Computer-assisted lateralization of unilateral temporal lobe epilepsy using Z-score parametric F-18 FDG PET images

Background

To evaluate the use of unbiased computer-assisted lateralization of temporal lobe epilepsy (TLE) by z-score parametric PET imaging (ZPET).

Methods

38 patients with histologically proven unilateral TLE due to pure hippocampal sclerosis, referred for pre-surgical PET evaluation of intractable seizure over a 5-year period, were included. The F-18 FDG images were oriented along temporal long axis and then transformed into ZPET images on a voxel by voxel basis. Multiple regions of interests (21 in total) were placed on cortical, subcortical and cerebellar structures on twenty-eight out of 38 patients with totally seizure-free (class I) outcome. Paired t-tests with Bonferroni correction were used to determine the location of the most asymmetric regions as variables for subsequent discriminant analysis of the entire group of the patients.

Results

The computer program identified the anterior half of the temporal lobe (p < 0.0005) and thalami (p = 0.021) as the most asymmetric regions in TLE patients with Class I outcome. Discriminant analysis using z-scores from a total of 8 ROIs (in 4 pairs) on these structures correctly lateralized thirty-seven out of 38 (97%) patients (sensitivity = 94%; specificity = 100%). The only false localization came from a patient with equivocal z-scores on the temporal lobes and this patient turned out to have poor outcome.

Conclusion

The computer-assisted lateralization of TLE using ZPET provides an accurate, fast and objective way of seizure evaluation.     

Lipoatrophy in Children With Type 1 Diabetes: An Increasing Incidence?

Objectives:

The objectives were to evaluate the current prevalence of lipoatrophy at insulin injection sites in young patients with type 1 diabetes.

Methods:

Standardized examination of insulin injection sites in all 678 patients with type 1 diabetes treated in 2013 in our outpatient clinic were conducted. In case of lipoatrophy photo documentation and standardized interview with parents and patients were performed.

Methods:

We identified a total of 16 patients (43.8% male) with lipoatrophy (overall prevalence 2.4%). The current mean age (±SD) of the affected patients was 14.4 ± 3.9 years, age and diabetes duration at onset of lipoatrophy were 11.5 ± 3.8 years and 5.4 ± 3.6 years, respectively. All patients were using analogs at the onset of lipoatrophy. In all, 14 of 16 patients (87.5%) were on insulin pump compared with 52% without lipoatrophy (P = .0018). The use of steel needle and Teflon catheter was equal between the pump patients. Concomitant autoimmune diseases were present in 37.5% of the patients (thyroiditis: n = 3, thyroiditis and celiac disease: n = 2, celiac disease: n = 1) compared with 15.0% in those without lipoatrophy (P = .0128).

Conclusions:

Lipoatrophy was present in young patients treated with modern insulins and pumps; however, the prevalence was relatively low as expected with the use of modern insulins. Our data may support the hypothesis that a constant mechanical element such as a subcutaneous catheter may trigger the development of lipoatrophy, particularly in those patients with more than 1 autoimmune disease.     

Failure on voxilaprevir,velpatasvir, sofosbuvir and efficacy of rescue therapy

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Dose modulated retrospective ECG-gated versus non-gated 64-row CT angiography of the aorta at the same radiation dose: comparison of motion artifacts, diagnostic confidence and signal-to-noise-ratios

Purpose

To compare ECG-gated and non-gated CT angiography of the aorta at the same radiation dose, with regard to motion artifacts (MA), diagnostic confidence (DC) and signal-to-noise-ratios (SNRs).

Materials and methods

Sixty consecutive patients prospectively randomized into two groups underwent 64-row CT angiography, with or without dose-modulated ECG-gating, of the entire aorta, due to several pathologies of the ascending aorta. MA and DC were both assessed using a four-point scale. SNRs were calculated by dividing the mean enhancement by the standard deviation. The dose-length-product (DLP) of each examination was recorded and the effective dose was estimated.

Results

Dose-modulated ECG-gating showed statistically significant advantages over non-gated CT angiography, with regard to MA (p < 0.001) and DC (p < 0.001), at the aortic valve, at the origin of the coronary arteries, and at the dissection membrane, with a significant correlation (p < 0.001) between MA and DC. At the aortic wall, however, ECG-gated CT angiography showed statistically significant fewer MA (p < 0.001), but not a statistically significant higher DC (p = 0.137) compared to non-gated CT angiography. At the supra-aortic vessels and the descending aorta, the ECG-triggering showed no statistically significant differences with regard to MA (p = 0.861 and 0.526, respectively) and DC (p = 1.88 and 0.728, respectively). The effective dose of ECG-gated CT angiography (23.24 mSv; range, 18.43–25.94 mSv) did not differ significantly (p = 0.051) from that of non-gated CT angiography (24.28 mSv; range, 19.37–29.27 mSv).

