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Gandhi K, Patil ST, Kumar B, Patel M, Chawre P, Ahmad M, Pandita K, Parate SB. Morphometry and Intracranial Relations of the Sphenoid Sinus in Context to Endoscopic Transnasal Transsphenoidal Surgery. Cureus 2023; 15:e40187. [PMID: 37431332 PMCID: PMC10329853 DOI: 10.7759/cureus.40187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/09/2023] [Indexed: 07/12/2023] Open
Abstract
Introduction Due to the variable degree of pneumatization, the shape and size of the sphenoid sinus are irregular. An endoscopic intranasal transsphenoidal approach is made in sphenoid sinus pathologies, sphenoid sinusitis, and sellar and parasellar diseases. A diagnostic approach to the sphenoid sinus is also done to get a better MRI scan of the pituitary. The present study aims to describe the variant types of sphenoid sinus, morphometry, anatomy, and relations of sphenoid sinus, which will be helpful to surgeons during an endoscopic approach to the sphenoid sinus. Materials and methods We studied 76 cadaveric sphenoid sinuses that were exposed by taking a sagittal section of 38 formalin-fixed cadaveric heads. After examining the inter-sphenoidal septum, it was removed to observe the inside aspect of the sphenoid sinus. Different dimensions of the sinus were noted down. The bulges inside the sinus due to neurovascular structures in relation to the sinus were observed. Results The most prominent type found was the sellar in 68.4% of cases preceded by the postsellar in 23.7% of cases. Presellar type of pneumatization was seen only in 7.9% of cases and the conchal type was absent. Intersphenoid septum was seen in 92,1% of cases, out of which 11.4% of septums were deficient on the posterior aspect. An internal carotid artery bulge in the sphenoid sinus was seen in 46% of cases. In 27.6% and 19.7% of sphenoid sinuses, bulging of the optic and vidian nerves, respectively, were seen. Some of these structures were dehiscent in the sphenoid sinus. Conclusions To get more space in the sphenoid sinus, the septa in the sinus are removed by surgeons, which may damage the walls of the sphenoid sinus. Knowledge of the relations of neurovascular structures with the sphenoid sinus will be helpful to surgeons during the transsphenoidal endoscopic approach to avoid any injury to these structures.
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Affiliation(s)
- Kusum Gandhi
- Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Sumit T Patil
- Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Brijesh Kumar
- Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Manmohan Patel
- Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Prashant Chawre
- Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Mohtashim Ahmad
- Anatomy, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Kawal Pandita
- Hospital Administration, All India Institute of Medical Sciences, Bhopal, Bhopal, IND
| | - Swapna B Parate
- Anatomy, SMBT Institute of Medical Science & Research Center, Nashik, IND
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Castle-Kirszbaum M, Amukotuwa S, Fuller P, Goldschlager T, Gonzalvo A, Kam J, Kow CY, Shi MD, Stuckey S. MRI for Cushing Disease: A Systematic Review. AJNR Am J Neuroradiol 2023; 44:311-316. [PMID: 36759141 PMCID: PMC10187804 DOI: 10.3174/ajnr.a7789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Accepted: 10/11/2022] [Indexed: 02/11/2023]
Abstract
BACKGROUND MR imaging is key in the diagnostic work-up of Cushing disease. The sensitivity of MR imaging in Cushing disease is not known nor is the prognostic significance of "MR imaging-negative" disease. PURPOSE Our aim was to determine the overall sensitivity and prognostic significance of MR imaging localization of Cushing disease. DATA SOURCES We performed a systematic review of the MEDLINE and PubMed databases for cohort studies reporting the sensitivity of MR imaging for the detection of adenomas in Cushing disease. STUDY SELECTION This study included 57 studies, comprising 5651 patients. DATA ANALYSIS Risk of bias was assessed using the methodological index for non-randomized studies criteria. Meta-analysis of proportions and pooled subgroup analysis were performed. DATA SYNTHESIS Overall sensitivity was 73.4% (95% CI, 68.8%-77.7%), and the sensitivity for microadenomas was 70.6% (66.2%-74.6%). There was a trend toward greater sensitivity in more recent studies and with the use of higher-field-strength scanners. Thinner-section acquisitions and gadolinium-enhanced imaging, particularly dynamic sequences, also increased the sensitivity. The use of FLAIR and newer 3D spoiled gradient-echo and FSE sequences, such as spoiled gradient-echo sequences and sampling perfection with application-optimized contrasts by using different flip angle evolutions, may further increase the sensitivity but appear complementary to standard 2D spin-echo sequences. MR imaging detection conferred a 2.63-fold (95% CI, 2.06-3.35-fold) increase in remission for microadenomas compared with MR imaging-negative Cushing disease. LIMITATIONS Pooled analysis is limited by heterogeneity among studies. We could not account for variation in image interpretation and tumor characteristics. CONCLUSIONS Detection on MR imaging improves the chances of curative resection of adenomas in Cushing disease. The evolution of MR imaging technology has improved the sensitivity for adenoma detection. Given the prognostic importance of MR imaging localization, further effort should be made to improve MR imaging protocols for Cushing disease.
