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Zipfel J, Kerscher SR, Dhillon K, Ferraris KP, Singhal A. Optic nerve sheath diameter correlates with both success and failure of hydrocephalus treatment in pediatric patients with pineal region lesions. Acta Neurochir (Wien) 2024; 166:236. [PMID: 38805061 DOI: 10.1007/s00701-024-06122-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Accepted: 05/08/2024] [Indexed: 05/29/2024]
Abstract
BACKGROUND Pineal region lesions in children are heterogenous pathologies often symptomatic due to occlusive hydrocephalus and thus elevated intracranial pressure (ICP). MRI-derived parameters to assess hydrocephalus are the optic nerve sheath diameter (ONSD) as a surrogate for ICP and the frontal occipital horn ratio (FOHR), representing ventricle volume. As elevated ICP may not always be associated with clinical signs, the adjunct of ONSD could help decision making in patients undergoing treatment. The goal of this study is to assess the available magnetic resonance imaging (MRI) of patients with pineal region lesions undergoing surgical treatment with respect to pre- and postoperative ONSD and FOHR as an indicator for hydrocephalus. METHODS Retrospective data analysis was performed in all patients operated for pineal region lesions at a tertiary care center between 2010 and 2023. Only patients with pre- and postoperative MRI were selected for inclusion. Clinical data and ONSD at multiple time points, as well as FOHR were analyzed. Imaging parameter changes were correlated with clinical signs of hydrocephalus before and after surgical treatment. RESULTS Thirty-three patients with forty operative cases met the inclusion criteria. Age at diagnosis was 10.9 ± 4.6 years (1-17 years). Hydrocephalus was seen in 80% of operative cases preoperatively (n = 32/40). Presence of hydrocephalus was associated with significantly elevated preoperative ONSD (p = 0.006). There was a significant decrease in ONSD immediately (p < 0.001) and at 3 months (p < 0.001) postoperatively. FOHR showed a slightly less pronounced decrease (immediately p = 0.006, 3 months p = 0.003). In patients without hydrocephalus, no significant changes in ONSD were observed (p = 0.369). In 6/6 patients with clinical hydrocephalus treatment failure, ONSD increased, but in 3/6 ONSD was the only discernible MRI change with unchanged FOHR. CONCLUSIONS ONSD measurements may have utility in evaluating intracranial hypertension due to hydrocephalus in patients with pineal region tumors. ONSD changes appear to have value in assessing hydrocephalus treatment failure.
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Affiliation(s)
- Julian Zipfel
- Division of Pediatric Neurosurgery, B.C. Children's Hospital, Vancouver, BC, Canada.
- Section of Pediatric Neurosurgery, Department of Neurosurgery, University Hospital Tuebingen, Hoppe-Seyler-Str. 3, 72076, Tübingen, Germany.
| | - Susanne R Kerscher
- Department of Diagnostic and Interventional Radiology, University Hospital Ulm, Ulm, Germany
| | - Karan Dhillon
- Division of Pediatric Neurosurgery, B.C. Children's Hospital, Vancouver, BC, Canada
| | - Kevin Paul Ferraris
- Division of Pediatric Neurosurgery, B.C. Children's Hospital, Vancouver, BC, Canada
| | - Ash Singhal
- Division of Pediatric Neurosurgery, B.C. Children's Hospital, Vancouver, BC, Canada
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Macher S, Marik W, Krajnc N, Mitsch C, Michl M, Mueller N, Novak K, Zaic S, Woeber C, Pemp B, Bsteh G. The additive value of complementing diagnostic idiopathic intracranial hypertension criteria by MRI - an external validation study. J Headache Pain 2024; 25:70. [PMID: 38711044 DOI: 10.1186/s10194-024-01781-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Accepted: 04/28/2024] [Indexed: 05/08/2024] Open
Abstract
BACKGROUND Recently, diagnostic criteria including a standardized MRI criterion were presented to identify patients suffering from idiopathic intracranial hypertension (IIH) proposing that IIH might be defined by two out of three objective findings (papilledema, ≥ 25 cm cerebrospinal fluid opening pressure (CSF-OP) and ≥ 3/4 neuroimaging signs). METHODS To provide independent external validation, we retrospectively applied the proposed diagnostic criteria to our cohort of patients with clinical suspicion of IIH from the Vienna IIH database. Neuroimaging was reevaluated for IIH signs according to standardized definitions by a blinded expert neuroradiologist. We determined isolated diagnostic accuracy of the neuroimaging criterion (≥ 3/4 signs) as well as overall accuracy of the new proposed criteria. RESULTS We included patients with IIH (n = 102) and patients without IIH (no-IIH, n = 23). Baseline characteristics were balanced between IIH and no-IIH groups, but papilledema and CSF-OP were significantly higher in IIH. For the presence of ≥ 3/4 MRI signs, sensitivity was 39.2% and specificity was 91.3% with positive predictive value (PPV) of 95.2% and negative predictive value (NPV) 25.3%. Reclassifying our cohort according to the 2/3 IIH definition correctly identified 100% of patients without IIH, with definite IIH and suggested to have IIH without papilledema by Friedman criteria, respectively. CONCLUSION The standardized neuroimaging criteria are easily applicable in clinical routine and provide moderate sensitivity and excellent specificity to identify patients with IIH. Defining IIH by 2/3 criteria significantly simplifies diagnosis without compromising accuracy.
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Affiliation(s)
- Stefan Macher
- Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria
| | - Wolfgang Marik
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria
- Department of Neuroradiology, Medical University of Vienna, Vienna, Austria
| | - Nik Krajnc
- Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria
| | - Christoph Mitsch
- Department of Ophthalmology, Medical University of Vienna, Vienna, Austria
| | - Martin Michl
- Department of Ophthalmology, Medical University of Vienna, Vienna, Austria
| | - Nina Mueller
- Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria
| | - Klaus Novak
- Department of Neurosurgery, Medical University of Vienna, Vienna, Austria
| | - Sina Zaic
- Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria
| | - Christian Woeber
- Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria
| | - Berthold Pemp
- Department of Ophthalmology, Medical University of Vienna, Vienna, Austria
| | - Gabriel Bsteh
- Department of Neurology, Medical University of Vienna, Währinger Gürtel 18-20, Vienna, 1090, Austria.
- Comprehensive Center for Clinical Neurosciences and Mental Health, Medical University of Vienna, Vienna, Austria.
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Friedman DI. The Pseudotumor Cerebri Syndrome. Neurol Clin 2024; 42:433-471. [PMID: 38575259 DOI: 10.1016/j.ncl.2024.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/06/2024]
Abstract
Pseudotumor cerebri syndrome is a syndrome of increased cerebrospinal fluid pressure without ventriculomegaly, mass lesion, or meningeal abnormality. It is either primary (idiopathic intracranial hypertension, IIH) or secondary. A secondary cause is unlikely when adhering to the diagnostic criteria. Permanent visual loss occurs if undetected or untreated, and the associated headaches may be debilitating. Fulminant disease may result in blindness despite aggressive treatment. This study addresses the diagnosis and management of IIH including new insights into the pathobiology of IIH, updates in therapeutics and causes of overdiagnosis.
