Molar tooth sign on MRI
http://purl.obolibrary.org/obo/HP_0002419
An abnormal appearance of the midbrain in axial magnetic resonance imaging in which the elongated superior cerebellar peduncles give the midbrain an appearance reminiscent of a molar or wisdom tooth. [ PMID:14657304 HPO:probinson ]
Term info
- UMLS:C1865060
Molar tooth appearance results from a 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. The absence of crossing fibers also leads to a reduction in the anteroposterior diameter of the midbrain and deepening of the interpeduncular cistern.
An abnormal appearance of the midbrain in axial magnetic resonance imaging in which the elongated superior cerebellar peduncles give the midbrain an appearance reminiscent of a molar or wisdom tooth.
'molar tooth' sign on imaging, 'molar tooth sign' on brain imaging', Molar tooth sign
HP:0002419