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Affiliation(s)
- M Castle-Kirszbaum
- From the Departments of Neurosurgery (M.C.-K., T.G., J.K., C.Y.K.)
- Surgery (M.C.-K., T.G.), Monash Health, Melbourne, Australia
| | | | - P Fuller
- Endocrinology (P.F.)
- Hudson Institute (P.F.), Melbourne, Australia
| | - T Goldschlager
- From the Departments of Neurosurgery (M.C.-K., T.G., J.K., C.Y.K.)
- Surgery (M.C.-K., T.G.), Monash Health, Melbourne, Australia
| | - A Gonzalvo
- Department of Neurosurgery (A.G., J.K.), Austin Hospital, Melbourne, Australia
| | - J Kam
- From the Departments of Neurosurgery (M.C.-K., T.G., J.K., C.Y.K.)
- Department of Neurosurgery (A.G., J.K.), Austin Hospital, Melbourne, Australia
| | - C Y Kow
- From the Departments of Neurosurgery (M.C.-K., T.G., J.K., C.Y.K.)
| | - M D Shi
- Barwon Health (M.D.S.), Geelong, Australia
| | - S Stuckey
- Department of Radiology (S.S.), Peter MacCallum Cancer Centre, Melbourne, Australia
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Andereggen L, Mariani L, Beck J, Andres RH, Gralla J, Luedi MM, Weis J, Christ E. Lateral one-third gland resection in Cushing patients with failed adenoma identification leads to low remission rates: long-term observations from a small, single-center cohort. Acta Neurochir (Wien) 2021; 163:3161-3169. [PMID: 33811521 PMCID: PMC8520517 DOI: 10.1007/s00701-021-04830-2] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 03/23/2021] [Indexed: 12/17/2022]
Abstract
BACKGROUND Currently, there are no guidelines for neurosurgeons treating patients with Cushing's disease (CD) when intraoperative adenoma identification is negative. Under these circumstances, a total hypophysectomy or hemi-hypophysectomy on the side indicated by inferior petrosal sinus sampling (IPSS) is the approach being used, although there is a subsequent risk of hypopituitarism. Data on whether one-third lateral pituitary gland resection results in cure of hypercortisolism and low rates of hypopituitarism remain inconclusive. METHODS Retrospective single-center study of CD patients with failed intraoperative adenoma identification and subsequent resection of the lateral one-third of the pituitary gland as predicted by IPSS. We assessed (i) histopathological findings, (ii) early and long-term remission rates, and (iii) rates of additional pituitary hormone insufficiency. RESULTS Ten women and three men met the inclusion criteria. At 3 months, remission was noted in six (46%) patients: three (23%) had histologically confirmed adenomas, two (15%) had ACTH hyperplasia, and one patient (8%) was positive for Crooke's hyaline degeneration. New pituitary hormone deficits were noted in two patients (15%). After a median (±SD) follow-up of 14±4 years, recurrence was noted in two (15%) patients. Long-term control of hypercortisolism was attained by 10 patients (77%), with additional therapies required in nine (69%) of them. CONCLUSIONS In CD patients with failed intraoperative adenoma visualization, lateral one-third gland resection resulted in low morbidity and long-term remission in 31% of patients without the need for additional therapies. Bearing in mind the sample size of this audit, the indication for lateral one-third-gland resection has to be critically appraised and discussed with the patients before surgery.
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Affiliation(s)
- Lukas Andereggen
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland.