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Schuchardt FF, Lützen N, Küchlin S, Reich M, Lagrèze WA, Mast H, Weigel M, Meckel S, Urbach H, Weiller C, Harloff A, Demerath T. Clinical value of neuroimaging indicators of intracranial hypertension in patients with cerebral venous thrombosis. Neuroradiology 2024:10.1007/s00234-024-03363-6. [PMID: 38676750 DOI: 10.1007/s00234-024-03363-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Accepted: 04/19/2024] [Indexed: 04/29/2024]
Abstract
PURPOSE Intracranial hypertension (IH) frequently complicates cerebral venous thrombosis (CVT). Distinct neuroimaging findings are associated with IH, yet their discriminative power, reversibility and factors favoring normalization in prospective CVT patients are unknown. We determined test performance measures of neuroimaging signs in acute CVT patients, their longitudinal change under anticoagulation, association with IH at baseline and with recanalization at follow-up. METHODS We included 26 consecutive acute CVT patients and 26 healthy controls. Patients were classified as having IH based on CSF pressure > 25 cmH2O and/or papilledema on ophthalmological examination or ocular MRI. We assessed optic nerve sheath diameter (ONSD), optic nerve tortuousity, bulbar flattening, lateral and IVth ventricle size, pituitary configuration at baseline and follow-up, and their association with IH and venous recanalization. RESULTS 46% of CVT patients had IH. ONSD enlargement > 5.8 mm, optic nerve tortuousity and pituitary grade ≥ III had highest sensitivity, ocular bulb flattening and pituitary grade ≥ III highest specificity for IH. Only ONSD reliably discriminated IH at baseline. Recanalization was significantly associated with regressive ONSD and pituitary grade. Other neuroimaging signs tended to regress with recanalization. After treatment, 184.9 ± 44.7 days after diagnosis, bulbar flattening resolved, whereas compared with controls ONSD enlargement (p < 0.001) and partially empty sella (p = 0.017), among other indicators, persisted. CONCLUSION ONSD and pituitary grading have a high diagnostic value in diagnosing and monitoring CVT-associated IH. Given their limited sensitivity during early CVT and potentially persistent alterations following IH, neuroimaging indicators can neither replace CSF pressure measurement in diagnosing IH, nor determine the duration of anticoagulation.
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Affiliation(s)
- Florian F Schuchardt
- Department of Neurology and Neurophysiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
| | - Niklas Lützen
- Department of Neuroradiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sebastian Küchlin
- Eye Center, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Michael Reich
- Eye Center, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Wolf A Lagrèze
- Eye Center, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Hansjörg Mast
- Department of Neuroradiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Matthias Weigel
- Translational Imaging in Neurology (ThINk) Basel, Department of Biomedical Engineering, Faculty of Medicine, University Hospital Basel and University of Basel, Allschwil, Switzerland
- Department of Neurology, University Hospital Basel, Basel, Switzerland
- Research Center for Clinical Neuroimmunology and Neuroscience Basel (RC2NB), University Hospital Basel and University of Basel, Basel, Switzerland
- Division of Radiological Physics, Department of Radiology, University Hospital Basel, Basel, Switzerland
| | - Stephan Meckel
- Department of Neuroradiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Institute of Diagnostic and Interventional Neuroradiology, RKH Kliniken Ludwigsburg, Ludwigsburg, Germany
| | - Horst Urbach
- Department of Neuroradiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Cornelius Weiller
- Department of Neurology and Neurophysiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Andreas Harloff
- Department of Neurology and Neurophysiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Theo Demerath
- Department of Neuroradiology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
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Costello F, Hamann S. Advantages and Pitfalls of the Use of Optical Coherence Tomography for Papilledema. Curr Neurol Neurosci Rep 2024; 24:55-64. [PMID: 38261144 DOI: 10.1007/s11910-023-01327-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2023] [Indexed: 01/24/2024]
Abstract
PURPOSE OF REVIEW Papilledema refers to optic disc swelling caused by raised intracranial pressure. This syndrome arises from numerous potential causes, which may pose varying degrees of threat to patients. Manifestations of papilledema range from mild to severe, and early diagnosis is important to prevent vision loss and other deleterious outcomes. The purpose of this review is to highlight the role of optical coherence tomography (OCT) in the diagnosis and management of syndromes of raised intracranial pressure associated with papilledema. RECENT FINDINGS Ophthalmoscopy is an unreliable skill for many clinicians. Optical coherence tomography is a non-invasive ocular imaging technique which may fill a current care gap, by facilitating detection of papilledema for those who cannot perform a detailed fundus examination. Optical coherence tomography may help confirm the presence of papilledema, by detecting subclinical peripapillary retinal nerve fiber layer (pRNFL) thickening that might otherwise be missed with ophthalmoscopy. Enhanced depth imaging (EDI) and swept source OCT techniques may identify optic disc drusen as cause of pseudo-papilledema. Macular ganglion cell inner plexiform layer (mGCIPL) values may provide early signs of neuroaxonal injury in patients with papilledema and inform management for patients with syndromes of raised intracranial pressure. There are well-established advantages and disadvantages of OCT that need to be fully understood to best utilize this method for the detection of papilledema. Overall, OCT may complement other existing tools by facilitating detection of papilledema and tracking response to therapies. Moving forward, OCT findings may be included in deep learning models to diagnose papilledema.
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Affiliation(s)
- Fiona Costello
- Department of Clinical Neurosciences, Cumming School of Medicine, University of Calgary, Alberta, Canada.
- Department of Surgery, Cumming School of Medicine, University of Calgary, Alberta, Canada.
| | - Steffen Hamann
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Glostrup, Denmark
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Sayal AP, Jhaveri A, Diouf AA, Lam CTY, Suthiphosuwan S, Micieli JA. Empty Sella in Neuro-Ophthalmology Patients Without Raised Intracranial Pressure. J Neuroophthalmol 2024; 44:61-65. [PMID: 36730894 DOI: 10.1097/wno.0000000000001741] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Empty sella often supports a diagnosis of raised intracranial pressure (ICP) but is also seen in normal individuals. This study's objective was to determine the prevalence of empty and partially empty sella in neuro-ophthalmology patients undergoing MRI for indications other than papilledema or raised ICP. METHODS Consecutive patients without papilledema or suspected raised ICP who underwent brain MRI between August 2017 and May 2021 were included in this study. Sagittal T1 images were evaluated by 2 independent, blinded neuroradiologists who graded the sella using the published criteria (Categories 1-5, with 1 being normal and 5 showing no visible pituitary tissue). Clinical parameters were also collected. RESULTS A total of 613 patients (309 men; average age 56.69 ± 18.06 years) were included in this study with optic neuropathy as the most common MRI indication. A total of 176 patients had moderate concavity of the pituitary gland (Category 3), 81 had severe concavity (Category 4), and 26 had no visible pituitary tissue (Category 5). Sella appearance was mentioned in 92 patients' radiology reports (15%). There was a statistically significant difference in age between composite Categories 1 and 2 (mean 52.89 ± 18.91; P < 0.001) and composite Categories 4 and 5 (mean 63.41 ± 15.44), but not the other clinical parameters. CONCLUSION Empty sella is common in neuro-ophthalmology patients without raised ICP; 17.4% of patients have severe concavity or no pituitary tissue visible. An isolated finding of empty or partially empty sella on imaging is therefore of questionable clinical value in this patient population.
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Affiliation(s)
- Aman P Sayal
- Faculty of Medicine (APS, AJ), Departments of Medical Imaging (AD, SS), and Ophthalmology and Vision Sciences (CTYL, JAM), University of Toronto, Toronto, Canada
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Kaya Tutar N, Kale N. The Relationship between Lumbar Puncture Opening Pressure and Retinal Nerve Fiber Layer Thickness in the Diagnosis of Idiopathic Intracranial Hypertension: Is a Lumbar Puncture Always Necessary? Neurologist 2024; 29:91-95. [PMID: 37839079 DOI: 10.1097/nrl.0000000000000528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
OBJECTIVES Idiopathic intracranial hypertension (IIH), is characterized by elevated intracranial pressure (ICP) without an identified cause. Today, lumbar puncture (LP) is the most common method used for diagnosis by measuring cerebrospinal fluid (CSF) pressure to reflect intracranial pressure. This invasive examination has significant disadvantages, such as complications and negative experiences for patients. Therefore, noninvasive methods for ICP measurement are desired. Optical coherence tomography (OCT) is widely used for the diagnosis and follow-up of IIH patients as it reflects papilledema. The aim of this study is to investigate the relationship between CSF pressure and OCT parameters and the ability of OCT in the diagnostic approach. METHODS In our study, patients who were followed up with a diagnosis of IIH with complete neuro-ophthalmological examinations, including visual acuity (VA), visual field, and OCT imaging within 24 hours before lumbar puncture, were retrospectively evaluated. CSF pressure, visual acuity LogMAR, mean deviation of visual fields, retinal nerve fiber layer (RNFL) thickness measured by OCT, and treatment protocols were obtained from our hospital data system. RESULTS A total of 42 eyes of 21 patients were enrolled in the study. A statistically significant positive and moderate correlation was found between CSF pressure values and average RNFL thickness ( r =0.507; P =0.001). The same relationship was demonstrated in all 4 quadrants: inferior, superior, nasal, and temporal. CONCLUSIONS Increased peripapillary RNFL thickness in optic nerve head OCT may be correlated with increased ICP in IIH patients. A larger number of patients are needed to better understand the correlation between OCT parameters and CSF pressure in patients with IIH.
