Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too?
Background: The purpose of this study was to evaluate the difference in the occurrence of the various "traditional" imaging signs of intracranial hypertension (IIH) on magnetic resonance imaging (MRI) in patients with idiopathic (IIH) and secondary intracranial hypertension. Materials and...
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| Format: | Article |
| Language: | English |
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Wolters Kluwer Medknow Publications
2013-01-01
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| Series: | Annals of Indian Academy of Neurology |
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| Online Access: | http://www.annalsofian.org/article.asp?issn=0972-2327;year=2013;volume=16;issue=2;spage=229;epage=233;aulast=Hingwala |
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| author | Divyata R Hingwala Chandrasekharan Kesavadas Bejoy Thomas Tirur R Kapilamoorthy P Sankara Sarma |
| author_facet | Divyata R Hingwala Chandrasekharan Kesavadas Bejoy Thomas Tirur R Kapilamoorthy P Sankara Sarma |
| author_sort | Divyata R Hingwala |
| collection | DOAJ |
| description | Background: The purpose of this study was to evaluate the difference in the occurrence of the various "traditional" imaging signs of intracranial hypertension (IIH) on magnetic resonance imaging (MRI) in patients with idiopathic (IIH) and secondary intracranial hypertension. Materials and Methods: In a retrospective analysis, the MRI findings of 21 patients with IIH and 60 patients with secondary intracranial hypertension (41 with tumors; 19 with intracranial venous hypertension) were evaluated for the presence or absence of various "traditional" imaging signs of IIH (perioptic nerve sheath distention, vertical buckling of optic nerve, globe flattening, optic nerve head protrusion and empty sella) using the Fisher′s exact test. Odds ratios were also calculated. Statistical Package for the Social Sciences version 17.0 was used for statistical analysis. Subgroup analysis of the IIH versus tumors and IIH versus venous hypertension were performed. Results: Optic nerve head protrusion and globe flattening were significantly associated with IIH. There was no statistically significant difference in the occurrence of rest of the findings. On subgroup analysis, globe flattening and optic nerve head protrusion occurred significantly more often in IIH than in tumors. However, there was no statistically significant difference in the occurrence of any of these findings in patients with IIH and venous hypertension. Conclusions: IIH is a diagnosis of exclusion. While secondary causes of raised intracranial pressure (ICP) have obvious clinical findings on MRI, some conditions like cerebral venous thrombosis may have subtle signs and differentiating between primary and secondary causes may be difficult. In the absence of any evident cause of raised ICP, presence of optic nerve head protrusion or globe flattening can suggest the diagnosis of IIH. |
| first_indexed | 2024-12-24T05:17:55Z |
| format | Article |
| id | doaj.art-8cc0080bf3864c589bf836e484784127 |
| institution | Directory Open Access Journal |
| issn | 0972-2327 1998-3549 |
| language | English |
| last_indexed | 2024-12-24T05:17:55Z |
| publishDate | 2013-01-01 |
| publisher | Wolters Kluwer Medknow Publications |
| record_format | Article |
| series | Annals of Indian Academy of Neurology |
| spelling | doaj.art-8cc0080bf3864c589bf836e4847841272022-12-21T17:13:31ZengWolters Kluwer Medknow PublicationsAnnals of Indian Academy of Neurology0972-23271998-35492013-01-0116222923310.4103/0972-2327.112476Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too?Divyata R HingwalaChandrasekharan KesavadasBejoy ThomasTirur R KapilamoorthyP Sankara SarmaBackground: The purpose of this study was to evaluate the difference in the occurrence of the various "traditional" imaging signs of intracranial hypertension (IIH) on magnetic resonance imaging (MRI) in patients with idiopathic (IIH) and secondary intracranial hypertension. Materials and Methods: In a retrospective analysis, the MRI findings of 21 patients with IIH and 60 patients with secondary intracranial hypertension (41 with tumors; 19 with intracranial venous hypertension) were evaluated for the presence or absence of various "traditional" imaging signs of IIH (perioptic nerve sheath distention, vertical buckling of optic nerve, globe flattening, optic nerve head protrusion and empty sella) using the Fisher′s exact test. Odds ratios were also calculated. Statistical Package for the Social Sciences version 17.0 was used for statistical analysis. Subgroup analysis of the IIH versus tumors and IIH versus venous hypertension were performed. Results: Optic nerve head protrusion and globe flattening were significantly associated with IIH. There was no statistically significant difference in the occurrence of rest of the findings. On subgroup analysis, globe flattening and optic nerve head protrusion occurred significantly more often in IIH than in tumors. However, there was no statistically significant difference in the occurrence of any of these findings in patients with IIH and venous hypertension. Conclusions: IIH is a diagnosis of exclusion. While secondary causes of raised intracranial pressure (ICP) have obvious clinical findings on MRI, some conditions like cerebral venous thrombosis may have subtle signs and differentiating between primary and secondary causes may be difficult. In the absence of any evident cause of raised ICP, presence of optic nerve head protrusion or globe flattening can suggest the diagnosis of IIH.http://www.annalsofian.org/article.asp?issn=0972-2327;year=2013;volume=16;issue=2;spage=229;epage=233;aulast=HingwalaIntracranial hypertensionmagnetic resonance imagingsigns |
| spellingShingle | Divyata R Hingwala Chandrasekharan Kesavadas Bejoy Thomas Tirur R Kapilamoorthy P Sankara Sarma Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too? Annals of Indian Academy of Neurology Intracranial hypertension magnetic resonance imaging signs |
| title | Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too? |
| title_full | Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too? |
| title_fullStr | Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too? |
| title_full_unstemmed | Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too? |
| title_short | Imaging signs in idiopathic intracranial hypertension: Are these signs seen in secondary intracranial hypertension too? |
| title_sort | imaging signs in idiopathic intracranial hypertension are these signs seen in secondary intracranial hypertension too |
| topic | Intracranial hypertension magnetic resonance imaging signs |
| url | http://www.annalsofian.org/article.asp?issn=0972-2327;year=2013;volume=16;issue=2;spage=229;epage=233;aulast=Hingwala |
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