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  • Title: An extremely short posterior communicating artery diagnosed by magnetic resonance angiography.
    Author: Uchino A.
    Journal: Surg Radiol Anat; 2022 Nov; 44(11):1467-1469. PubMed ID: 36283982.
    Abstract:
    PURPOSE: To describe a case of an extremely short posterior communicating artery (PCoA) incidentally diagnosed by magnetic resonance (MR) angiography. CASE REPORT: A 48-year-old woman with Parkinson's disease underwent cranial MR imaging and MR angiography. MR imaging revealed no abnormality. After creating partial maximum-intensity-projection (MIP) images, MR angiography showed an extremely short right PCoA, only 4 mm long. The P1 segment of the right posterior cerebral artery (PCA) took an anterior course, and at the junction with the PCoA, the PCA made a hairpin turn and ran posteriorly. The length of the P1 segment was approximately 20 mm, which was relatively long. DISCUSSION: According to an anatomical study using 170 cadaveric brains, the length of the PCoA ranged 5 to 26 mm (mean: 15 mm). Another 2 anatomical studies reported that the shortest PCoA was 7 mm. The present case had an extremely short right PCoA connecting with a hairpin turn at the P1-P2 junction, a unique configuration. CONCLUSION: To identify this variation by MR angiography, creation of partial MIP images was useful.
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