA segmental anatomy is crucial in order to select the site of occlusion and to avoid major neurological deficits.Introduction Pituitary adenomas comprise approximately 10% of all intracranial tumors. Initially, subtle changes occur in the field of vision, which are difficult to assess clinically. It has been seen that following surgery of pituitary macroadenoma, total recovery of normal vision occurs in 35% of the patients, improvement of vision occurs in 60%, and in the rest there is no change in vision. Retinal nerve fiber layer thickness (RNFLT) undergoes retrograde degeneration following compression of optic apparatus by pituitary tumor. We planned a study to evaluate RNFLT before and after pituitary adenoma surgery and its correlation with visual acuity. Material and Methods Twenty patients (40 eyes) with diagnosed pituitary adenoma were included in the study. Preoperative visual acuity, fundus and RNFL thickness were calculated using spectral-domain OCT Optovue, Heidelberg Engineering, Heidelberg, Germany (RT 100 version 5.1), and postoperative measurement was done after 1 and 3 months. Four-quadrant mean of RNFLT was calculated. Results were tabulated and analyzed. Statistical Analysis Results of the study were analyzed using IBM SPSS Statistics version 19.0. Results There was no significant change in RNFLT after pituitary adenoma surgery, and it was found that patients with RNFLT within normal range preoperatively showed improvement in visua