K Mann

University Hospital Essen, Essen, North Rhine-Westphalia, Germany

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Publications (656)1768.79 Total impact

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    ABSTRACT: Malignant phaeochromocytomas are rare and highly aggressive tumours. This retrospective study evaluated the outcome of combined chemotherapy with Cyclophosphamide, Vincristine, and Dacarbazine (also known as CVD regimen).
    Clinical Endocrinology 08/2014; · 3.40 Impact Factor
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    ABSTRACT: Preceding studies have indicated that aberrant expression levels rather than genetic changes of GADD45γ, MEG3, and p8 gene might play a role in the pathogenesis of pituitary adenomas. We analysed their expression in various normal human tissues and in different pituitary tumour types, and investigated GADD45γ mutations in a subset of adenomas. Absolute quantification by real-time RT-PCR was performed in 24 normal tissues as well as in 34 nonfunctioning, 24 somatotroph, 12 corticotroph adenomas, 4 prolactinomas, 1 FSHoma, and in 6 normal pituitaries. Furthermore, we investigated the relationship between clinical data and gene expression. A subset was screened for GADD45γ mutations by single strand conformation polymorphism analysis (SSCP) and sequencing. All normal human tissues expressed GADD45γ, MEG3, and p8 mRNA. For GADD45γ, significantly lower expression levels were found in nonfunctioning adenomas compared with normal pituitary and somatotroph adenomas. P8 and MEG3 mRNA levels were significantly lower in nonfunctioning and corticotroph adenomas compared with normal pituitary. Expression of GADD45γ was significantly higher in pituitary adenomas of female patients. No mutation was found in the GADD45γ gene. GADD45γ, MEG3, and p8 appear to have physiological functions in a variety of human tissues. GADD45γ, MEG3, and P8 may be involved in the pathogenesis of nonfunctioning and corticotroph pituitary tumours. Female gender seems to predispose to slightly higher GADD45γ expression in pituitary adenomas. Mutations of the GADD45γ are unlikely to be involved in the pathogenesis of pituitary adenomas.
    08/2014; 46(9):644-50.
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    ABSTRACT: Acromegaly is associated with an increased prevalence of glucose metabolism disorders. Clinically confirmed diabetes mellitus is observed in approximately one quarter of all patients with acromegaly and is known to have a worse prognosis in these patients.
    European journal of endocrinology / European Federation of Endocrine Societies. 07/2014; 171(1):59-68.
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    ABSTRACT: Motivation is important for learning and cognition. While dopaminergic (D2) transmission in the ventral striatum (VS) is associated with motivation, learning and cognition are more strongly associated with function of the dorsal striatum, including activation in the caudate nucleus. A recent study found an interaction between intrinsic motivation and the DRD2/ANKK1 polymorphism (rs1800497), suggesting that A-carriers of rs1800497 are significantly more sensitive to motivation in order to improve during working memory (WM) training. Using data from the two large-scale imaging genetic datasets - IMAGEN (n=1080, age 13-15 years) and BrainChild (n~300, age 6-27) - we investigated whether rs1800497 is associated with WM. In the IMAGEN-dataset, we tested whether VS/caudate activation during reward anticipation was associated with WM performance and whether rs1800497 and VS/caudate activation interact to affect WM performance. We found that rs1800497 was associated with WM performance in IMAGEN and BrainChild. Higher VS and caudate activation during reward processing were significantly associated with higher WM performance (p<0.0001). An interaction was found between the DRD2/ANKK1 polymorphism rs1800497 and VS activation during reward anticipation on WM (p<0.01), such that carriers of the minor allele (A) showed a significant correlation between VS activation and WM, while the GG homozygotes did not, suggesting that the effect of VS BOLD on WM is modified by inter-individual genetic differences related to D2 dopaminergic transmission.Neuropsychopharmacology accepted article peview online, 09 April 2014; doi:10.1038/npp.2014.83.