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Affiliation(s)
- Nurhan Kaya Tutar
- Department of Neurology, Bagcilar Training and Research Hospital, Istanbul, Turkey
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Handzic A, Tao BK, O'Cearbhaill RM, Nicholson PJ, Margolin EA, Micieli JA. Assessment of Reversibility of Transverse Venous Sinus Stenosis in Patients With Papilledema. J Neuroophthalmol 2024:00041327-990000000-00577. [PMID: 38373047 DOI: 10.1097/wno.0000000000002090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/20/2024]
Abstract
BACKGROUND Bilateral transverse venous sinus stenosis (TVSS) or stenosis of a dominant venous sinus has been found to be very sensitive radiological findings in patients with intracranial hypertension (IH), yet there is still an ongoing debate whether they constitute reversible or permanent phenomena. Thus, the purpose of this study was to investigate the reversibility of TVSS in patients with IH, including conservatively treated patients with signs of IH as defined by the presence of papilledema. METHODS This was a retrospective chart review of all patients diagnosed with IH between 2016 and 2022, assessed from 2 tertiary university-affiliated neuro-ophthalmology practices. Inclusion criteria were the presence of papilledema, as quantified by optical coherence tomography, and bilateral TVSS, which is considered typical of IH on neuroimaging. During follow-up, included patients must have had confirmation of papilledema resolution as well as subsequent neuroimaging after conservative treatment or cerebrospinal fluid flow diversion. Patients with dural sinus vein thrombosis or intrinsic stenosis from sinus trabeculations or significant arachnoid granulations were excluded from the study. Either CT venography or MRI/MR venography was reviewed by a fellowship-trained neuroradiologist, and the degree of stenosis was scored through the combined conduit score (CCS), as described by Farb et al. The primary outcome was to assess TVSS changes after resolution or improvement of papilledema. RESULTS From 435 patients, we identified a subset of 10 who satisfied all inclusion criteria. Our cohort comprised entirely women with a median age of 29.5 years and a median BMI of 32.5 kg/m2. Treatment consisted of acetazolamide in 7 patients, of which 1 had additional topiramate and 2 underwent cerebrospinal fluid flow diversion. Furthermore, 6 patients demonstrated significant weight loss during follow-up. For the primary outcome, 5 of 10 patients exhibited no appreciable TVSS change, and 5 patients demonstrated significant improvement in TVSS, of which 4 received conservative treatment only. Papilledema resolution or improvement was statistically significantly associated with increasing average CCS, TVSS diameter, and grade. CONCLUSIONS We were able to demonstrate that TVSS can be both irreversible and reversible in patients with resolved papilledema. The finding of TVSS reversibility from conservative treatment alone is novel and has important implications to optimize patient care. Future studies should work to identify factors associated with irreversible TVSS for subsequent targeted intervention and prevention.
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Affiliation(s)
- Armin Handzic
- Department of Ophthalmology and Vision Sciences (AH, EAM, JAM), Faculty of Medicine, University of Toronto, Toronto, Canada; Faculty of Medicine (BKT), University of British Columbia, Vancouver, Canada; Division of Neuroradiology (RMOC, PJN), Department of Radiology, Faculty of Medicine, University of Toronto, Toronto, Canada; Division of Neurology (EAM, JAM), Department of Medicine, Faculty of Medicine, University of Toronto, Toronto, Canada; and Kensington Vision and Research Center (JAM), Toronto, Canada
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Sarkar S, Corrales CE, Laws ER, Smith TR. Intrasellar Arachnoid Diverticulae as a Risk Factor for Intraoperative Cerebrospinal Fluid Leakage in Patients Undergoing Endoscopic Transsphenoidal Surgery. Oper Neurosurg (Hagerstown) 2024:01787389-990000000-01057. [PMID: 38329346 DOI: 10.1227/ons.0000000000001079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 12/19/2023] [Indexed: 02/09/2024] Open
Abstract
BACKGROUND AND OBJECTIVES Intrasellar arachnoid diverticulae can often be identified on preoperative imaging in patients undergoing endoscopic transsphenoidal surgery. The objective of this study was to characterize arachnoid diverticulae both qualitatively and quantitatively in a large institutional cohort of patients with pituitary tumors and to evaluate its association with intraoperative cerebrospinal fluid (CSF) leak. METHODS Preoperative imaging studies of 530 patients who underwent primary endoscopic transsphenoidal resection of pituitary tumors were examined both quantitatively and qualitatively for the presence of an intrasellar arachnoid diverticulum. A matched cohort analysis was performed to compare patients with a "significant" (>50% sellar depth) diverticulum with those with nonsignificant/no diverticulum. Morphologically, diverticulae were separately classified as Type 1 (ventral CSF cleft with no tumor/gland tissue between sellar face and infundibulum) or Type 2 (central CSF cleft with tumor/gland tissue between sellar face and infundibulum). RESULTS Arachnoid diverticulae were noted in 40.2% of cases, and diverticulum depth was linearly correlated with tumor size and body mass index. A significant diverticulum was identified in 66 cases (12.5%) and was significantly associated with the functional tumor subtype (P = .005) and intraoperative CSF leak (P < .001). Type 1 clefts were associated with nonfunctional pathology (P = .034) and the presence of suprasellar extension (P = .035) and tended to be deeper than Type 2 clefts (P < .001), with a higher incidence of intraoperative CSF leak (P = .093). On logistic regression analysis, only the presence of a significant diverticulum was independently associated with intraoperative CSF leak (odds ratio 4.545; 95% CI 2.418-8.544; P < .001). CONCLUSION The presence of an intrasellar arachnoid diverticulum should alert the surgeon to an elevated risk of intraoperative CSF leak during transsphenoidal surgery for pituitary tumors. A relatively limited surgical exposure tailored to the craniocaudal extent of the sellar pathology should be considered in these patients.
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Affiliation(s)
- Sauradeep Sarkar
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Computatonal Neuroscience Outcomes Center, Harvard Medical School, Boston, Massachusetts, USA
| | - C Eduardo Corrales
- Department of Otolaryngology, Head and Neck Surgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Edward R Laws
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Timothy R Smith
- Department of Neurosurgery, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Computatonal Neuroscience Outcomes Center, Harvard Medical School, Boston, Massachusetts, USA
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10
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Berman G, Mollan SP. The Pressure of Headache at the United Kingdom CSF Disorders Day 2023. Neuroophthalmology 2024; 48:204-209. [PMID: 38756340 PMCID: PMC11095568 DOI: 10.1080/01658107.2023.2290539] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2023] [Accepted: 11/18/2023] [Indexed: 05/18/2024] Open
Abstract
Headache in intracranial disorders drives significant disability in our patients. Management principles for secondary headaches require a multidisciplinary approach with expertise from the neurological, neuro-ophthalmological, neuroradiological, and neurosurgical specialities. The Pressure of Headache was the theme of the annual United Kingdom CSF Disorders Day and saw speakers and panellists from Australia, Europe, and the United States. Among the topics presented were the newest concepts underpinning idiopathic intracranial hypertension management and spontaneous intracranial hypotension. Advances in our knowledge of cerebrospinal fluid secretion and the visual snow syndrome debate were particular highlights. This review provides a summary of the research on headache disorders that overlap the neuro-ophthalmological axis of care for patients.
