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. 2015 Oct 26;10:138. doi: 10.1186/s13023-015-0358-y

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© Serrano et al. 2015

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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Fig. 1 — Midsagittal vermis relative diameter (MVRD). Legend: Midsagittal vermis relative diameter (MVRD) was calculated using a midsagittal section and measuring total posterior cranial fossa diameter (a linear segment from the posterior commissura to the occipital bone at the foramen magnum) and the largest axial diameter of the cerebellum parallel to the previous linear segment. The fraction (cerebellum diameter/total posterior cranial fossa diameter) is used to express the proportion of both values: $MVRD = 100 \frac{a}{A}$ . The image represents MVRD calculation of patient 5, with a MVRD result of 49 %