    Neuropsychopharmacology: official publication of the American College of Neuropsychopharmacology 04/2014; · 8.68 Impact Factor
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    ABSTRACT: Despite the recognition that cortical thickness is heritable and correlates with intellectual ability in children and adolescents, the genes contributing to individual differences in these traits remain unknown. We conducted a large-scale association study in 1583 adolescents to identify genes affecting cortical thickness. Single-nucleotide polymorphisms (SNPs; n=54 837) within genes whose expression changed between stages of growth and differentiation of a human neural stem cell line were selected for association analyses with average cortical thickness. We identified a variant, rs7171755, associating with thinner cortex in the left hemisphere (P=1.12 × 10(-)(7)), particularly in the frontal and temporal lobes. Localized effects of this SNP on cortical thickness differently affected verbal and nonverbal intellectual abilities. The rs7171755 polymorphism acted in cis to affect expression in the human brain of the synaptic cell adhesion glycoprotein-encoding gene NPTN. We also found that cortical thickness and NPTN expression were on average higher in the right hemisphere, suggesting that asymmetric NPTN expression may render the left hemisphere more sensitive to the effects of NPTN mutations, accounting for the lateralized effect of rs7171755 found in our study. Altogether, our findings support a potential role for regional synaptic dysfunctions in forms of intellectual deficits.Molecular Psychiatry advance online publication, 11 February 2014; doi:10.1038/mp.2013.197.
    Molecular psychiatry 02/2014; · 15.05 Impact Factor
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    ABSTRACT: We determined the prognostic value of transient increases in high-sensitive serum troponin I (hsTnI) during a marathon and its association with traditional cardiovascular risk factors and imaging-based risk markers for incident coronary events and all-cause mortality in recreational marathon runners. Baseline data of 108 marathon runners, 864 age-matched controls and 216 age- and risk factor-matched controls from the general population were recorded and their coronary event rates and all-cause mortality after 6 ± 1 years determined. hsTnI was measured in 74 marathon finishers before and after the race. Other potential predictors for coronary events, i.e., Framingham Risk Score (FRS), coronary artery calcium (CAC) and presence of myocardial fibrosis as measured by magnetic resonance imaging-based late gadolinium enhancement (LGE), were also assessed. An increase beyond the 99 % hsTnI-threshold, i.e., 0.04 μg/L, was observed in 36.5 % of runners. FRS, CAC, or prevalent LGE did not predict hsTnI values above or increases in hsTnI beyond the median after the race, nor did they predict future events. However, runners with versus without LGE had higher hsTnI values after the race (median (Q1/Q3), 0.08 μg/L (0.04/0.09) versus 0.03 μg/L (0.02/0.06), p = 0.039), and higher increases in hsTnI values during the race (median (Q1/Q3), 0.05 μg/L (0.03/0.08) versus 0.02 μg/L (0.01/0.05), p = 0.0496). Runners had a similar cumulative event rate as age-matched or age- and risk factor-matched controls, i.e., 6.5 versus 5.0 % or 4.6 %, respectively. Event rates in runners with CAC scores <100, 100-399, and ≥400 were 1.5, 12.0, and 21.4 % (p = 0.002 for trend) and not different from either control group. Runners with coronary events had a higher prevalence of LGE than runners without events (57 versus 8 %, p = 0.003). All-cause mortality was similar in marathon runners (3/108, 2.8 %) and controls (26/864, 3.0 % or 5/216, 2.4 %, respectively). Recreational marathon runners with prevalent myocardial fibrosis develop higher hsTnI values during the race than those without. Increasing coronary artery calcium scores and prevalent myocardial fibrosis, but not increases in hsTnI are associated with higher coronary event rates. All-cause mortality in marathon runners is similar to that in risk factor-matched controls.
    Archiv für Kreislaufforschung 01/2014; 109(1):391. · 7.35 Impact Factor
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    ABSTRACT: Background: Medullary thyroid cancer (MTC) is a rare tumor entity. The contents of best supportive care (BSC) have not been defined in advanced MTC. The objective of this work is to describe the epidemiology, the treatment patterns with respect to symptom management, as well as palliative treatment and associated costs. Method: A Delphi panel with 9 clinical experts experienced in treating MTC was conducted to obtain details on the epidemiology of MTC and to gain insights into the therapeutic options considered for BSC in advanced MTC in Germany. Unit costs were applied to the described resources from the perspective of the German National Healthcare System in 2011. Results: The annual incidence of MTC in Germany was estimated at about 220. 32% of all patients were estimated to have aggressive/symptomatic MTC, with an estimated mean survival of 36.7 months (median: 36 months). The core element of BSC is relief of symptoms to maintain quality of life. The total mean cost of BSC per patient/year was estimated at € 9,248, lifetime cost at € 28,283. Conclusion: There was consistent agreement within the panel on the epidemiology of MTC and on the structure of the provided therapeutic measures for BSC in advanced MTC, also defining the management of symptoms as a crucial goal of treatment. © 2014 S. Karger GmbH, Freiburg.
