Thalamic Atrophy Predicts 5-Year Disability Progression in Multiple Sclerosis.

Purpose: Thalamus is among the first brain regions to become atrophic in multiple sclerosis (MS). We studied whether thalamic atrophy predicts disability progression at 5 years in a cohort of Finnish MS patients. Methods: Global and regional brain volumes were measured from 24 newly diagnosed relapsing MS (RMS) patients 6 months after initiation of therapy and from 36 secondary progressive MS (SPMS) patients. The patients were divided into groups based on baseline whole brain parenchymal (BP) and thalamic atrophy. Standard scores (z scores) were computed by comparing individual brain volumes with healthy controls. A z score cutoff of -1.96 was applied to separate atrophic from normal brain volumes. The Expanded Disability Status Scale (EDSS), brain magnetic resonance imaging (MRI) findings, and relapses were assessed at baseline and at 2 years and EDSS progression at 5 years. Results: Baseline thalamus volume predicted disability in 5 years in a logistic regression model (p = 0.031). At 5 years, EDSS was same or better in 12 of 18 patients with no brain atrophy at baseline but only in 5 of 18 patients with isolated thalamic atrophy [odds ratio (OR) (95% CI) = 5.2 (1.25, 21.57)]. The patients with isolated thalamic atrophy had more escalations of disease-modifying therapies during follow-up. Conclusion: Patients with thalamic atrophy at baseline were at a higher risk for 5-year EDSS increase than patients with no identified brain atrophy. Brain volume measurement at a single time point could help predict disability progression in MS and complement clinical and routine MRI evaluation in therapeutic decision-making.

Thalamic Atrophy Without Whole Brain Atrophy Is Associated With Absence of 2-Year NEDA in Multiple Sclerosis.

Purpose: To study which brain volume measures best differentiate early relapsing MS (RMS) and secondary progressive MS (SPMS) patients and correlate with disability and cognition. To test whether isolated thalamic atrophy at study baseline correlates with NEDA (no evidence of disease activity) at 2 years. Methods: Total and regional brain volumes were measured from 24 newly diagnosed RMS patients 6 months after initiation of therapy and 2 years thereafter, and in 36 SPMS patients. Volumes were measured by SIENAX and cNeuro. The patients were divided into subgroups based on whole brain parenchyma (BP) and thalamic atrophy at baseline. Standard scores (z-scores) were computed by comparing individual brain volumes against healthy controls. A z-score cut-off of -1.96 was applied to separate atrophic from normal brain volumes. The Expanded Disability Status Scale (EDSS) and Symbol Digit Modalities Test (SDMT) were assessed at baseline and at 2 years. Differences in achieving NEDA-3, NEDA-4, EDSS progression, and SDMT change were analyzed between patients with no thalamic or BP atrophy and in patients with isolated thalamic atrophy at baseline. Results: At baseline, 7 SPMS and 12 RMS patients had no brain atrophy, 8 SPMS and 10 RMS patients had isolated thalamic atrophy and 2 RMS and 20 SPMS patients had both BP and thalamic atrophy. NEDA-3 was reached in 11/19 patients with no brain atrophy but only in 2/16 patients with isolated thalamic atrophy (p = 0.012). NEDA-4 was reached in 7/19 patients with no brain atrophy and in 1/16 of the patients with isolated thalamic atrophy (p = 0.047). At 2 years, EDSS was same or better in 16/19 patients with no brain atrophy but only in 5/17 patients with isolated thalamic atrophy (p = 0.002). There was no significant difference in the EDSS, relapses or SDMT between patients with isolated thalamic atrophy and no atrophy at baseline. Conclusion: Patients with isolated thalamic atrophy were at a higher risk for not reaching 2-year NEDA-3 and for EDSS increase than patients with no identified brain atrophy. The groups were clinically indistinguishable. A single measurement of thalamic and whole brain atrophy could help identify patients needing most effective therapies from early on.

Frontobasilar fractures: proposal for image reviewing algorithm.

OBJECTIVE: The aim of this study was to develop and test the utility of a novel systematic protocol to analyze CT images of patients with trauma in the anterior cranial base and upper midface. MATERIAL AND METHODS: The radiological data and primary reports of 27 consecutive patients with a frontal skull base fracture treated in two tertiary care hospitals from 2007 to 2011 were scrutinized. A novel algorithm for systematic image reviewing was used to assess the CT images and the findings were compared with the primary radiological reports. RESULTS: The systematic review detected a substantial number of fractures and defects in anatomical structures that had not been systematically reported in the primary, on-call reports. Anterior skull base fracture was not initially reported in 32% of the patients; however, the algorithm detected this in 93% of them. The corresponding rates for fracture through cribriform plate were 28% and 72% and for fracture through the sella or hypophyseal area 22% and 78%. There were two fractures of the clivus and these were initially missed. CONCLUSIONS: Despite the failure to identify these fractures radiologically in the primary setting, all patients were still considered to have received appropriate treatment, but, the use of an image-reviewing algorithm will enhance the specificity of CT in the diagnosis of frontobasilar fractures.

Post-traumatic morbidity is frequent in children with frontobasilar fractures.

OBJECTIVE: Frontobasilar fractures are potentially life-threatening injuries also in pediatric populations, often due to associated intracranial trauma. This retrospective study was performed at a tertiary care university hospital to evaluate the management and outcome of pediatric frontobasilar fractures. The secondary aim was to re-evaluate the computerized tomography images to reveal all the skull base fracture sites predicting morbidity. METHODS: A retrospective analysis of all the 20 consecutive pediatric patients diagnosed with and treated for a frontobasilar fracture at the Turku University Hospital, Turku, Finland during 1995-2010 was performed. The referral area of this tertiary care university hospital covers 750,000 inhabitants of whom approximately 20% are 18 years or younger. RESULTS: The mean annual incidence of frontobasilar fractures was 1.1 per 100,000 children aged 18 years and under. A road traffic accident was the most common etiological factor. Other factors included being hit by a heavy object, falling from a height, and falling to the ground. The mean Glasgow Coma Scale score was 10 and loss of consciousness was initially detected in 15 (75%) patients in the emergency unit. Twelve (60%) patients had an intracranial injury, 17 (85%) had facial bone fractures, and 15 (75%) had a fracture of the anterior cranial base. The middle cranial fossa and sella were affected in five (25%) of the patients. There seem to be no long-term neuroendocrine sequelae following brain injury, not even when the sella or the hypophyseal area was affected. Twelve (60%) patients were treated operatively. One patient died after one week of intensive care treatment. Only four (20%) patients had no post-traumatic implications, eight (40%) suffered from various long-term sequelae, and five (25%) had permanent neurological or neuropsychological sequelae. CONCLUSIONS: Frontobasilar fractures in childhood are rare and often associated with intracranial trauma and long-term morbidity. However, according to this study, 75% of the patients showed no permanent neurological or neuropsychological sequelae.