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. Xi and . Summary,

. Neurosarcoidosis, NS) is a rare and polymorphic entity, often inaugural and isolated. To date, diagnostic assessment is still a matter of debate

, A retrospective study of all patients diagnosed with NS was conducted in Rouen University Hospital between 1992 and 2018. We included patients diagnosed with definite, probable and possible NS, as described by the Neurosarcoidosis Consortium Group 2018 and collected clinical, biological and imaging data

, Possible NS were up-represented about 6% compared to previous Marangoni et al criteria. The median time to diagnostic was 3.0 months. In cases of already known sarcoidosis, neurological symptoms mainly occurred within 6 months after the onset of sarcoidosis (54%), A total of 35 patients were included, 24 (69%) of whom with inaugural NS. Sex ratio male/female was 0.84

, No difference was found in terms of demographic features, biological tests and imaging in subgroup between: inaugural NS or not, age, sex. Women younger than 40 years seemed to have more cranial nerve palsy and a better prognosis

C. Richard, R. Lefaucheur, L. Grangeon, D. Maltête, B. Bourre et al., MRI, EMG) abnormal was 94.3% showing the interest of these three investigations in suspected cases of NS XII. COMMUNICATIONS AFFICHEES Neurosarcoidosis : report of 30 cases. What about diagnosis dilemma ?, Here we highlight application of 2018 diagnosis consensus criteria of NS. Probability having at least one of the following (CSF

C. Richard, L. Grangeon, R. Lefaucheur, D. Maltête, and B. Bourre, ECTRIMS 2019. 10/10/2019. RESUME INTRODUCTION : La sarcoïdose est une granulomatose systémique caractérisée par de granulomes épithélioïdes et gigantocellulaires sans nécrose caséeuse. La neurosarcoïdose est une présentation rare (5%), polymorphe, souvent révélatrice (75%), parfois isolée (15%), New consensus diagnosis criteria of Neurosarcoidosis: Application in a French, 2018.

. Materiel and . Methode, Il s'agit de l'étude rétrospective d'une cohorte de patients présentant une atteinte neurologique de sarcoïdose monocentrique au CHU de Rouen de 1992 à 2018. Tout patient remplissant les critères diagnostic selon Stern

, Les atteintes du système nerveux central étaient prédominantes : céphalées (49%), atteinte des NC (57%), parenchymateuse (29%) (dont les crises convulsives), puis médullaire (17%) ou périphérique (11%). La probabilité d'avoir au moins une anomalie parmi LCR, IRM cérébrale et/ou médullaire et ENMG était de 94,3%. Le LCR retrouvait typiquement une méningite lymphocytaire (86%) et une hyperproteinorrachie chez (71%). L'IRM révélait des lésions inflammatoires focales (73%) et diffuses (87%). Les examens biologiques montraient : une lymphopénie (71%), RESULTATS : 35 patients ont été inclus dont 24 (69%) NS inaugurale. Le sexe ratio H/F était 0,84. L'âge médian de début était 48,0 ans. La neurosarcoïdose était définie 4 (11%), probable 17 (49%) ou possible 14 (40%)

, CONCLUSION : La neurosarcoïdose est caractérisée par son polymorphisme clinique et paraclinique. En cas de suspicion de maladie inflammatoire du système nerveux central, certains signes évocateurs sont : notamment la présence de céphalées, d'une atteinte des NC, de manifestations extra neurologiques. La prévalence des anomalies aux examens de première intention LCR, IRM, ENMG et l'importante dissociation avec la clinique incitent à une

, MOTS CLES : Neurosarcoïdose, définie, probable, possible, phénotype, rentabilité