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Cerebral atrophy is linked to clinical severity and worsens with aging in patients with Pelizaeus–Merzbacher disease and Spastic Paraplegia type 2

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HAL Id: hal-01870933

https://hal.archives-ouvertes.fr/hal-01870933

Submitted on 8 Nov 2018

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Cerebral atrophy is linked to clinical severity and

worsens with aging in patients with

Pelizaeus–Merzbacher disease and Spastic Paraplegia

type 2

Catherine Sarret, Jean-Jacques Lemaire, Anna Sontheimer, Jerome Coste,

Bruno Pereira, Fabien Feschet, Basile Roche, Jean-Pierre Renou, Odile

Boespflug-Tanguy

To cite this version:

Catherine Sarret, Jean-Jacques Lemaire, Anna Sontheimer, Jerome Coste, Bruno Pereira, et al.. Cere-bral atrophy is linked to clinical severity and worsens with aging in patients with Pelizaeus–Merzbacher disease and Spastic Paraplegia type 2. 42nd Congress of the European Society of Neurological Pedi-atry, in conjunction with the 20th Mediterranean Meeting of Child Neurology, European Society of Neurological Pediatry, Sep 2014, Montpellier, France. pp.90, �10.1016/j.ijdevneu.2015.04.245�. �hal-01870933�

(2)

Sarret C. et al. Société Européenne de Neurologie Pédiatrique, Montpellier 2014

Cerebral atrophy is linked to clinical severity and worsens with

aging in patients with Pelizaeus-Merzbacher disease and Spastic

Paraplegia type 2

Sarret C.

1

, Lemaire J.-J.

1

, Sontheimer A.

1

, Coste J.

1

, Pereira B.

1

, Feschet F.

1

,

Roche B.

1

, Renou J.-P.

2

, Boespflug-Tanguy O.

3

1. IGCNC – Université d’Auvergne, France 2. INRA Saint Genès-Champanelle, France 3. Hôpital Robert Debré, Paris, France

Objective: This study aims to determine the natural history of genetic hypomyelinating

disorders Pelizaeus–Merzbacher disease (PMD) and Spastic Paraplegia type 2 (SPG2) on magnetic resonance imaging (MRI) and to correlate MRI results with clinical severity.

Methods: A prospective study in 35 patients with variable forms of PMD or SPG2 was

performed on a total of 66 cerebral MRI. A myelination score and a global atrophy score were determined for each MRI. We also performed image segmentation to calculate corpus callosum area, cerebellum, white matter and gray matter volumes.

Results: Multivariate analysis with adjustment to the age revealed a significant difference for

global atrophy score and corpus callosum area in different subgroups of severity at the first MRI acquisition. Evolution of MRI over time showed an increasing score of myelination until the age of 12 years, followed by stabilization. On the contrary, global atrophy, atrophy of corpus callosum and cerebellum worsened in the majority of patients with aging. No change in gray matter and white matter proportions was noticed over time.

Discussion: This study points out a correlation between cerebral atrophy and clinical severity

in patients with PMD and SPG2 whereas degree of myelination was not clearly discriminating. It also highlighted, for the first time in a large cohort of patients, a clear inter- and intra-individual cerebral atrophy over time involving white and gray matter.

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