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Affiliation(s)
- Gabriele Berman
- Birmingham Neuro-Ophthalmology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Susan P. Mollan
- Birmingham Neuro-Ophthalmology, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
- Translational Brain Science, Institute of Metabolism and Systems Research, College of Medical and Dental Sciences, University of Birmingham, Birmingham, UK
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Yousef YA, Sid Ahmed IM, Kanj Ahmad D, Mohammad M, Makahleh H, AlJabari R, Alkhatib F, Toro MD, Rejdak R, Mehyar M, Alnawaiseh I. Optic Disc Swelling in Cancer Patients: Etiology and Implications. J Clin Med 2023; 12:7140. [PMID: 38002752 PMCID: PMC10672066 DOI: 10.3390/jcm12227140] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2023] [Revised: 10/05/2023] [Accepted: 10/10/2023] [Indexed: 11/26/2023] Open
Abstract
PURPOSE To analyze the etiology and implications of optic disc swelling in cancer patients treated at a specialized tertiary cancer center in Jordan. METHODS This was a retrospective study of all cancer patients who had optic disc swelling between January 2019 and December 2020 at King Hussein Cancer Center (KHCC). Patients' data included age, sex, laterality, visual acuity, and the underlying cause and management for the optic disc swelling. RESULTS Optic disc swelling was present in 58 cancer patients (96 eyes), with 38 (65%) having bilateral involvement. Among these, 33 (57%) were female, and 43 (74%) were ≤40 years old. At diagnosis, 58 (63%) eyes had a best-corrected visual acuity (BCVA) better than 0.5, improving to 73 (76%) eyes at the last follow-up. High intracranial pressure (ICP) was the most common primary cause (30 patients/52%), followed by tumor infiltration of the optic nerve (10 patients/17%), optic nerve compression (7 patients/12%), and optic nerve inflammation (5 patients/9%). Four patients had pseudopapilledema. Among the 30 patients with high ICP, CNS tumors were predominant (21 patients/70%), with only 3 having idiopathic intracranial hypertension. Medications, including ATRA (All-Trans Retinoic Acid) and systemic steroids, contributed to increased ICP in six patients (20%). BCVA was less than 0.5 in all eyes (100%) affected by tumor infiltration, optic nerve inflammation, and ischemic optic neuropathy, while only eight eyes (14%) with optic disc swelling due to elevated ICP had a BCVA less than 0.5 (p < 0.0001). Management included steroids (53 patients/91%), acetazolamide (30 patients/52%), chemotherapy (20 patients/34%), radiation therapy (13 patients/22%), frequent lumbar punctures (12 patients/21%), and surgery (28 patients/48%). Visual acuity improved in 40 eyes (42%), with only 4 eyes (4%) experiencing deterioration. At a 12-month median follow-up period, 11 (19%) patients were dead, 10 (10%) eyes had poor vision (BCVA less than 0.1), and 21 (22%) eyes had BCVA 0.5 or better. CONCLUSIONS Various underlying pathologies can induce optic disc swelling in cancer patients, a grave condition capable of causing vision loss. Notably, tumor infiltration of the optic nerve tends to result in more profound visual impairment compared to papilledema due to elevated ICP. Timely detection is crucial, and immediate symptomatic treatment followed by addressing the underlying cause is essential to prevent irreversible optic nerve damage and vision loss in cancer patients.
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Affiliation(s)
- Yacoub A. Yousef
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Isra M. Sid Ahmed
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
- Alzarga Eye Center, Khartoum 11115, Sudan
| | - Danah Kanj Ahmad
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Mona Mohammad
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Hala Makahleh
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Reem AlJabari
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Fawzieh Alkhatib
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Mario Damiano Toro
- Chair and Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland
- Eye Clinic, Public Health Department, University of Naples Federico II, 80131 Naples, Italy
| | - Robert Rejdak
- Chair and Department of General and Pediatric Ophthalmology, Medical University of Lublin, 20-079 Lublin, Poland
| | - Mustafa Mehyar
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
| | - Ibrahim Alnawaiseh
- Department of Surgery/Ophthalmology, King Hussein Cancer Centre (KHCC), Amman 11941, Jordan; (I.M.S.A.); (R.A.); (M.M.); (I.A.)
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12
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Biousse V, Newman NJ. The expanding spectrum of idiopathic intracranial hypertension. Eye (Lond) 2023; 37:2361-2364. [PMID: 36509997 PMCID: PMC10397341 DOI: 10.1038/s41433-022-02361-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Revised: 11/18/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022] Open
Abstract
Once considered a rare and often difficult diagnosis in the era predating routine MRI, idiopathic intracranial hypertension has become an everyday concern in ophthalmology and neurology clinics where, especially in the latter, essentially every young overweight woman with headaches is initially presumed to have IIH. Has the diagnosis of IIH become too easy, and are we over-diagnosing IIH in this period of an accelerating obesity crisis? Or are we actually missing cases of IIH because they do not fit the classic clinical profile? We think it is both: at the same time IIH is being diagnosed in excess in obese women without papilledema, often resulting in unnecessary procedures, inappropriate treatment and even iatrogenic complications, the spectrum of this disorder is expanding to include a broad array of clinical presentations that involve multiple specialists beyond just the ophthalmologist and neurologist.
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Affiliation(s)
- Valérie Biousse
- Department of Ophthalmology, Emory University, Atlanta, GA, USA
- Department of Neurology, Emory University, Atlanta, GA, USA
| | - Nancy J Newman
- Department of Ophthalmology, Emory University, Atlanta, GA, USA.
- Department of Neurology, Emory University, Atlanta, GA, USA.
- Department of Neurological Surgery, Emory University, Atlanta, GA, USA.
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13
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Le Petit L, Roblot P, Durouchoux A, Kerdiles G, Liguoro D, Jecko V. How to understand an enlarged Meckel's cave? An anatomical study. Surg Radiol Anat 2023:10.1007/s00276-023-03177-w. [PMID: 37318563 DOI: 10.1007/s00276-023-03177-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Accepted: 05/27/2023] [Indexed: 06/16/2023]
Abstract
PURPOSE Dilatation of the trigeminal cavum, or Meckel's cave (MC), is usually considered a radiological sign of idiopathic intracranial hypertension. However, the normal size of the trigeminal cavum is poorly characterized. In this study, we describe the anatomy of this meningeal structure. METHODS We dissected 18 MCs and measured the length and width of the arachnoid web and its extension along the trigeminal nerve. RESULTS Arachnoid cysts were clearly attached to the ophthalmic (V1) and maxillary (V2) branches until they entered the cavernous sinus and foramen rotundum, respectively, without extension to the skull base. Arachnoid cysts were close to the mandibular branch toward the foramen ovale, with a median anteromedial extension of 2.5 [2.0-3.0] mm, lateral extension of 4.5 [3.0-6.0] mm, and posterior extension of 4.0 [3.2-6.0] mm. The trigeminal cavum arachnoid had a total width of 20.0 [17.5-25.0] mm and length of 24.5 [22.5-29.0] mm. CONCLUSION Our anatomical study revealed variable arachnoid extension, which may explain the variability in size of the trigeminal cavum in images and calls into question the value of this structure as a sign of idiopathic intracranial hypertension. The arachnoid web extends beyond the limits described previously, reaching almost double the radiological size of the cavum, particularly at the level of V3 afference of the trigeminal nerve. It is possible that strong adhesion of the arachnoid to the nerve elements prevents the formation of a true subarachnoid space that can be visualized by magnetic resonance imaging.
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Affiliation(s)
- Laetitia Le Petit
- Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France.
