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Case Studies | Radiological Sciences | India | Volume 5 Issue 2, February 2016
Molar Tooth Sign in Joubert Syndrome: A Case Report
Dr. Brig. K. Sahoo  | Dr. Shweta Bhairagond  | Dr. Pramod Shaha  | Dr. Jainesh Dodia 
Abstract: The molar tooth sign refers to the appearance of the midbrain in axial section in which the elongated superior cerebellar peduncles give the midbrain an appearance reminiscent of a molar or wisdom tooth. Molar tooth sign is caused by lack of normal decussation of superior cerebellar peduncular fiber tracts which in turn leads to enlargement of the peduncles, which also follow a more horizontal course as they extend perpendicularly to the brainstem between the midbrain and the cerebellum. The absence of crossing fibers causes decresed anteroposterior diameter of midbrain and also causes interpeduncular cistern to be deeper than in the normal brain. It is seen in patients with joubert syndrome.
Keywords: Jobert, Magnetic resonance imaging
Edition: Volume 5 Issue 2, February 2016,
Pages: 34 - 36
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