- Department of Neurosurgery, Kantonsspital Aarau, Aarau, Switzerland.
| | - Luigi Mariani
- Department of Neurosurgery, University Hospital of Basel, Basel, Switzerland
| | - Jürgen Beck
- Department of Neurosurgery, Medical Center, University of Freiburg, Freiburg, Germany
| | - Robert H Andres
- Department of Neurosurgery, Neurocenter and Regenerative Neuroscience Cluster, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Jan Gralla
- Department of Neuroradiology, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Markus M Luedi
- Department of Anaesthesiology and Pain Medicine, Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Joachim Weis
- Institute of Neuropathology, RWTH Aachen University Hospital, Aachen, Germany
| | - Emanuel Christ
- Department of Endocrinology, Diabetology and Metabolism, University Hospital of Basel, Basel, Switzerland
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Andereggen L, Gralla J, Schroth G, Mordasini P, Andres RH, Widmer HR, Luedi MM, Kellner F, Beck J, Mariani L, Ozdoba C, Christ E. Influence of inferior petrosal sinus drainage symmetry on detection of adenomas in Cushing's syndrome. J Neuroradiol 2019; 48:10-15. [PMID: 31228539 DOI: 10.1016/j.neurad.2019.05.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 05/29/2019] [Accepted: 05/31/2019] [Indexed: 12/26/2022]
Abstract
BACKGROUND Asymmetric inferior petrosal sinuses (IPS) are not infrequently encountered during bilateral IPS sampling. There is little data on whether IPS symmetry influences success in predicting the adenoma side in patients with ACTH-dependent Cushing's syndrome (CS). OBJECTIVE To assess the influence of IPS drainage patterns on detection of an adenoma in CS. METHODS Retrospective single-center cohort analysis reviewing records of patients with CS and negative MRI findings who subsequently underwent BIPSS. RESULTS BIPSS was performed in 38 patients with a mean age of 45±15 years. The overall technical success rate was 97% for bilateral cannulation. Asymmetric IPS were observed in 11 (39%) patients with Cushing's disease (CD). A side-to-side ACTH ratio was not significantly different between patients with symmetric outflow and those with asymmetric outflow at baseline (8.6±2.7 versus 16.4±6.0; P=0.45), but ratios were significantly different after ovine corticotropin-releasing hormone (oCRH) stimulation (6.0±2.5 versus 35.7±22.5; P=0.03). BIPSS correctly predicted the side of the adenoma in 25 (96%) patients with CD. Prediction was better when the venous outflow was symmetric (100%) rather than asymmetric (93%), although the difference was not significant (P=0.42). Remission from CS was achieved in 32 patients (87%), independent of the symmetry of IPS. CONCLUSIONS Bearing in mind the sample size of this audit, asymmetric IPS at least do not seem to diminish the accuracy of diagnosis of ACTH-dependent CS, nor do they influence the clinical outcome.
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Affiliation(s)
- Lukas Andereggen
- Department of neurosurgery, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Jan Gralla
- Department of neuroradiology, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Gerhard Schroth
- Department of neuroradiology, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Pasquale Mordasini
- Department of neuroradiology, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Robert H Andres
- Department of neurosurgery, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Hans Rudolf Widmer
- Department of neurosurgery, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Markus M Luedi
- Department of anaesthesiology and pain medicine, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Frauke Kellner
- Department of neuroradiology, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Jürgen Beck
- Department of neurosurgery, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Luigi Mariani
- Department of neurosurgery, university hospital of Basel, Basel, Switzerland
| | - Christoph Ozdoba
- Department of neuroradiology, Inselspital, Bern university hospital, university of Bern, Bern, Switzerland
| | - Emanuel Christ
- Department of endocrinology, diabetology and metabolism, university hospital of Basel, Basel, Switzerland.
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Wang Z, Xing B. Letter to the Editor. Detection of MRI-negative Cushing’s disease by FLAIR imaging: is it reliable? J Neurosurg 2018; 129:839-841. [DOI: 10.3171/2017.12.jns173041] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Abstract
A variety of intraoperative MRI (iMRI) systems are in use during transsphenoidal surgery (TSS). The variations in iMRI systems include field strengths, magnet configurations, and room configurations. Most studies report that the primary utility of iMRI during TSS lies in detecting resectable tumor residuals following maximal resection with conventional technique. Stereotaxis, neuronavigation, and complication avoidance/detection are enhanced by iMRI use during TSS. The use of iMRI during TSS can lead to increased extent of resection for large tumors. Improved remission rates from hormone-secreting tumors have also been reported with iMRI use. This article discusses the history, indications, and future directions for iMRI during TSS.
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Affiliation(s)
- Prashant Chittiboina
- Neurosurgery Unit for Pituitary and Inheritable Diseases, National Institute of Neurological Diseases and Stroke, National Institutes of Health, 10 Center Drive, Room 3D20, Bethesda, MD 20892-1414, USA.
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