<%server.execute "isdev.asp"%> Classical imaging in callosal agenesis Agarwal DK, Patel SM, Krishnan P - J Pediatr Neurosci
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Year : 2018  |  Volume : 13  |  Issue : 1  |  Page : 118-119

Classical imaging in callosal agenesis

Department of Neurosurgery, National Neurosciences Centre, Kolkata, West Bengal, India

Date of Web Publication16-May-2018

Correspondence Address:
Dr. Prasad Krishnan
Department of Neurosurgery, National Neurosciences Centre, 2nd Floor, Peerless Hospital Campus, 360, Panchasayar, Garia, Kolkata, West Bengal 700094
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Source of Support: None, Conflict of Interest: None

DOI: 10.4103/JPN.JPN_150_17

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Corpus callosal agenesis results in certain characteristic radiological appearances on magnetic resonance imaging. These classical named signs are revisited in this article.

Keywords: Corpus callosum agenesis, moose head appearance, racing car sign, sunray sign

How to cite this article:
Agarwal DK, Patel SM, Krishnan P. Classical imaging in callosal agenesis. J Pediatr Neurosci 2018;13:118-9

How to cite this URL:
Agarwal DK, Patel SM, Krishnan P. Classical imaging in callosal agenesis. J Pediatr Neurosci [serial online] 2018 [cited 2019 Oct 19];13:118-9. Available from: http://www.pediatricneurosciences.com/text.asp?2018/13/1/118/232430

Magnetic resonance imaging performed in an infant with enlarged head size was suggestive of a Dandy–Walker malformation with associated agenesis of the corpus callosum. The following classical radiological signs that have been described in literature[1],[2],[3] were seen.

Racing car sign: Axial imaging [Figure 1] shows the likeness of a Formula One car viewed from above with the lateral ventricles representing the body and the frontal horns and trigones resembling the front and rear tires, respectively.
Figure 1: : Axial imaging (T1 and T2 sequences) of the ventricles resembling a Formula One racing car when viewed from above. The large cyst seen posteriorly is due to the Dandy–Walker malformation

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“Moose head appearance” or “Viking helmet sign”: Coronal views [Figure 2] at the level of the frontal horns have this characteristic appearance due to agenesis of corpus callosum and eversion of bilateral cingulate gyri into respective frontal horns. The lower part of the face of the moose is formed by the third ventricle.
Figure 2: : Coronal imaging (T2 sequence) showing (A) Viking helmet sign and (B) moose head appearance of the ventricles. There is no corpus callosum, and the cingulate gyri (yellow circles) are everted into the ventricles

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Sunray appearance: Sagittal imaging [Figure 3] reveals gyri radiating outward in a radial pattern from the ventricle itself due to absence of the corpus callosum and everted cingulate gyrus.
Figure 3: : Sagittal imaging (T2 sequence) showing radial arrangement of gyri (green darts) that appear to originate from the ventricle itself in absence of the corpus callosum and everted cingulate gyri

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Conflicts of interest

There are no conflicts of interest.

   References Top

Krupa K, Bekiesinska-Figatowska M. Congenital and acquired abnormalities of the corpus callosum: a pictorial essay. Biomed Res Int 2013;13:265619.  Back to cited text no. 1
Fitsiori A, Nguyen D, Karentzos A, Delavelle J, Vargas MI. The corpus callosum: white matter or terra incognita. Br J Radiol 2011;13:5-18.  Back to cited text no. 2
Cherian EV, Shenoy KV, Bukelo MJ, Thomas DA. Racing car brings tear drops in the moose. BMJ Case Rep 2013;13:bcr2012008165.  Back to cited text no. 3


  [Figure 1], [Figure 2], [Figure 3]


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