    Oncology research and treatment. 01/2014; 37(6):316-22.
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    ABSTRACT: Neuroticism involves a tendency for enhanced emotional and cognitive processing of negative affective stimuli and a propensity to worry and be anxious. It is known that this trait modulates fear learning and the activation of brain regions involved in it such as the amygdala, hippocampus and prefrontal cortex and their connectivity. Thirty-nine (21 female) 14-year-old healthy adolescents participated in functional magnetic resonance imaging (fMRI) of aversive pavlovian differential delay conditioning. An unpleasant sound served as unconditioned stimulus and pictures of neutral male faces as conditioned stimuli (CS+, followed by the US in 50% of the cases; CS- never followed by the US). During acquisition (CS+/- differentiation), higher levels of neuroticism were associated with a stronger interaction between the right amygdala and the right hippocampus as well as the right amygdala and prefrontal cortical regions, specifically ventromedial prefrontal cortex, dorsolateral prefrontal cortex and anterior cingulate cortex. The association of stronger conditionability of fear and connectivity of brain regions related to consolidation of fear associations and neuroticism points to underlying mechanisms of the enhanced propensity for anxiety disorders in highly neurotic participants. This is especially important in adolescence, a vulnerable time for the onset of mental disorders such as anxiety disorders.Neuropsychopharmacology accepted article preview online, 15 October 2013. doi:10.1038/npp.2013.287.
    Neuropsychopharmacology: official publication of the American College of Neuropsychopharmacology 10/2013; · 8.68 Impact Factor
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    ABSTRACT: Genetic variation in a genomic region on chromosome 15q25.1, which encodes the alpha5, alpha3, and beta4 subunits of the cholinergic nicotinic receptor genes, confers risk to smoking and nicotine dependence (ND). Neural reward-related responses have previously been identified as important factors in the development of drug dependence involving ND. Applying an imaging genetics approach in two cohorts (N=487; N=478) of healthy non-smoking adolescents we aimed to elucidate the impact of genome-wide significant smoking-associated variants in the CHRNA5-CHRNA3-CHRNB4 gene cluster on reward-related neural responses in central regions such as the striatum, orbitofrontal and anterior cingulate cortex and personality traits related to addiction. In both samples carriers of the rs578776 GG compared with AG/AA genotype showed a significantly lower neural response to reward outcomes in the right ventral and dorsal anterior cingulate cortex but not the striatum or the orbitofrontal cortex. Rs578776 was unrelated to neural reward anticipation or reward magnitude. Significantly higher scores of anxiety sensitivity in GG compared to AG/AA carriers were found only in sample 1. Associations with other personality traits were not observed. Our findings suggest that the rs578776 risk variant influences susceptibility to ND by dampening the response of the anterior cingulate cortex to reward feedback, without recruiting the striatum or orbitofrontal cortex during feedback or anticipation. Thus it seems to have a major role in the processing of and behavioral adaptation to changing reward outcomes.Neuropsychopharmacology accepted article preview online, 21 May 2013; doi:10.1038/npp.2013.131.
    Neuropsychopharmacology: official publication of the American College of Neuropsychopharmacology 05/2013; · 8.68 Impact Factor
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    ABSTRACT: BACKGROUND:: For patients treated with citalopram, it was recently shown that serum concentrations above 50 ng/mL on day 7 of treatment are associated with an improved therapeutic outcome. The aim of this post hoc analysis was to calculate a potential cost-effectiveness of therapeutic drug monitoring (TDM) considering costs for hospitalization, medication, and drug analysis. METHODS:: The study included patients with major depression. Weekly measurements of serum concentrations and assessments of psychopathology were conducted. RESULTS:: Fifty-five patients were included in this analysis. For patients with high citalopram serum concentrations (>50 ng/mL), the mean duration of hospitalization was 49 ± 20 days, and it was 72 ± 37 days (P = 0.03) in the group with low drug concentrations (<50 ng/mL). Considering daily costs for hospitalization of 250&OV0556;, the potential savings amounted to 5750&OV0556; per patient for the 23 days. Assuming that 11% of the variation of duration of hospitalization per patient were attributed to the serum concentration of the drug, the resulting savings were 633&OV0556; per patient. Considering the officially listed price of 21&OV0556; per TDM assay, total costs for weekly measurements over a period of 10 weeks of hospitalization were 210&OV0556;. In the groups with high and low serum concentrations, daily costs for citalopram medication were 3.00 ± 0.80&OV0556; and 2.42 ± 0.70&OV0556;, respectively (P = 0.002), and the mean number of comedications was nearly identical, that is, 1.87 ± 1.74 and 1.81 ± 1.86 drugs, respectively (P = 0.919). CONCLUSIONS:: The data taken together indicate that TDM-guided dosing of citalopram has the potential to be cost effective by reducing the length of hospitalization.