- Laboratory of Anatomy, University of Bordeaux, 33000, Bordeaux, France.
| | - Paul Roblot
- Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France
- Laboratory of Anatomy, University of Bordeaux, 33000, Bordeaux, France
| | - Arthur Durouchoux
- Department of Neurosurgery B, University Hospital of Bordeaux, Bordeaux, France
| | - Gaëlle Kerdiles
- Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France
- Laboratory of Anatomy, University of Bordeaux, 33000, Bordeaux, France
| | - Dominique Liguoro
- Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France
- Laboratory of Anatomy, University of Bordeaux, 33000, Bordeaux, France
| | - Vincent Jecko
- Department of Neurosurgery A, University Hospital of Bordeaux, Place Amélie Raba-Léon, 33076, Bordeaux, France
- Laboratory of Anatomy, University of Bordeaux, 33000, Bordeaux, France
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14
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Roemer SN, Friedrich EB, Kettner M, Rauzi M, Schub P, Kulikovski J, Janitschke D, Stögbauer J, Lochner P. Transorbital sonography and MRI reliability to assess optic nerve sheath diameter in idiopathic intracranial hypertension. J Neuroimaging 2023; 33:375-380. [PMID: 36859645 DOI: 10.1111/jon.13092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/08/2023] [Accepted: 02/08/2023] [Indexed: 03/03/2023] Open
Abstract
BACKGROUND AND PURPOSE The purpose of this study was to evaluate the performance of magnetic resonance imaging (MRI) in measuring the optic nerve sheath diameter (ONSD) compared to the established method transorbital sonography (TOS) in patients with idiopathic intracranial hypertension (IIH). METHODS Twenty-three patients with IIH were prospectively included applying IIH diagnostic criteria. All patients received a lumbar puncture with assessment of the cerebrospinal fluid (CSF) opening pressure to assure the IIH diagnosis. Measurement of ONSD was performed 3 mm posterior to inner sclera surface in B-TOS by an expert examiner, while three independent neuroradiologists took measurements in axial T-weighted MRI examinations. The sella turcica with the pituitary gland (and potential presence of an empty sella) and the trigeminal cavity were also assessed on sagittal and transversal T1-weighted MRI images by one independent neuroradiologist. RESULTS The means of ONSD between ultrasound and MRI measurements were 6.3 mm (standard deviation [SD] = 0.6 mm) and 6.2 mm (SD = 0.8 mm). The interrater reliability between three neuroradiologists showed a high interclass correlation coefficient (ICC) (confidence interval: .573 < ICC < .8; p < .001). In patients with an empty sella, the ONSD evaluated by MRI was 6.6 mm, while measuring 6.1 mm in patients without empty sella. No correlation between CSF opening pressure and ONSD was found. CONCLUSIONS MRI can reliably measure ONSD and yields similar results compared to TOS in patients with IIH. Moreover, patients with empty sella showed significantly larger ONSD than patients without empty sella.
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Affiliation(s)
- Sebastian Niclas Roemer
- Department of Neurology, University Hospital, LMU Munich, Munich, Germany.,Institute for Stroke and Dementia Research (ISD), University Hospital, LMU Munich, Munich, Germany
| | | | - Michael Kettner
- Department of Neuroradiology, Saarland University Medical Center, Homburg, Germany
| | - Martina Rauzi
- Department of Neurology, Saarland University Medical Center, Homburg, Germany
| | - Peter Schub
- Department of Neuroradiology, Saarland University Medical Center, Homburg, Germany
| | - Johann Kulikovski
- Department of Neuroradiology, Saarland University Medical Center, Homburg, Germany
| | - Daniel Janitschke
- Department of Neurology, Saarland University Medical Center, Homburg, Germany
| | - Jakob Stögbauer
- Department of Neurology, Saarland University Medical Center, Homburg, Germany
| | - Piergiorgio Lochner
- Department of Neurology, Saarland University Medical Center, Homburg, Germany
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15
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Korsbæk JJ, Jensen RH, Høgedal L, Molander LD, Hagen SM, Beier D. Diagnosis of idiopathic intracranial hypertension: A proposal for evidence-based diagnostic criteria. Cephalalgia 2023; 43:3331024231152795. [PMID: 36786317 DOI: 10.1177/03331024231152795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/15/2023]
Abstract
BACKGROUND Based on expert opinion, abducens nerve palsy and a neuroimaging criterion (≥3 neuroimaging signs suggestive of elevated intracranial pressure) were added to the diagnostic criteria for idiopathic intracranial hypertension. Our objective was to validate this. METHODS This prospective study included patients with new-onset idiopathic intracranial hypertension for a standardized work-up: interview, neuro-ophthalmological exam, lumbar puncture, neuroimaging. Neuroimaging was evaluated by a blinded neuroradiologist. RESULTS We included 157 patients classified as idiopathic intracranial hypertension (56.7%), probable idiopathic intracranial hypertension (1.9%), idiopathic intracranial hypertension without papilledema (idiopathic intracranial hypertension-without papill edema; 0%), suggested idiopathic intracranial hypertension-without papill edema (4.5%), or non-idiopathic intracranial hypertension (36.9%). Moderate suprasellar herniation was more common in idiopathic intracranial hypertension than non-idiopathic intracranial hypertension (71.4% versus 47.4%, p < 0.01), as was perioptic nerve sheath distension (69.8% versus 29.3%, p < 0.001), flattening of the globe (67.1% versus 11.1%, p < 0.001) and transverse sinus stenosis (60.2% versus 18.9%, p < 0.001). Abducens nerve palsy was of no diagnostic significance. Sensitivity of ≥3 neuroimaging signs was 59.5% and specificity was 93.5%. CONCLUSION Moderate suprasellar herniation, distension of the perioptic nerve sheath, flattening of the globe and transverse sinus stenosis were associated with idiopathic intracranial hypertension. We propose that idiopathic intracranial hypertension can be defined by two out of three objective findings (papilledema, opening pressure ≥25 cm cerebrospinal fluid and ≥3 neuroimaging signs).
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Affiliation(s)
- Johanne Juhl Korsbæk
- Danish Headache Center, Department of Neurology, Rigshospitalet-Glostrup, University of Copenhagen, Denmark
| | - Rigmor Højland Jensen
- Danish Headache Center, Department of Neurology, Rigshospitalet-Glostrup, University of Copenhagen, Denmark
| | - Lisbeth Høgedal
- Department of Radiology, Odense University Hospital, Denmark
| | | | - Snorre Malm Hagen
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Denmark
| | - Dagmar Beier
- Department of Neurology, Odense University Hospital, Denmark.,Department of Clinical Research, University of Southern Denmark, Odense, Denmark.,OPEN, Odense Patient data Explorative Network, Odense University Hospital, Denmark
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16
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Presumptive Idiopathic Intracranial Hypertension Based on Neuroimaging Findings: A Referral Pattern Study. J Neuroophthalmol 2023; 43:55-62. [PMID: 36166790 DOI: 10.1097/wno.0000000000001660] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Radiologic findings of intracranial hypertension (RAD-IH) are common in idiopathic intracranial hypertension (IIH) patients. Paralleling the increasing rates of obesity, the burden of IIH is growing. Urgent neuro-ophthalmology consultations for possible IIH in patients with incidentally detected RAD-IH are increasing, with many patients receiving unnecessary lumbar punctures (LPs) and treatments. This retrospective observational study aimed to determine the prevalence of neuro-ophthalmology consultations for RAD-IH, rate of funduscopic examination by referring providers, prevalence of papilledema, outcomes after neuro-ophthalmic evaluation, and rates of misdiagnosis. METHODS Records of 1,262 consecutive new patients seen in one neuro-ophthalmology clinic from January 2019 to January 2020 were reviewed. We identified patients who were: 1) referred with concern for IIH because of findings of RAD-IH; 2) referred for "papilledema"; 3) referred with a diagnosis of IIH; and 4) referred for spontaneous cranial cerebrospinal fluid (CSF) leaks. In addition to basic demographic profiles for all groups, detailed information was collected for patients referred solely for RAD-IH, including referral patterns, prior history of IIH, previous LPs, prior medical or surgical treatment(s), risk factors for increased intracranial pressure (ICP), presenting symptoms, radiologic features observed on neuroimaging, and final disposition. When available, the neuroimaging was reviewed by an expert neuroradiologist. RESULTS Of 1,262 consecutive new patients, 66 (5%) were referred specifically for RAD-IH; most referrals came from neurologists (58%); 8/66 (12%) patients had papilledema; 16/66 (24%) patients had prior LP and 13/66 (20%) were already treated based on MRI findings; and 22/66 (33%) patients had ≤2 RAD-IH. Only 34/66 (52%) of patients referred for RAD-IH had prior funduscopic examinations. We confirmed papilledema in 26/82 (32%) patients referred for "papilledema." Only 29/83 (35%) patients referred with a diagnosis of IIH had active papilledema, and 3/16 (19%) patients with spontaneous CSF leaks had papilledema. In total, 247/1,262 (20%) new patients were referred to our clinic over 1 year with concern for IIH, among whom only 66 (27%) were confirmed to have active IIH with papilledema. CONCLUSIONS One in 5 new patient referrals seen in our neuro-ophthalmology clinic were referred because of concern for increased ICP, but only 1/4 had active papilledema. Most patients referred for isolated RAD-IH do not have papilledema, many having undergone unnecessary LPs and treatments. The burden of these "rule-out IIH" consultations is overwhelming and will only continue to increase with the concurrent rise of obesity and IIH, straining the already limited neuro-ophthalmologic resources available in the US.
