Journal of Korean Neurosurgical Society

The Korean Neurosurgical Society (대한신경외과학회)
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Correlation between the Position of the Pituitary Stalk as Determined by Diffusion Tensor Imaging and Its Location as Determined at the Time of Surgical Resection of Pituitary Adenomas

  • Wang, Fu-yu (Department of Neurosurgery, The First Medical Center, PLA General Hospital) ;
  • Wang, Peng (Department of Neurosurgery, The First Medical Center, PLA General Hospital) ;
  • Yang, Chen-xuan (Department of Neurosurgery, The First Medical Center, PLA General Hospital) ;
  • Zhou, Tao (Department of Neurosurgery, The First Medical Center, PLA General Hospital) ;
  • Jiang, Jin-li (Department of Neurosurgery, The First Medical Center, PLA General Hospital) ;
  • Meng, Xiang-hui (Department of Neurosurgery, The First Medical Center, PLA General Hospital)
  • Received : 2019.10.16
  • Accepted : 2019.12.18
  • Published : 2020.07.01
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Abstract

Objective : An important factor during pituitary adenoma surgery is to preserve pituitary stalk (PS) as this plays a role in reduction of the risk of postoperative diabetes insipidus. The hypothalamic-hypophyseal tract (HHT) projects through the PS to the posterior pituitary gland. To reconstruct white matter fiber pathways, methods like diffusion tensor imaging (DTI) tractography have been widely used. In this report we attempted to predict the position of PS using DTI tractography and to assess its intraoperative correlation during surgery of pituitary adenomas. Methods : DTI tractography was used to tract the HHT in nine patients before craniotomy for pituitary adenomas. The DTI location of the HHT was compared with the PS position identified at the time of surgery. DTI fiber tracking was carried out in nine patients prior to the planned craniotomy for pituitary adenomas. In one patient, the PS could not be identified during the surgery. In the other eight patients, a comparison was made between the location of the HHT identified by DTI and the position of the PS visualized at the time of surgery. Results : The position of the HHT identified by DTI showed consistency with the intraoperative position of the PS in seven patients (88.9% concordance). Conclusion : This study shows that DTI can identify the position of the HHT and thus the position of the PS with a high degree of reliability.

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References

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