    Therapeutic drug monitoring 05/2013; · 2.43 Impact Factor
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    ABSTRACT: BACKGROUND: Coronary atherosclerosis can be detected by computed tomography. The amount of coronary artery calcification (CAC) is related to cardiovascular risk factors, the strength of the gender specific relation between lipoprotein parameters and CAC has not extensively been studied. Especially, the role of routinely determined lipoproteins in contrast to less common and computed lipid parameters (e.g. ratios) remains to be clarified. METHODS AND RESULTS: The study cohort (n = 3956, 52% women, age 45-75 years) was randomly selected from three cities of a German metropolitan area. Lipoproteins-low-and high density lipoprotein (LDL-C/HDL-C), total cholesterol, apolipoprotein A-1 and B (apoA-1/apoB) as well as lipoprotein (a) (Lp(a)) were measured, while non-HDL-C was calculated. All participants received an electron-beam computed tomography (EBCT) for quantification of CAC. Adjusted for age and cardiovascular risk factors, CAC increased by a factor of 1.97 (1.51-2.57, 95% CI) and 1.94 (1.53-2.45, 95% CI) comparing the fourth to the first quartile of LDL-C for men and women, respectively. This association with LDL-C was also found after dichotomization of CAC at thresholds >0, ≥100 and ≥400. The best association of CAC was, however, found to be apoB and the second best was non HDL-C, in both men and women. For apoB, the model including all risk factors reached an explained variance for CAC of 20.2% in men and of 21.6% in women. When using LDL-C as a given parameter according to the current practice and advice, HDL-C in men and apoB in women provided an additional but small benefit. CONCLUSION: ApoB showed the best association with CAC compared to all other tested lipoproteins. Neither the ratio LDL-C/HDL-C nor apoB/apoA-1, or Lp(a) revealed a closer association with CAC. While lipoproteins are related to CAC more closely in women than in men, their association with CAC is, however, not particularly strong. Our results may influence primary and secondary prevention advices in order to improve detection of subclinical atherosclerosis, for which lipoprotein parameters can only play a minor role.
    Atherosclerosis 05/2013; · 3.71 Impact Factor
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    Molecular Psychiatry 04/2013; · 14.90 Impact Factor
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    ABSTRACT: Abnormalities in white-matter (WM) microstructure, as lower fractional anisotropy (FA), have been reported in adolescent-onset bipolar disorder and in youth at familial risk for bipolarity. We sought to determine whether healthy adolescents with subthreshold bipolar symptoms (SBP) would have early WM microstructural alterations and whether those alterations would be associated with differences in gray-matter (GM) volumes. Forty-two adolescents with three core manic symptoms and no psychiatric diagnosis, and 126 adolescents matched by age and sex, with no psychiatric diagnosis or symptoms, were identified after screening the IMAGEN database of 2223 young adolescents recruited from the general population. After image quality control, voxel-wise statistics were performed on the diffusion parameters using tract-based spatial statistics in 25 SBP adolescents and 77 controls, and on GM and WM images using voxel-based morphometry in 30 SBP adolescents and 106 controls. As compared with healthy controls, adolescents with SBP displayed lower FA values in a number of WM tracts, particularly in the corpus callosum, cingulum, bilateral superior and inferior longitudinal fasciculi, uncinate fasciculi and corticospinal tracts. Radial diffusivity was mainly higher in posterior parts of bilateral superior and inferior longitudinal fasciculi, inferior fronto-occipital fasciculi and right cingulum. As compared with controls, SBP adolescents had lower GM volume in the left anterior cingulate region. This is the first study to investigate WM microstructure and GM morphometric variations in adolescents with SBP. The widespread FA alterations in association and projection tracts, associated with GM changes in regions involved in mood disorders, suggest altered structural connectivity in those adolescents.Molecular Psychiatry advance online publication, 30 April 2013; doi:10.1038/mp.2013.44.
