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Biomedical subjects

B Barroso

Publications and source records attributed to B Barroso.

9 recordsLinked to original sources
PubMed2006

MR imaging of relapsing multiple sclerosis patients using ultra-small-particle iron oxide and compared with gadolinium.

BACKGROUND AND PURPOSE: Inflammatory multiple sclerosis (MS) lesions are characterized by microglia activation and infiltration of T cells, B cells, and macrophages across the blood-brain barrier (BBB). In the experimental autoimmune encephalomyelitis (EAE) rat model of MS, previous MR imaging investigations with a new contrast agent ultra-small-particle iron oxide (USPIO) that accumulates in phagocytic cells revealed in vivo the presence of macrophage brain infiltration. The goal of this study was to characterize MS lesions with the use of this contrast agent. METHODS: A prospective MR imaging study of 10 patients with MS in acute relapses was achieved by using USPIO and gadolinium. RESULTS: Twenty-four hours after USPIO injection, 33 acute MS lesions in 9 patients showed USPIO uptake. Lesions were seen as high signal intensities on T1-weighted images and low signal intensities on T2-weighted images. Gadolinium enhancement was seen in 31 of these lesions in 7 patients. These 7 patients presented 24 gadolinium-enhanced lesions that did not enhance with USPIO. Two patients showed USPIO-enhanced lesions but no gadolinium-enhanced lesions. CONCLUSION: Taken together with earlier findings obtained in experimental models or in human stroke, the visualization of macrophage activity in vivo with USPIO characterize a distinct cellular and inflammatory event of the dynamic process of MS lesion formation. The macrophage activity information obtained with USPIO is distinct and complementary to the increased BBB permeability seen with gadolinium.

Adult↗
PubMed2005

[Pseudomigraine with transient neurological deficits and cerebrospinal fluid lymphocytosis].

INTRODUCTION: Pseudomigraine with temporary neurological symptoms and lymphocytic pleocytosis is a rare syndrome resolving within less than 3 months. CASE REPORT: A young 17-year-old woman without previous medical history was admitted to the hospital because of right motor weakness and language disturbances. The symptoms resolved in a few hours and were followed by severe left headaches with important vegetative signs. Several similar episodes were noted in the previous 10 days. Cranial MRI was normal. EEG showed important slowing of the cerebral electrogenesis. More than 250 lymphocytic cells were found at CSF analysis. Outcome was spontaneously favorable, without similar symptoms after 6-month follow-up. CONCLUSION: Pseudomigraine with lymphocytic pleocytosis seems to be a particular syndrome of unknown origin. This is an elimination diagnosis, generally with a benign course.

Acyclovir↗
PubMed2005

Cognitive impairment as marker of diffuse brain abnormalities in early relapsing remitting multiple sclerosis.

OBJECTIVES: To establish the frequency of cognitive impairment in a population based sample of patients with recently diagnosed relapsing-remitting multiple sclerosis (RRMS), and to determine the relation between cognitive abnormalities and the extent of macroscopic and microscopic tissue damage revealed by magnetic resonance imaging (MRI) and magnetisation transfer (MT) imaging. METHODS: 58 patients with RRMS consecutively diagnosed in the previous six months in Aquitaine and 70 healthy controls underwent a battery of neuropsychological tests. Lesion load and atrophy indices (brain parenchymal fraction and ventricular fraction) were measured on brain MRI. MT ratio (MTR) histograms were obtained from lesions, normal appearing white matter (NAWM), and normal appearing grey matter (NAGM). Gadolinium enhanced lesions were counted. RESULTS: 44 RRMS patients could be individually matched with healthy controls for age, sex, and education. Patients performed worse in tests of verbal and spatial memory, attention, information processing speed, inhibition, and conceptualisation. Measures of attention and information processing speed were correlated with lesion load, mean NAWM MTR, and the peak location of the NAGM MTR histogram in the patients. Multivariate regression analysis showed that lesion load and mean NAWM MTR were among the MR indices that were most significantly associated with impairment of attention and information processing speed in these early RRMS cases. CONCLUSIONS: Cognitive impairment appears to be common in the early stages of RRMS, mainly affecting attention, information processing speed, memory, inhibition, and conceptualisation. The severity of these deficits reflects the extent of the lesions and the severity of tissue disorganisation outside lesions.

Adult↗
PubMed2004

[Reversible postpartum cerebral angiopathy associated with bromocriptine therapy].

BACKGROUND: Postpartum is known to be an important risk factor for stroke. Bromocriptine may induce cerebral angiopathy. CASE DESCRIPTION: We report the case of a 26-year-old postpartum woman who presented with headaches, seizures, hypertension and acute renal failure eight days after the beginning of a treatment with bromocriptine prescribed for lactation suppression. Brain MRI and MR angiogram excluded cortical vein thrombosis and revealed multiple abnormal areas of increased signal in the cortex with segmental arterial narrowings of intracranial vasculitis. The patient completely recovered within one week after drug withdrawal. Biological and radiological abnormalities were also reversible. Following the chronology bromocriptine was most likely responsible for this adverse cerebral and systemic event. CONCLUSION: Clinicians should be aware of bromocripine-related postpartum cerebral angiopathy, a rarely described but serious complication of bromocriptine used to prevent postpartum breast engorgement.

Adult↗
PubMed2001

[Illness management modalities].

Multiple sclerosis (MS) is the most common neurological disease disabling young adults. Patients with MS experience symptoms in an unpredictable pattern over years or decades. The doctor/patient relationship in MS, beginning with the announcement of the diagnosis has to grow stronger with a clear structured information following from the many available studies of the medical literature. This is all the more welcome since the introduction of a new generation of disease-modifying agents which has a radical effect on the management of the condition. This management of MS must also concentrate on symptom relief, palliative care and complementary therapies including rehabilitation when a disability occurs. Nowadays, a quality health service for people with MS need to be intimately involved in the long-term care of a disease which has frequently a social and occupational impact. Physicians of several disciplines, primary medical care, social service and nurses should work as an integrated medical network model focusing on the patient and his family.

Disability Evaluation↗
PubMed2001

[Signet-ring cell carcinomatous meningitis complicating esophageal neoplasia].

Leptomeningeal invasion is an uncommon complication of systemic solid cancers. We describe a patient with such an infiltration caused by a signet-ring cells esophageal adenocarcinoma. The diagnosis required repeated cytologic examinations of cerebrospinal fluid while clinical signs and biological data were not conclusive, mimicking acute infectious meningoencephalitis. Magnetic resonance imaging was highly contributive in establishing the diagnosis. Nevertheless this is a very rare complication of esophageal cancers as this metastatic location occurred in advanced stages of the disease and as we know the poor prognosis of those cancers.

Carcinoma, Signet Ring Cell↗