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17
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Dattilo M. Noninvasive methods to monitor intracranial pressure. Curr Opin Neurol 2023; 36:1-9. [PMID: 36630209 DOI: 10.1097/wco.0000000000001126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
PURPOSE OF REVIEW Intracranial pressure (ICP) is determined by the production of and outflow facility of cerebrospinal fluid. Since alterations in ICP are implicated in several vision-threatening and life-threatening diseases, measurement of ICP is necessary and common. All current clinical methods to measure ICP are invasive and carry the risk for significant side effects. Therefore, the development of accurate, reliable, objective, and portal noninvasive devices to measure ICP has the potential to change the practice of medicine. This review discusses recent advances and barriers to the clinical implementation of noninvasive devices to determine ICP. RECENT FINDINGS Many noninvasive methods to determine ICP have been developed. Although most have significant limitations limiting their clinical utility, several noninvasive methods have shown strong correlations with invasively obtained ICP and have excellent potential to be developed further to accurately quantify ICP and ICP changes. SUMMARY Although invasive methods remain the mainstay for ICP determination and monitoring, several noninvasive biomarkers have shown promise to quantitatively assess and monitor ICP. With further refinement and advancement of these techniques, it is highly possible that noninvasive methods will become more commonplace and may complement or even supplant invasively obtained methods to determine ICP in certain situations.
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Affiliation(s)
- Michael Dattilo
- Emory Eye Center, Neuro-Ophthalmology Division, Emory University School of Medicine, Atlanta, Georgia, USA
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18
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Abstract
PURPOSE OF REVIEW Idiopathic intracranial hypertension (IIH) is a disorder of raised intracranial pressure (ICP). Although the majority of patients with IIH present classically with headache and papilledema, some patients may have unusual presentations or manifestations. Recent advancements in neuroimaging have facilitated the identification of other presentations associated with IIH. This review provides an overview of the expanding clinical spectrum of IIH. RECENT FINDINGS Presentations of IIH that are considered unusual include highly asymmetric or unilateral papilledema, IIH without papilledema, and IIH associated with cranial nerve involvement. These presentations likely reflect differences in the way cerebrospinal fluid (CSF) pressure is transmitted intracranially. Radiological signs of intracranial hypertension are increasingly recognized in patients with IIH and provide further insights into the effects of raised ICP on intracranial structures. Osseous changes in the skull base leading to formation of meningoceles and encephaloceles have been identified in patients with IIH, spontaneous skull base CSF leak, and drug-resistant temporal lobe epilepsy, suggesting a possible association. SUMMARY Clinicians should be familiar with the expanding clinical spectrum of IIH and the implications for the management of these presentations.
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Affiliation(s)
- Benson S. Chen
- John van Geest Centre for Brain Repair and MRC Mitochondrial Biology Unit, Department of Clinical Neurosciences, University of Cambridge
- Cambridge Eye Unit, Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, United Kingdom
| | - John O.T. Britton
- John van Geest Centre for Brain Repair and MRC Mitochondrial Biology Unit, Department of Clinical Neurosciences, University of Cambridge
- Cambridge Eye Unit, Addenbrooke's Hospital, Cambridge University Hospitals, Cambridge, United Kingdom
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19
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Robelin F, Lenfant M, Ricolfi F, Béjot Y, Comby PO. [Idiopathic intracranial hypertension: From physiopathological mechanisms to therapeutic decision]. Rev Med Interne 2022; 43:661-668. [PMID: 36114039 DOI: 10.1016/j.revmed.2022.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 08/16/2022] [Accepted: 08/28/2022] [Indexed: 11/30/2022]
Abstract
Clinical features include visual disturbances, headaches, and pulsatile tinnitus that can be associated with reduced quality of life, and a risk of irreversible visual impairment in some cases. Obese women of childbearing age represent the main at-risk population, and the incidence of the disease is increasing because of rising prevalence of obesity worldwide. In addition, an imbalance in sex hormones is reported as a contributing risk factor. The pathophysiology of idiopathic intracranial hypertension involves a disturbance of the evacuation pathway of intracranial fluids caused by the increase in intracranial venous pressure. Brain imaging is useful for diagnosis with several signs including bilateral stenosis of the transverse sinuses that plays a major role in the pathogenesis of the disease by creating a positive feedback loop that increases intracranial venous hypertension and contributes to clinical manifestations. Treatment aims to relieve symptoms and prevent permanent visual impairment. Drug therapies including acetazolamide and topiramate have moderate effectiveness. Among invasive treatments, transverse sinus stenting seems to be the most interesting option to consider in drug-resistant patients. Weight loss remains essential to achieve a sustainable improvement by reducing central venous pressure. Future randomized trials are expected to reach a consensus on this treatment.
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Affiliation(s)
- F Robelin
- Service de neuroradiologie, CHU François Mitterrand Dijon, 14, rue Paul Gaffarel, 21000 Dijon, France.
| | - M Lenfant
- Service de neuroradiologie, CHU François Mitterrand Dijon, 14, rue Paul Gaffarel, 21000 Dijon, France
| | - F Ricolfi
- Service de neuroradiologie, CHU François Mitterrand Dijon, 14, rue Paul Gaffarel, 21000 Dijon, France; Université de Bourgogne, BP 27877-21078, Dijon Cedex, France
| | - Y Béjot
- Service de neurologie, CHU François Mitterrand Dijon, 14, rue Paul Gaffarel, 21000 Dijon, France; Université de Bourgogne, BP 27877-21078, Dijon Cedex, France
| | - P-O Comby
- Service de neuroradiologie, CHU François Mitterrand Dijon, 14, rue Paul Gaffarel, 21000 Dijon, France; Université de Bourgogne, BP 27877-21078, Dijon Cedex, France
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20
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Kuzan BN, Ilgın C, Kuzan TY, Dericioğlu V, Kahraman-Koytak P, Uluç K, Çimşit NÇ. Accuracy and reliability of magnetic resonance imaging in the diagnosis of idiopathic intracranial hypertension. Eur J Radiol 2022; 155:110491. [PMID: 36007323 DOI: 10.1016/j.ejrad.2022.110491] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 07/26/2022] [Accepted: 08/15/2022] [Indexed: 11/29/2022]
Abstract
PURPOSE To determine the diagnostic utility of brain magnetic resonance imaging (MRI) findings in patients with idiopathic intracranial hypertension (IIH) and to investigate the significance of evaluating radiological findings together with neurological and ophthalmological data in the diagnosis of IIH. MATERIALS AND METHODS All consecutive patients diagnosed with IIH in our tertiary neuro-ophthalmology center between January 1, 2018 and March 15, 2020, were included in the study. The clinical, radiological, and ophthalmological findings of IIH patients were compared with the control group with similar demographic characteristics. RESULTS A total of 98 patients, 49 cases and 49 controls, were included in the study. Lateral ventricular index had the highest area under the curve (AUC) value (0.945) for prediction of disease group followed by sella height category (AUC = 0.915) and optic nerve tortuosity (AUC = 0.855) According to the multivariate model we developed, caudate index (OR = 0.572, 95% CI 0.329-0.996), lateral ventricle index (OR = 3.969, 95% CI 1.851-8.509) and bilateral optic nerve tortuosity (OR = 22,784, 95% CI 2.432-213.450) were significant predictors for disease group. CONCLUSION Tortuosity in the optic nerve, lateral ventricular index and caudate index can be used as MRI parameters supporting the diagnosis of IIH in clinically suspicious cases. A holistic approach to the clinical and radiological findings of the cases in the diagnosis of IIH can prevent overdiagnosis and enable early correct diagnosis.