    Molecular psychiatry 04/2013; · 15.05 Impact Factor
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    ABSTRACT: Reward learning represents a crucial mechanism in the acquisition and maintenance of addictive behavior. The underlying neurobiological foundations and associated neurobiological pathways are identified in this review and similarities between substance abuse and behavioral addictions will be discussed. In the second section current neuroimaging findings on neurobiological mechanisms of pathological gambling and computer and internet addiction are discussed. The main focuses are on changes in neurocognitive processes, such as cue reactivity, reward and punishment processing and behavioral control.
    Der Nervenarzt 04/2013; · 0.80 Impact Factor
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    ABSTRACT: Coronary risk factors in patients with acromegaly after first-line transsphenoidal surgery (TSS) or first-line somatostatine analogue (SSA) treatment have rarely been examined. Aim of this study was an evaluation of cardiovascular risk factors and left ventricular hypertrophy (LVH) in 3 different patient groups with treatment naïve, active (ACT), first-line medically controlled (MED) and first-line surgically treated (SUR) acromegaly and a calculation of the Framingham Weibull Risk Score (FS).Retrospective comparative matched case-control study.40 acromegalic patients (cases aged 45-74 years, 23 men) were matched with respect to age and gender to 200 controls from the general population. 13 patients had treatment-naïve acromegaly (ACT), 12 patients were SSA treated (MED) and 15 patients were operated by TSS (SUR). Coronary risk factors were assessed after 12 months of treatment by interviews and direct laboratory measurements. Only patients normalized for IGF-I in MED and SUR group were included. FS and odds ratios (OR) from multiple conditional logistic regression (matched for age and gender, adjusted for BMI) were calculated.Compared to matched controls ACT patients had higher HbA1c levels (6.9±1.4 vs. 5.5±0.7% (p<0.0001)) and an increased prevalence of left ventricular hypertrophy (LVH) (30.8 vs. 3.2% (p=0.007). MED and SUR groups were similar for gender, age, disease duration and IGF-I levels at diagnosis. Compared to matched controls, MED patients had a significantly increased diastolic blood pressure (89±9 vs. 79±11 mmHg (p=0.001), prevalence of LVH (41.7 vs. 1.7% (p<0.0001), prevalence of diabetes mellitus (33.3 vs. 10.0% (p=0.03)), higher HbA1c levels (6.8±1.3 vs. 5.5±0.7% (p=0.0005)) and a higher FS (21.2±9.7 vs. 12.4±7.7% (p=0.002), OR 1.11 [1.02-1.21] (p=0.01)) while in the SUR group only higher prevalences of LVH (40.0 vs. 4.1% (p<0.0001)) and HbA1c levels (6.4±1.2 vs. 5.5±0.8% (p=0.006)) were found compared to controls.When comparing treatment naive, medically treated and surgically cured patients with acromegaly to age- and gender-matched subjects from the general population, we have found an increased cardiovascular risk in patients at 12 months after first-line SSA treatment but not in patients after first-line surgery.
    Experimental and Clinical Endocrinology & Diabetes 01/2013; · 1.56 Impact Factor
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    ABSTRACT: Background Coronary artery calcium (CAC) indicates coronary atherosclerosis and can be present in very early stages of the disease. The conversion from no CAC to any CAC reflects an important step of the disease process as cardiovascular risk is increased in persons even with mildly elevated CAC. We sought to identify risk factors that determined incident CAC>0 in men and women from an unselected general population with a special focus on the role of smoking. Methods All 4814 persons that were initially studied in the Heinz Nixdorf Recall Study were invited to participate in the follow-up examination after 5.1±0.3 years. All traditional Framingham risk factors were quantified using standard techniques. Smokers were categorized in never, former and present smokers. The CAC scores were measured from EBCT using the Agatston method. Results Overall, out of 342 men and 919 women with zero CAC at baseline, 107 (31.3%) men and 210 (22.9%) women had CAC>0 at second examination. In multivariable analysis, age (OR estimate per 5 years: 1.34 (95%CI: 1.21-1.47)), LDL cholesterol (per 10 mg/dl: 1.05 (95%CI: 1.01-1.10)), systolic blood pressure (per 10 mmHg: 1.19 (95%CI: 1.11-1.28)) and current smoking (1.49 (95%CI: 1.04-2.15)) were independent predictors of CAC onset. The probability of CAC onset steadily increased with age from 23.3% (men) and 15.3% (women) at age 45-49 years to 66.7% (men) and 42.9% (women) at age 70-74 years. The difference in age-dependent conversion rates was quantified by years between reaching a given level of CAC onset probability. We found a consistent pattern with respect to smoking status: presently (formerly) smoking middle-aged men convert to positive CAC 10 (5) years earlier than never smokers, for women (middle-aged to elderly) this time span is 8 (5) years. Conclusion Several traditional CVD risk factors are associated with CAC onset during 5 years follow-up. CAC onset is accelerated by approximately 10 (5) years for present (former) compared to never smokers.
