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Lang M, Silva D, Dai L, Kshettry VR, Woodard TD, Sindwani R, Recinos PF. Superiority of constructive interference in steady-state MRI sequencing over T1-weighted MRI sequencing for evaluating cavernous sinus invasion by pituitary macroadenomas. J Neurosurg 2018; 130:1-8. [PMID: 29570007 DOI: 10.3171/2017.9.jns171699] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2017] [Accepted: 09/11/2017] [Indexed: 11/06/2022]
Abstract
OBJECTIVEPreoperatively determining the extent of parasellar invasion of pituitary macroadenomas is useful for surgical planning and patient counseling. Here, the authors compared constructive interference in steady state (CISS), a T2-weighted gradient-echo MRI sequence, to volume-interpolated breath-hold examination (VIBE), a T1-weighted gradient-echo MRI sequence, for evaluation of cavernous sinus invasion (CSI) by pituitary macroadenomas.METHODSVIBE and CISS images of 98 patients with pituitary macroadenoma were retrospectively analyzed and graded using the modified Knosp classification. The Knosp grades were correlated to surgical findings of CSI, which were determined intraoperatively using 0° and 30° endoscopes. The predictive accuracies for CSI according to the Knosp grades derived from the CISS and VIBE images were compared using receiver operating characteristic (ROC) curves. Postoperative MRI was used to evaluate the gross-total resection (GTR) rates.RESULTSThe CSI rate by pituitary macroadenomas was 27.6% (27 of 98 cases). Of 196 assessments (left and right sides of 98 macroadenomas), 45 (23.0%) had different Knosp grades when scored using VIBE versus CISS images. For the VIBE images, 0% of Knosp grade 0, 4.5% of grade 1, 23.8% of grade 2, 42.1% of grade 3A, 100% of grade 3B, and 83.3% of grade 4 macroadenomas were found to have CSI intraoperatively. For the CISS images, 0% of Knosp grade 0, 2.1% of grade 1, 31.3% of grade 2, 56.3% of grade 3A, 100% of grade 3B, and 100% of grade 4 macroadenomas were found to have CSI intraoperatively. Two pituitary macroadenomas were classified as grade 4 on VIBE sequences but grades 3A and 2 on CISS sequences; CSI was not observed intraoperatively in both cases. The GTR rate was 64.3% and 60.0% for high-grade (3A, 3B, and 4) macroadenomas classified using VIBE and CISS sequences, respectively. The areas under the ROC curves were 0.94 and 0.97 for VIBE- and CISS-derived Knosp grades (p = 0.007), respectively.CONCLUSIONSKnosp grades determined using CISS sequence images are better correlated with intraoperative CSI than those determined using VIBE sequence images. CISS sequences may be valuable for the preoperative assessment of pituitary macroadenomas.
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Affiliation(s)
- Min Lang
- 1School of Medicine, Case Western Reserve University
- 3Department of Neurosurgery, Neurological Institute
| | - Danilo Silva
- 3Department of Neurosurgery, Neurological Institute
- 5Section of Rhinology, Sinus, and Skull Base Surgery, Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio
| | - Lu Dai
- 2Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland Clinic
| | - Varun R Kshettry
- 2Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland Clinic
- 5Section of Rhinology, Sinus, and Skull Base Surgery, Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio
| | - Troy D Woodard
- 3Department of Neurosurgery, Neurological Institute
- 5Section of Rhinology, Sinus, and Skull Base Surgery, Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio
| | - Raj Sindwani
- 3Department of Neurosurgery, Neurological Institute
- 5Section of Rhinology, Sinus, and Skull Base Surgery, Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio
| | - Pablo F Recinos
- 2Cleveland Clinic Lerner College of Medicine, Case Western Reserve University, Cleveland Clinic
- 5Section of Rhinology, Sinus, and Skull Base Surgery, Head and Neck Institute, Cleveland Clinic, Cleveland, Ohio
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