Localized hypertrophic neuropathy of the sciatic nerve in children: MRI findings.

Adrien Roux 1 Catherine Tréguier 1 Bertrand Bruneau 1 Franck Marin 1 Laurent Riffaud 2 Philippe Violas 3 Anne Michel 4 Yves Gandon 1 Jean-Yves Gauvrit 1, 5
1 Service de radiologie et imagerie médicale [Rennes]
2 Service de neurochirurgie [Rennes]
3 Service de chirurgie pédiatrique [Rennes]
4 Service d'explorations fonctionnelles neurologiques [Rennes]
5 VisAGeS - Vision, Action et Gestion d'informations en Santé
INSERM - Institut National de la Santé et de la Recherche Médicale : U746, Inria Rennes – Bretagne Atlantique , IRISA-D5 - SIGNAUX ET IMAGES NUMÉRIQUES, ROBOTIQUE
Abstract : BACKGROUND: Localized hypertrophic neuropathy (LHN) of the sciatic nerve in children is a rare condition characterized by a painless neurological deficit in the sciatic nerve territory. OBJECTIVE: To demonstrate the role of MRI using a specific protocol and describe the primary findings in LHN. MATERIALS AND METHODS: Imaging in four children (age 2 years to 12 years) is presented. All children presented with lower limb asymmetry. Three had a steppage gait. LHN was confirmed by electrophysiological studies and by MRI of the whole sciatic nerve with a dedicated protocol covering the lumbar spine and the lower limb. RESULTS: There were four direct MRI findings: (1) linear and focal hypertrophy with progressive enlargement of a peripheral nerve or plexus diameter, (2) abnormal hyperintensity of the nerve on T2-weighted images, (3) preserved fascicular configuration, and (4) variable enhancement after intravenous gadolinium administration. In addition there were atrophy and fatty infiltration of innervated muscles. MRI was helpful for determining the extent of lesions and in excluding peripheral nerve compression or tumour. CONCLUSION: MRI of the whole sciatic nerve is the method of choice for diagnosing LHN of the sciatic nerve.
Keywords : Localized hypertrophic neuropathy intraneural perineuromia sciatic nerve child
Type de document :
Article dans une revue
Pediatric Radiology, Springer Verlag, 2012, 42 (8), pp.952-8. 〈10.1007/s00247-012-2418-y〉
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http://www.hal.inserm.fr/inserm-00845312
Contributeur : Jean-Yves Gauvrit <>
Soumis le : mardi 16 juillet 2013 - 18:00:34
Dernière modification le : mercredi 16 mai 2018 - 11:24:07

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INRIA | LTSI | IRISA-D5 | IRISA | UR1-UFR-ISTIC | UNIV-RENNES

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Adrien Roux, Catherine Tréguier, Bertrand Bruneau, Franck Marin, Laurent Riffaud, et al.. Localized hypertrophic neuropathy of the sciatic nerve in children: MRI findings.. Pediatric Radiology, Springer Verlag, 2012, 42 (8), pp.952-8. 〈10.1007/s00247-012-2418-y〉. 〈inserm-00845312〉

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