The Cervical Spinal Canal Tapers Differently in Patients with Chiari I with and without Syringomyelia

A. Thompson; N. Madan; J.R. Hesselink; G. Weinstein; A. Munoz del Rio; V. Haughton

doi:10.3174/ajnr.A4597

Research ArticleSpine Imaging and Spine Image-Guided Interventions

The Cervical Spinal Canal Tapers Differently in Patients with Chiari I with and without Syringomyelia

A. Thompson, N. Madan, J.R. Hesselink, G. Weinstein, A. Munoz del Rio and V. Haughton

American Journal of Neuroradiology April 2016, 37 (4) 755-758; DOI: https://doi.org/10.3174/ajnr.A4597

A. Thompson

aFrom the Departments of Radiology (A.T., A.M.d.R., V.H.)

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N. Madan

cDepartment of Radiology (N.M., G.W.), Tufts University School of Medicine, Boston, Massachusetts

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J.R. Hesselink

dDepartment of Radiology (J.R.H.), University of California San Diego, San Diego, California.

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G. Weinstein

cDepartment of Radiology (N.M., G.W.), Tufts University School of Medicine, Boston, Massachusetts

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A. Munoz del Rio

aFrom the Departments of Radiology (A.T., A.M.d.R., V.H.)

bMedical Physics (A.M.d.R.), University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin

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V. Haughton

aFrom the Departments of Radiology (A.T., A.M.d.R., V.H.)

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Fig 1.
C1–C7, C1–C4, and C4–C7 taper ratios and 95% confidence intervals for set 1 and 2 readings in patients with Chiari I without and with syrinx.
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Fig 2.
Box-and-whisker plot of the C4–C7 taper ratios in patients with Chiari I without and with a syrinx. For sets 1 and 2, taper ratios differed significantly between groups (P = .026, .039).

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Taper ratios for C1–C7, C1–C4, and C4–C7 and tonsillar ectopia in patients with Chiari I with and without a syrinx

	Reader Set 1		Reader Set 2
	Without Syrinx	With Syrinx	Without Syrinx	With Syrinx
C1–C7 Taper ratio (cm/level)	−0.057	−0.036^{^a}	−0.052	−0.032^{^a}
C1–C4 Taper ratio (cm/level)	−0.147	−0.122	−0.129	−0.115
C4–C7 Taper ratio (cm/level)	+0.011	+0.031^{^a}	+0.009	+0.028^{^a}
Tonsillar ectopia (mm)	9.8	10.8^{^a}	12.0	12.7^{^a}

↵a Significant differences between cases with and without syrinx (P < .05).

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A. Thompson, N. Madan, J.R. Hesselink, G. Weinstein, A. Munoz del Rio, V. Haughton

The Cervical Spinal Canal Tapers Differently in Patients with Chiari I with and without Syringomyelia

American Journal of Neuroradiology Apr 2016, 37 (4) 755-758; DOI: 10.3174/ajnr.A4597

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The Cervical Spinal Canal Tapers Differently in Patients with Chiari I with and without Syringomyelia

A. Thompson, N. Madan, J.R. Hesselink, G. Weinstein, A. Munoz del Rio, V. Haughton

American Journal of Neuroradiology Apr 2016, 37 (4) 755-758; DOI: 10.3174/ajnr.A4597

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