    Atherosclerosis 01/2013; · 3.71 Impact Factor
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    ABSTRACT: Die Zahl von Betroffenen mit ,,Verhaltenssüchten“ nimmt vor allem bei Jugendlichen und jungen Erwachsenen deutlich zu. Psychiater und Psychotherapeuten erwarten Hinweise zur diagnostischen Einordnung und zum therapeutischen Vorgehen. Wir diskutieren nosologische Aspekte und empfehlen Glücksspiel und exzessiven Computer- und Internetgebrauch als Verhaltenssüchte zu behandeln. In Einzelfällen kann das Suchtmodell auch bei pathologischem Kaufen, exzessivem Sexualverhalten und Adipositas therapeutisch genutzt werden.
    Der Nervenarzt 01/2013; 84(5). · 0.80 Impact Factor
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    ABSTRACT: Für die Entstehung und Aufrechterhaltung von Suchtverhalten kommt dem belohnungsassoziierten Lernen eine zentrale Rolle zu. Die hierbei zugrunde liegenden neurobiologischen Grundlagen und die assoziierten neuropsychologischen Mechanismen werden vorgestellt und Parallelen von Substanzabhängigkeit und Verhaltenssüchten aufgezeigt. Im zweiten Abschnitt des Beitrages werden spezifische Befunde zu Veränderungen neurobiologischer Prozesse bei pathologischem Glücksspielen und Computer- und Internetsucht mittels funktioneller Bildgebung herausgearbeitet. Der Schwerpunkt liegt dabei auf Veränderungen in neurokognitiven Prozessen wie Reiz-Reaktivität, Verarbeitung von Belohnung und Bestrafung sowie Verhaltenskontrolle.
    Der Nervenarzt 01/2013; 84(5). · 0.80 Impact Factor
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    ABSTRACT: Background: The American (ATA) and the European Thyroid Association (ETA) recommend a thyroid scintiscan for the detection of a suspected autonomy only when serum thyrotropin (TSH) levels are low or suppressed. If ultrasound reveals a thyroid nodule > 1.0 cm and TSH is normal, a fine-needle biopsy is recommended without a preceding scintiscan as the next step. The aim of this prospective study was to evaluate the incidence of reduced or suppressed TSH in 100 autonomous adenoma > 1.0 cm and to clarify, if normal TSH does substantially exclude a focal autonomy. When the study was conducted no data of German patients were available. Patients and Methods: An unselected group of 496 patients with a nodular goiter was continuously screened by scintiscan in order to detect 100 autonomous adenoma > 1.0 cm for the study. The following investigations were carried out: ultrasound, scintiscan and laboratory tests (fT3, fT4, TSH, TPO-antibodies). The reference range of TSH was 0.4 to 4.0 µU/ml.Results: 21% of patients (100/476) with a nodular goiter had a focal autonomy. 32 % (32/100) of autonomous adenoma revealed a reduced (< 0.4 µU/ml) or completely suppressed TSH, while in 68 % (68/100) normal TSH level were found.Conclusion: In Germany autonomous adenoma are still frequent (21 % of all thyroid nodules). Most of them (68 %) reveal normal TSH levels. Our data demonstrate, that there is no relevant connection between TSH level and autonomous adenoma detected by scintiscan. In most cases, TSH is not able to discriminate, whether a nodule is autonomous or not. Biopsy of undetected autonomous nodules should not be performed, as they often show cytological features of follicular neoplasias. In thyroid nodules > 1.0 cm a scintiscan should routinely be performed in primary diagnostics to avoid unnecessary fine-needle biopsy of autonomous adenoma.
