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| {{Short description|Neuroradiologic finding of splenial pathology}} | |||
| The boomerang sign is a radiological finding observed on magnetic resonance imaging (MRI) of the brain, particularly in diffusion-weighted imaging (DWI) sequences. It refers to a characteristic boomerang-shaped area of restricted diffusion in the splenium of the ] due to ].<ref>{{cite journal |last1=Pandian |first1=Jeyaraj Durai |last2=Henderson |first2=Robert D. |title= |
The boomerang sign is a radiological finding observed on magnetic resonance imaging (MRI) of the brain, particularly in diffusion-weighted imaging (DWI) sequences. It refers to a characteristic boomerang-shaped area of restricted diffusion in the splenium of the ] due to ].<ref>{{cite journal |last1=Pandian |first1=Jeyaraj Durai |last2=Henderson |first2=Robert D. |title="Boomerang sign" in the splenium of the corpus callosum |journal=Medical Journal of Australia |date=5 December 2005 |volume=183 |issue=11 |page=628 |doi=10.5694/j.1326-5377.2005.tb00059.x |pmid=16336154 |url=https://www.mja.com.au/journal/2005/183/11/boomerang-sign-splenium-corpus-callosum |access-date=5 January 2025 |issn=0025-729X}}</ref> This sign is associated with various neurological conditions and is considered a non-specific marker of splenial pathology, often reversible depending on the underlying cause.<ref name=rsna>{{cite journal |last1=Starkey |first1=Jay |last2=Kobayashi |first2=Nobuo |last3=Numaguchi |first3=Yuji |last4=Moritani |first4=Toshio |title=Cytotoxic Lesions of the Corpus Callosum That Show Restricted Diffusion: Mechanisms, Causes, and Manifestations |journal=RadioGraphics |date=March 2017 |volume=37 |issue=2 |pages=562–576 |doi=10.1148/rg.2017160085 |pmid=28165876 |url=https://pubs.rsna.org/doi/10.1148/rg.2017160085 |access-date=5 January 2025 |issn=0271-5333}}</ref><ref>{{cite journal |last1=Mathew |first1=Thomas |title="Boomerang Plus Sign" in Rickettsial Encephalitis |journal=Pediatric Neurology |date=2016 |volume=56 |pages=88–89 |doi=10.1016/j.pediatrneurol.2015.03.011 |pmid=26130192 |url=https://www.pedneur.com/article/S0887-8994(15)00150-2/fulltext |access-date=5 January 2025}}</ref> | ||
| ==Anatomy and appearance== | ==Anatomy and appearance== | ||
| The splenium of the corpus callosum is the posterior part of the corpus callosum, a major white matter structure connecting the two cerebral hemispheres. On MRI, the boomerang sign appears as a boomerang-shaped hyperintense area on DWI. There is a corresponding low signal intensity on the apparent diffusion coefficient (ADC) map, indicating true restricted diffusion. The sign is often localized within the central or posterior splenium.<ref name=rsna/> | The splenium of the corpus callosum is the posterior part of the corpus callosum, a major white matter structure connecting the two cerebral hemispheres. On MRI, the boomerang sign appears as a boomerang-shaped hyperintense area on DWI. There is a corresponding low signal intensity on the apparent diffusion coefficient (ADC) map, indicating true restricted diffusion. The sign is often localized within the central or posterior splenium.<ref name=rsna/> | ||
| ==References== | ==References== | ||
| {{reflist}} | {{reflist}} | ||
| ] | |||
Latest revision as of 17:51, 8 January 2025
Neuroradiologic finding of splenial pathologyThe boomerang sign is a radiological finding observed on magnetic resonance imaging (MRI) of the brain, particularly in diffusion-weighted imaging (DWI) sequences. It refers to a characteristic boomerang-shaped area of restricted diffusion in the splenium of the corpus callosum due to cytotoxic edema. This sign is associated with various neurological conditions and is considered a non-specific marker of splenial pathology, often reversible depending on the underlying cause.
Anatomy and appearance
The splenium of the corpus callosum is the posterior part of the corpus callosum, a major white matter structure connecting the two cerebral hemispheres. On MRI, the boomerang sign appears as a boomerang-shaped hyperintense area on DWI. There is a corresponding low signal intensity on the apparent diffusion coefficient (ADC) map, indicating true restricted diffusion. The sign is often localized within the central or posterior splenium.
References
- Pandian, Jeyaraj Durai; Henderson, Robert D. (5 December 2005). ""Boomerang sign" in the splenium of the corpus callosum". Medical Journal of Australia. 183 (11): 628. doi:10.5694/j.1326-5377.2005.tb00059.x. ISSN 0025-729X. PMID 16336154. Retrieved 5 January 2025.
- ^ Starkey, Jay; Kobayashi, Nobuo; Numaguchi, Yuji; Moritani, Toshio (March 2017). "Cytotoxic Lesions of the Corpus Callosum That Show Restricted Diffusion: Mechanisms, Causes, and Manifestations". RadioGraphics. 37 (2): 562–576. doi:10.1148/rg.2017160085. ISSN 0271-5333. PMID 28165876. Retrieved 5 January 2025.
- Mathew, Thomas (2016). ""Boomerang Plus Sign" in Rickettsial Encephalitis". Pediatric Neurology. 56: 88–89. doi:10.1016/j.pediatrneurol.2015.03.011. PMID 26130192. Retrieved 5 January 2025.