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KMID : 1237720230560030394
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Anatomy & Cell Biology
2023 Volume.56 No. 3 p.394 ~ p.397
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An unusual arrangement between the highest denticulate ligament and posterior inferior cerebellar artery
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Aditi Patel
Johnathan Baudoin
Arada Chaiyamoon
Juan J. Cardona
Ana Carrera
Francisco Reina
Joe Iwanaga
Aaron S. Dumont
R. Shane Tubbs
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Abstract
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The posterior inferior cerebellar artery (PICA) is often involved in pathologies of the posterior cranial fossa. Therefore, a good understanding of the vessel’s normal and variant courses is important to the neurosurgeon or neurointerventionalist. During the routine microdissection of the craniocervical junction, an unusual arrangement between the highest denticulate ligament and PICA was observed. On the right side, the PICA was given rise to by the V4 segment of the vertebral artery 9 mm after the artery entered the dura mater of the posterior cranial fossa. The artery made an acute turn around the lateral edge of the highest denticulate ligament to then recur 180 degrees and travel medially toward the brainstem. Invasive procedures that target the PICA should be aware of the variant as described herein.
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KEYWORD
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Artery, Posterior cranial fossa, Ligament, Vertebral artery, Aneurysms
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