, Volume 22, Issue 4, pp 397–404 | Cite as

Preoperative visual evoked potential in the prediction of visual outcome after pituitary macroadenomas surgery

  • Mohammad Taghvaei
  • Seyed Mousa Sadrehosseini
  • Nima Ostadrahimi
  • Payam Sarraf
  • Mehdi ZeinalizadehEmail author



The purpose of the present study is to investigate longitudinal changes in Visual evoked potential (VEP) parameters as an objective test after transsphenoidal surgery, its correlation with subjective tests and clinical value of VEP in the prediction of visual outcome.


Fifty patients with pituitary macroadenoma who underwent surgical removal of the tumor recruited in this study. All the patients underwent ophthalmic examination, static automated perimetry (SAP), VEP and magnetic resonance imaging (MRI) preoperatively and 3 months after surgery.


Fifty patients with pituitary macroadenoma (size: 25.1 ± 9.9 mm) were recruited in the study. Before surgery, the pattern of VEP showed a prolonged latency with reduced amplitude in eyes with abnormal visual acuity or abnormal visual field. The P100 wave latencies and amplitudes showed significant correlation with visual acuity and SAP scores. After surgery, visual acuity and visual field improvements were seen in 51% and 65.6% of eyes, respectively. Mean SAP and visual acuity scores increased significantly (p < 0.01), P100 wave latency declined and amplitude improved after surgery but not significantly. The mean age of patients, size of tumors and preoperative P100 wave latency were significantly lower in eyes with visual field and acuity improvement.


VEP is a helpful quantitative and objective complementary test to visual acuity and SAP exams for assessing pre-operative visual abnormalities and post-operative visual outcome in patients with pituitary macroadenoma.


Pituitary adenoma Standard automated perimetry Transsphenoidal surgery Visual acuity Visual evoked potential Visual field 



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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Mohammad Taghvaei
    • 1
  • Seyed Mousa Sadrehosseini
    • 2
  • Nima Ostadrahimi
    • 1
  • Payam Sarraf
    • 3
  • Mehdi Zeinalizadeh
    • 1
    • 4
    Email author
  1. 1.Department of Neurological Surgery, Imam Khomeini Hospital ComplexTehran University of Medical SciencesTehranIran
  2. 2.Department of Otolaryngology-Head and Neck Surgery, Imam Khomeini Hospital ComplexTehran University of Medical SciencesTehranIran
  3. 3.Department of Neurology, Iranian Centre of Neurological Research, Imam Khomeini HospitalTehran University of Medical SciencesTehranIran
  4. 4.Pituitary Clinic, Brain and Spinal Injury Research Center (BASIR), Imam Khomeini Hospital ComplexTehran University of Medical SciencesTehranIran

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