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Affiliation(s)
- Beyza Nur Kuzan
- Department of Radiology, Kartal Dr. Lütfi Kırdar City Hospital, Istanbul, Turkey.
| | - Can Ilgın
- Department of Public Health, School of Medicine, Marmara University, Istanbul, Turkey.
| | - Taha Yusuf Kuzan
- Department of Radiology, Sancaktepe Sehit Prof. Dr. Ilhan Varank Training and Research Hospital, Istanbul, Turkey.
| | - Volkan Dericioğlu
- Department of Ophthalmology, School of Medicine, Marmara University, Istanbul, Turkey.
| | | | - Kayıhan Uluç
- Department of Neurology, School of Medicine, Marmara University, Istanbul, Turkey.
| | - Nuri Çagatay Çimşit
- Department of Radiology, School of Medicine, Marmara University, Istanbul, Turkey.
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Sarrami AH, Bass DI, Rutman AM, Alexander MD, Aksakal M, Zhu C, Levitt MR, Mossa-Basha M. Idiopathic intracranial hypertension imaging approaches and the implications in patient management. Br J Radiol 2022; 95:20220136. [PMID: 35522777 PMCID: PMC10162046 DOI: 10.1259/bjr.20220136] [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: 01/27/2022] [Revised: 04/05/2022] [Accepted: 04/27/2022] [Indexed: 11/05/2022] Open
Abstract
Idiopathic intracranial hypertension (IIH) represents a clinical disease entity without a clear etiology, that if left untreated, can result in severe outcomes, including permanent vision loss. For this reason, early diagnosis and treatment is necessary. Historically, the role of cross-sectional imaging has been to rule out secondary or emergent causes of increased intracranial pressure, including tumor, infection, hydrocephalus, or venous thrombosis. MRI and MRV, however, can serve as valuable imaging tools to not only rule out causes for secondary intracranial hypertension but can also detect indirect signs of IIH resultant from increased intracranial pressure, and demonstrate potentially treatable sinus venous stenosis. Digital subtraction venographic imaging also plays a central role in both diagnosis and treatment, providing enhanced anatomic delineation and temporal flow evaluation, quantitative assessment of the pressure gradient across a venous stenosis, treatment guidance, and immediate opportunity for endovascular therapy. In this review, we discuss the multiple modalities for imaging IIH, their limitations, and their contributions to the management of IIH.
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Affiliation(s)
- Amir Hossein Sarrami
- Department of Radiology, Stanford University School of Medicine, Palo Alto, CA, United States
| | - David I. Bass
- Department of Radiology, Stanford University School of Medicine, Palo Alto, CA, United States
| | | | - Matthew D Alexander
- Department of Radiology, University of Utah, Salt Lake City, Utah, United States
| | - Mehmet Aksakal
- Department of Radiology, University of Washington, Seattle, United States
| | - Chengcheng Zhu
- Department of Radiology, University of Washington, Seattle, United States
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22
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Ebrahimzadeh SA, Du E, Chang YM, Bouffard M, Loth F, Bhadelia RA. MRI findings differentiating tonsillar herniation caused by idiopathic intracranial hypertension from Chiari I malformation. Neuroradiology 2022; 64:2307-2314. [PMID: 35697809 DOI: 10.1007/s00234-022-02993-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2022] [Accepted: 06/02/2022] [Indexed: 11/24/2022]
Abstract
PURPOSE Some patients with idiopathic intracranial hypertension (IIH) have cerebellar tonsillar herniation ≥ 5 mm mimicking Chiari malformation I (CMI), which can result in misdiagnosis and unjustified treatment. Our purpose was to identify IIH patients with tonsillar herniation ≥ 5 mm (IIHTH) and compare with CMI patients to assess imaging findings that could distinguish the two conditions. METHODS Ninety-eight patients with IIH, 81 patients with CMI, and 99 controls were retrospectively assessed. Two neuroradiologists blindly reviewed MR images. IIHTH patients were compared with CMI patients and controls regarding the extent of tonsillar herniation (ETH), bilateral transverse sinus stenosis (BTSS), hypophysis-sella ratio (HSR), and bilateral tortuosity of optic nerve (BTON). RESULTS 13/98 (13.2%) IIH patients had tonsillar herniation ≥ 5 mm (IIHTH) and were significantly younger and had higher BMI compared with CMI patients and controls. ETH was significantly less in the IIHTH than CMI (6.5 ± 2.4 mm vs. 10.9 ± 4.4 mm; p < 0.001). BTSS and HSR < 0.5 were more common in IIHTH than CMI (p < 0.001 and p = 0.003, respectively). No differences were seen between CMI and controls. BTON was significantly more common in IIHTH compared to control (p = 0.01) but not to the CMI (p = 0.36). Sensitivity and specificity to differentiate IIHTH from CMI were 69.2% and 96.1% for BTSS and 69.2% and 75.3% for HSR < 0.5. CONCLUSION The presence of BTSS and/or HSR < 0.5 in patients with ETH ≥ 5 mm should suggest further evaluation to exclude IIH before considering CMI surgery.
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Affiliation(s)
- Seyed Amir Ebrahimzadeh
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA.
| | - Elizabeth Du
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA
| | - Yu-Ming Chang
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA
| | - Marc Bouffard
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Francis Loth
- Department of Mechanical and Industrial Engineering, Northeastern University, Boston, MA, USA
| | - Rafeeque A Bhadelia
- Department of Radiology, Beth Israel Deaconess Medical Center, Harvard Medical School, WCB90, 330 Brookline Ave, Boston, MB, 02215, USA
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23
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Reply. Ophthalmology 2022; 129:e80-e81. [DOI: 10.1016/j.ophtha.2022.03.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 03/09/2022] [Accepted: 03/11/2022] [Indexed: 11/21/2022] Open
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Togni C, Fierz F, Pohl H, Weber KP, Wegener S. [CME: Idiopathic Intracranial Hypertension]. PRAXIS 2022; 111:250-258. [PMID: 35414254 DOI: 10.1024/1661-8157/a003838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
CME: Idiopathic Intracranial Hypertension Abstract. Idiopathic intracranial hypertension is a pressure-induced secondary headache disorder and optic neuropathy. It primarily affects obese women of childbearing age and poses an interdisciplinary challenge both diagnostically and therapeutically. The most common symptom of this disorder are headaches frequently accompanied by photo- and/or phonophobia, whose semiology often resembles that of migraine, followed by transient visual obscurations and pulsatile tinnitus. While protection of visual acuity and visual fields are of first therapeutical priority, adequate headache treatment also plays a key role. In the majority of cases, conservative treatment including weight loss and pharmacological therapy is sufficient. In case of a fulminant disease course or loss of visual function, interventional strategies can be applied additionally. Headache treatment is guided by the predominant semiology.