Conclusion

ECG-gated CT angiography of the entire aorta reduces MA and results in a higher DC with the same SNR, compared to non-gated CT angiography at the same radiation dose.     

Seroprevalence of HIV, HBV and HCV in orthopaedic patients at a tertiary hospital in Greece

Infections from hepatitis viruses and human immunodeficiency virus (HIV) as well represent a continuous risk factor to health care providers, in particular those working in surgical departments. The aim of this study was to define the prevalence of HIV, hepatitis B (HBV) and hepatitis C (HCV) viruses in patients admitted in an urban, tertiary orthopaedic department in Greece. We retrospectively studied 1,694 consecutive patients who underwent several orthopaedic procedures. All patients were tested for HIV, HBV and HCV infections. Sixty-six (3.9%) of the patients were seropositive for at least one of the studied viruses. Thirty (1.7%) were positive for HBV, 34 (2%) for HCV and 2 (0.1%) for HIV. The majority of the seropositive patients were women (53%), urban areas citizens (89.4%), and of Greek nationality (83.3%). Non-Greek nationality was the only significantly predictive factor for seropositivity (χ² = 590.2, P < 0.001). The majority of patients were not aware of their infection. A significant percentage of patients cared for at a Greek orthopaedic department were seropositive for blood-borne viruses. Non-Greek nationality is a risk factor. We believe that these data will increase awareness and will promote safer practices among health care providers in orthopaedic units.     

Parental influence on obesity in Northern Plains American Indian youth

Little is known regarding American Indian (AI) parental influence on children's diet and physical activity (PA), or if this influence is associated with childhood weight. We compared AI parents' diet, PA, and support for these behaviors with the child's body mass index. Scores for parental support of positive PA and diet were higher among parents of overweight/obese children. Parent PA and nutrition behaviors were in a similar, but not significant, direction with respect to child body mass index. Findings suggest that future research is needed to determine what parental, societal, or community variables influence AI children to engage in healthy eating and PA, especially if they are overweight or obese, and the age at which these variables would have the most impact on these behaviors.     

Left ventricular diastolic function in physiologic and pathologic hypertrophy

BACKGROUND: Patients with hypertensive heart disease and left ventricular hypertrophy demonstrate an impaired left ventricular diastolic filling pattern. The aim of this study was to find out whether physiologic left ventricular hypertrophy induced by endurance training causes disturbances in left ventricular systolic and diastolic filling. METHODS: We examined 49 athletes with left ventricular (LV) hypertrophy due to endurance training, 49 patients with LV hypertrophy due to arterial hypertension, and 26 untrained healthy control subjects by conventional echocardiography. Parameters of LV diastolic filling using pulse wave and color flow Doppler were also assessed. RESULTS: All three study groups showed normal fractional shortening and mid-wall fractional shortening. Conventional echocardiography revealed a higher LV muscle mass index in the two study groups compared with the controls (athletes, 99 +/- 10 g; hypertensive patients, 95 +/- 11 g: controls: 52 +/- 7 g; P < .01 for athletes and hypertensive patients). In patients with arterial hypertension, a diastolic dysfunction consisting of a delayed relaxation pattern with a decrease in maximal early velocity of diastolic filling (0.44 +/- 0.1 m/sec) and a compensatory increase of the maximal late velocity of diastolic filling (0.53 +/- 0.1 m/sec) was demonstrated. In athletes with physiologic LV hypertrophy, a normal LV diastolic filling pattern was documented. CONCLUSIONS: Doppler echocardiographic parameters of LV diastolic function can be of diagnostic importance for discrimination between pathologic and physiologic LV hypertrophy.     

Effect of experimentally induced diabetes on swine vascular prostacyclin (PGI2) synthesis

Repeated administration of streptozotocin to G?ttingen miniature swine led to the development of a mild form of diabetes. The amount of PGI2 generated by the vessels (abdominal aorta, thoracic aorta, pulmonary artery), as estimated by reference to inhibition of ADP-induced platelet aggregation, was lower in the treated animals than in the controls. The decrease in the synthesis of PGI2 may contribute to the prethrombotic state in diabetes mellitus.