J Neurol Neurosurg Psychiatry 2008; 79:333C4. Footnotes Competing interests: None. REFERENCES 1. remains obscurenecrotic-haemorrhagic lesions coexisting with inflammatory lesions. An important breakthrough came from the recent discovery of highly specific antibodies linked to a water aquaporin channel,3 which is usually most abundant in the astrocytes of the bloodCbrain barrier. We statement on a peculiar case of relapsing NMO with severe recurrent dysautonomia and hypersomnia, in which we had the opportunity to observe a dramatic decrease Mometasone furoate in hypocretin/orexin cerebrospinal fluid (CSF) level. CASE PRESENTATION A Caucasian woman given birth to in 1953 was first seen in 1999 for an episode of sensorimotor deficit in the right upper and lower limbs; MRI disclosed Rabbit Polyclonal to MINPP1 a cervical lesion from C3 to Mometasone furoate C7 and inflammatory myelopathy was the provisional diagnosis. Recovery was total after five methylprednisolone infusions. In April 2001, she presented with complete paralysis of the left lower Mometasone furoate limb; MRI of the spine disclosed an enlarged, non-enhancing lesion from C4 to T9. No CSF oligoclonal bands were found. Antinuclear and anti-SSa/SSb antibodies were unfavorable. High-dose intravenous methylprednisolone was given without obvious improvement. Six weeks later, the patient complained of subacute bilateral vision loss. Campimetry revealed bitemporal haemianopia, and brain T2 MRI showed hyperintense lesions localised to the optic chiasma (fig 1A) and to the initial portion of the optic nerves. Diagnosis of NMO was then considered as highly probable, and the patient was treated on a monthly basis by methylprednisolone infusions. Several other attacks led to trials of azathioprine, intravenous immunoglobulins and mitoxantrone, without any convincing results. The patient became bedridden, with total paraplegia, severe right arm weakness and central hypoventilation attributed to the extent of cervical cord lesion. Open in a separate window Physique 1 (A) Coronal MRI, T2 linear hyperintensity in the optic chiasma (arrow) and close to the right temporal horn (arrowhead).(B) Axial MRI, FLAIR hyperintensity in the hypothalamus (arrow) and more diffusely in periventricular areas. Since mid-2002, five stereotyped episodes of acute dysautonomia have occurred, manifested by profound and stable hypothermia at about Mometasone furoate 32C, systolic hypotension, bradycardia, diffuse subcutaneous oedema, hyponatraemia and a permanent hypersomnia status related to a coma-like state. MRI revealed diffuse T2 and FLAIR periventricular hyperintensities, compatible with inflammatory-necrotic lesions (fig 1A, B); the brainstem was normal. Renal function was not impaired. Administration of dopamine and dobutamine consistently resulted in polyuria and normalisation of vital and biologic indicators within 24 hours. INVESTIGATIONS In May 2001, the hypocretin CSF level was first decided, this patient providing as one of the controls in a study of hypersomniac subjects.4 When the indicators of dysautonomia appeared, another CSF sample was obtained (in November 2002), and a dramatic fall in hypocretin level was found, from 874 pg/ml to 158 pg/ml (mean value in 88 diverse neurological conditions 572.4 pg/ml (SD 268.5); range 260C1333; CSF taken between 9 and 11 am).4 It should be stressed that no cataplexy, sleep paralysis or hypnagogic hallucinations have occurred during the acute episodes. In-between sleepCwake patterns have remained normal. Finally, NMO antibodies have been tested with a positive result in our laboratory and confirmed in another laboratory (INSERM U842, Lyons, France). In April 2006, the patient was admitted to another hospital in an rigorous care unit, for respiratory distress with severe bradycardia, which was attributed to dysautonomia; a cardiac pacemaker was implanted. She received three rituximab infusions with no significant improvement of motor functioning. Since July 2007, she has been under continuous ventilation by tracheostomy. Conversation Our patients history conforms to all of the most recent diagnostic criteria,1 including brain MRI findings that are atypical for multiple sclerosis.2 It is heuristic in two ways: description of severe attacks of autonomic dysfunction in NMO, and demonstration Mometasone furoate of its hypothalamic origin by means of a specific assay. Hypocretin/orexin cells have been recently recognized in the posterolateral hypothalamus; 5 their role in sleep regulation has drawn a lot of attention. It is now obvious that these neurons are almost absent in narcolepsy/cataplexy patients, through.