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Affiliation(s)
- Claudio Togni
- Klinik für Neurologie, Universitätsspital Zürich und Universität Zürich, Zürich, Schweiz
| | - Fabienne Fierz
- Augenklinik, Universitätsspital Zürich und Universität Zürich, Zürich, Schweiz
| | - Heiko Pohl
- Klinik für Neurologie, Universitätsspital Zürich und Universität Zürich, Zürich, Schweiz
| | - Konrad P Weber
- Klinik für Neurologie, Universitätsspital Zürich und Universität Zürich, Zürich, Schweiz
- Augenklinik, Universitätsspital Zürich und Universität Zürich, Zürich, Schweiz
| | - Susanne Wegener
- Klinik für Neurologie, Universitätsspital Zürich und Universität Zürich, Zürich, Schweiz
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Wang MTM, Prime ZJ, Xu W, McKelvie J, Papchenko T, Padungkiatsagul T, Moss HE, Danesh-Meyer HV. Diagnostic performance of neuroimaging in suspected idiopathic intracranial hypertension. J Clin Neurosci 2022; 96:56-60. [PMID: 34974249 PMCID: PMC9159900 DOI: 10.1016/j.jocn.2021.12.024] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 11/18/2021] [Accepted: 12/21/2021] [Indexed: 02/03/2023]
Abstract
The diagnostic utility of neuroradiologic signs associated with idiopathic intracranial hypertension (IIH) for the evaluation of patients presenting with papilloedema remains yet to be elucidated. This multicentre retrospective cohort study assessed consecutive patients presenting with suspected papilloedema to Auckland District Health Board (NZ) and Stanford University Medical Centre (US), between 2005 and 2019, undergoing magnetic resonance imaging and venography (MRI/MRV) or computed tomography and venography (CT/CTV) prior to lumbar puncture assessment for diagnostic suspicion of IIH. Data were collected regarding demographic, clinical, radiologic, and lumbar puncture parameters, and the diagnosis of IIH was determined according to the Friedman criteria for primary pseudotumor cerebri syndrome. A total of 204 participants (174 females; mean ± SD age 29.9 ± 12.2 years) were included, and 156 (76.5%) participants fulfilled the diagnostic criteria for IIH. The presence of any IIH-associated radiologic sign on MRI/MRV demonstrated a sensitivity (95% CI) of 74.8% (65.8%-82.0%) and specificity (95% CI) of 94.7% (82.7%-98.5%), while radiologic signs on CT/CTV exhibited a sensitivity (95% CI) of 61.0% (49.9%-71.2%) and specificity (95% CI) of 100.0% (83.2%-100.0%). In summary, the modest sensitivities of radiologic signs of IIH would support the routine use of lumbar puncture assessment following neuroimaging to secure the diagnosis. However, the high specificities might lend limited support for the judicious deferment of lumbar puncture assessment among typical IIH demographic patients who consent to the inherent small risk of missed pathology, which has been proposed by some clinicians.
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Affiliation(s)
- Michael T. M. Wang
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand
| | - Zak J. Prime
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand
| | - William Xu
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand
| | - James McKelvie
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand
| | - Taras Papchenko
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand
| | - Tanyatuth Padungkiatsagul
- Department of Ophthalmology, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand,Department of Ophthalmology, Stanford University, Palo Alto, California, United States
| | - Heather E. Moss
- Department of Ophthalmology, Stanford University, Palo Alto, California, United States,Department of Neurology and Neurological Sciences, Stanford University, Palo Alto, California, United States
| | - Helen V. Danesh-Meyer
- Department of Ophthalmology, New Zealand National Eye Centre, University of Auckland, Auckland, New Zealand
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Moss HE, Margolin EA, Lee AG, Van Stavern GP. Should Lumbar Puncture Be Required to Diagnose Every Patient With Idiopathic Intracranial Hypertension? J Neuroophthalmol 2021; 41:379-384. [PMID: 34415272 PMCID: PMC9159906 DOI: 10.1097/wno.0000000000001373] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Heather E Moss
- Departments of Ophthalmology and Neurology & Neurological Sciences (HEM), Stanford University, Stanford, California; Department of Ophthalmology and Visual Sciences (EM), University of Toronto, Toronto, Ontario; Blanton Eye Institute (AGL), Houston Methodist Hospital, Houston, Texas; and Department of Ophthalmology and Visual Sciences (GPVS), Washington University in St. Louis School of Medicine, St. Louis, Missouri
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Jensen RH, Vukovic-Cvetkovic V, Korsbaek JJ, Wegener M, Hamann S, Beier D. Awareness, Diagnosis and Management of Idiopathic Intracranial Hypertension. Life (Basel) 2021; 11:718. [PMID: 34357090 PMCID: PMC8303648 DOI: 10.3390/life11070718] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/06/2021] [Accepted: 07/14/2021] [Indexed: 11/16/2022] Open
Abstract
The diagnosis and management of idiopathic intracranial hypertension (IIH) can be difficult and multiple medical subspecialities are often involved. Several national and international guidelines regarding the investigations and management of IIH have been published in recent years but still there is no consensus about the optimal organization of IIH-care. The objective of this review was to propose and describe a referral pathway and an organization scheme for diagnosis and management of IIH. An extensive search of existing literature was conducted and summarized. In total, 237 IIH-articles were identified and hereof 43 included. The clinical practice in our specialized IIH-clinic is characterized and described. We conclude that an educational campaign involving medical care providers and patients with chronic headaches is necessary. A detailed organizational proposal for a referral pathway and management of IIH patients based on the literature search and our clinical experience from a highly specialized IIH outpatient clinic is suggested and discussed.
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Affiliation(s)
- Rigmor Højland Jensen
- Danish Headache Center, Department of Neurology, Rigshospitalet, University of Copenhagen, 1165 København, Denmark; (V.V.-C.); (J.J.K.)
| | - Vlasta Vukovic-Cvetkovic
- Danish Headache Center, Department of Neurology, Rigshospitalet, University of Copenhagen, 1165 København, Denmark; (V.V.-C.); (J.J.K.)
| | - Johanne Juhl Korsbaek
- Danish Headache Center, Department of Neurology, Rigshospitalet, University of Copenhagen, 1165 København, Denmark; (V.V.-C.); (J.J.K.)
| | - Marianne Wegener
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 1165 København, Denmark; (M.W.); (S.H.)
| | - Steffen Hamann
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, 1165 København, Denmark; (M.W.); (S.H.)
| | - Dagmar Beier
- Department of Neurology, Odense University Hospital, 5000 Odense, Denmark;
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Higgins JN, Pickard JD. A paradigm for chronic fatigue syndrome: caught between idiopathic intracranial hypertension and spontaneous intracranial hypotension; caused by cranial venous outflow obstruction. FATIGUE : BIOMEDICINE, HEALTH & BEHAVIOR 2021; 9:139-147. [PMID: 36514384 PMCID: PMC7613918 DOI: 10.1080/21641846.2021.1956223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Background Clinical similarities between chronic fatigue syndrome and idiopathic intracranial hypertension, supported by measurements of intracranial pressure, invite suggestions that they may be connected, the first representing a mild version of the second. Yet, if this is to be the basis for a structural explanation for chronic fatigue syndrome, it already seems incomplete, failing to explain cases where disability seems disproportionate. Is there some other confounding variable? Purpose To refine, in this theoretical paper, an earlier model connecting chronic fatigue syndrome with idiopathic intracranial hypertension to allow for a cerebrospinal fluid (CSF) leak. Model In this model, the primary structural problem is acquired obstruction to cranial venous outflow. This obstruction can take different forms, may be intermittent and subtle, and even be mistaken for normal venous anatomy, yet would be the driving force behind a tendency towards increased intracranial pressure. This chronic elevation of intracranial pressure stresses the dural membrane maintaining the integrity of the subarachnoid space, which can rupture at a weak point, allowing CSF to leak away and intracranial pressure to fall. The clinical manifestation of this disorder is the product of the severity of cranial venous outflow compromise and of the competing forces on intracranial pressure. In some instances, a CSF leak will mitigate the effects of venous compromise, in others it will compound it, producing a disease spectrum ranging through idiopathic intracranial hypertension, chronic fatigue syndrome, fibromyalgia, and spontaneous intracranial hypotension. Conclusion In chronic fatigue syndrome a normal intracranial pressure does not exclude significant physiological disturbance.
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Affiliation(s)
- JN Higgins
- Department of Radiology, Box 218, Level 4, Addenbrooke’s Hospital, Cambridge, UK
| | - JD Pickard
- Department of Neurosurgery, Addenbrooke’s Hospital, Cambridge, UK
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Beyond the AJR: Isolated Incidentally Detected Imaging Findings Associated With Idiopathic Intracranial Hypertension are Common in Patients Without Papilledema. AJR Am J Roentgenol 2021. [PMID: 34191546 DOI: 10.2214/ajr.21.26469] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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