    DMW - Deutsche Medizinische Wochenschrift 10/2012; 137(41):2089-92. · 0.65 Impact Factor

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9k Citations
1,768.79 Total Impact Points

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  • 1997–2014
    • University Hospital Essen
      • • Institut für Medizinische Informatik, Biometrie und Epidemiologie
      • • Institut für Medizinische Psychologie und Verhaltensimmunbiologie
      • • Klinik für Kardiologie
      • • Klinik für Thorax- und Kardiovaskuläre Chirurgie
      • • Klinik für Endokrinologie
      Essen, North Rhine-Westphalia, Germany
  • 1995–2014
    • University of Duisburg-Essen
      • • Department of Internal and Integrative Medicine
      • • Faculty of Medicine
      Essen, North Rhine-Westphalia, Germany
    • Universitätsklinikum Jena
      Jena, Thuringia, Germany
  • 2013
    • University of Bonn
      Bonn, North Rhine-Westphalia, Germany
  • 2000–2013
    • Central Institute of Mental Health
      • Klinik für Abhängiges Verhalten und Suchtmedizin
      Mannheim, Baden-Wuerttemberg, Germany
  • 2009
    • Friedrich-Alexander Universität Erlangen-Nürnberg
      Erlangen, Bavaria, Germany
    • Universitätsklinikum Düsseldorf
      Düsseldorf, North Rhine-Westphalia, Germany
  • 2006–2009
    • Endokrinologikum Hamburg
      Hamburg, Hamburg, Germany
    • Charité Universitätsmedizin Berlin
      • Medical Department, Division of Hepatology and Gastroenterology
      Berlin, Land Berlin, Germany
  • 2003–2009
    • Universität Heidelberg
      • Central Institute of Mental Health
      Heidelberg, Baden-Wuerttemberg, Germany
    • University of Innsbruck
      • Institute of Biochemistry
      Innsbruck, Tyrol, Austria
  • 1994–2009
    • Johannes Gutenberg-Universität Mainz
      • Klinik und Poliklinik für Psychosomatische Medizin und Psychotherapie
      Mainz, Rhineland-Palatinate, Germany
  • 1989–2009
    • University of Tuebingen
      • • Department of Psychiatry and Psychotherapy
      • • Department of Neurology
      Tübingen, Baden-Wuerttemberg, Germany
  • 2008
    • Universität Mannheim
      Mannheim, Baden-Württemberg, Germany
    • Harvard Medical School
      • Department of Medicine
      Boston, Massachusetts, United States
    • Brigham and Women's Hospital
      • Division of General Internal Medicine and Primary Care
      Boston, MA, United States
    • Universitätsklinikum Freiburg
      • Department of Psychiatry and Psychotherapy
      Freiburg, Lower Saxony, Germany
    • Heinrich-Heine-Universität Düsseldorf
      • Institut für Medizinische Soziologie
      Düsseldorf, North Rhine-Westphalia, Germany
  • 2007
    • Technische Universität Dresden
      Dresden, Saxony, Germany
  • 2005
    • Deutsches Herzzentrum München
      München, Bavaria, Germany
    • Kliniken Essen-Mitte Knappschafts-Krankenhaus
      Essen, North Rhine-Westphalia, Germany
    • Universität Ulm
      Ulm, Baden-Württemberg, Germany
  • 2002
    • Humboldt-Universität zu Berlin
      • Department of Psychology
      Berlin, Land Berlin, Germany
  • 2001
    • Clinic for Minimally Invasive Surgery
      Berlín, Berlin, Germany
    • Royal Prince Alfred Hospital
      Camperdown, New South Wales, Australia
  • 1992–1999
    • Austrian Academy of Sciences
      • Institut für Biomedizinische Alternsforschung
      Vienna, Vienna, Austria
  • 1990–1996
    • Ludwig-Maximilian-University of Munich
      • Department of Internal Medicine II
      München, Bavaria, Germany
  • 1992–1995
    • Psychiatrische Universitätsklinik Zürich
      Zürich, Zurich, Switzerland
  • 1985–1995
    • Universitätsklinikum Tübingen
      Tübingen, Baden-Württemberg, Germany
  • 1993
    • University of Pennsylvania
      • Department of Psychiatry
      Philadelphia, PA, United States
  • 1988–1993
    • Technische Universität München
      • Medizinische Klinik und Poliklinik III - Hämatologie/Onkologie
      München, Bavaria, Germany
  • 1979–1988
    • University Hospital München
      München, Bavaria, Germany