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Duplicate origin and extremely long P1 segment of the posterior cerebral artery diagnosed by MR angiography

Megumi Matsuda1, Akira Uchino2, Naoko Saito1

  • 1Department of Diagnostic Radiology, Saitama Medical University International Medical Center, 1397-1 Yamane, Hidaka, Saitama, 350-1298, Japan.

Surgical and Radiologic Anatomy : SRA
|November 1, 2016
PubMed

Insights

This study reports a rare arterial variation where an anomalous artery from the distal basilar artery fused with the left posterior cerebral artery. Magnetic resonance angiography is crucial for identifying such unusual cerebral artery variations.

Area of Science:

  • Neuroimaging
  • Vascular Neurology
  • Anatomical Variations

Background:

  • Cerebral arterial anatomy exhibits significant variations.
  • Rare anomalies can impact neurovascular assessments and surgical planning.
  • Accurate identification of vascular variations is critical in clinical practice.

Purpose of the Study:

  • To report the first case of a specific anomalous artery originating from the distal basilar artery and connecting to the posterior cerebral artery.
  • To highlight the importance of detailed magnetic resonance angiography (MRA) review for detecting rare cerebrovascular variations.

Main Methods:

  • Diagnosis was established using magnetic resonance (MR) angiography.
  • Review of MRA images, including partial maximum-intensity-projection (MIP) reconstructions, was performed.

Main Results:

  • An anomalous artery was identified arising from the distal basilar artery.
  • This anomalous artery was observed to fuse with the mid-portion of an unusually long P1 segment of the left posterior cerebral artery.

Conclusions:

  • This case represents a unique finding in cerebral arterial anatomy.
  • Thorough examination of MRA, particularly utilizing partial MIP images, is essential for the detection of rare arterial variations.
Keywords:
Cerebral arterial variationDuplicate originMagnetic resonance angiographyP1 segmentPosterior cerebral artery

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