Lege Artis Medicinae

[The altered role of coagulase-negative staphylococci]

SZALKA András

DECEMBER 18, 2012

Lege Artis Medicinae - 2012;22(12)

[Coagulase-negative staphylococci are differentiated from the more virulent Staphylococcus aureus by their inability to produce coagulase enzyme. Currently, more than 40 recognized species of coagulasenegative staphylococci are known. The great majority of these bacteria are normal inhabitants of the human skin and mucous membranes. Therefore, it is very difficult to distinguish isolates that are of clinical significance. Recently, coagulase-negative staphylococci have been increasingly detected to cause clinically significant infections. This is due in most cases to the increasing use of medical devices inserted or implanted in the human body. This overview discusses the various infections caused by these microbes, as well as their pathogenesis, epidemiology, and management.]

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Lege Artis Medicinae

[Cost minimization analysis of basal insulin analogues in the treatment of type 2 diabetes]

MERÉSZ Gergő, TABÁK Gy. Ádám, KALÓ Zoltán

[INTRODUCTION - Basal insulin analogues are essential drugs for the treatment of type 2 diabetes mellitus. Basal insulin analogues have been shown to reduce the frequency of hypoglycaemia versus NPH insulin, and thus may be beneficial in the treatment of type 2 diabetes. Here we present a cost-minimisation analysis of basal insulin analogues, comparing insulin glargine and insulin detemir available in Hungary. METHODS - A literature review was conducted to identify randomized, controlled clinical trials with a duration of 12 weeks or more in which a direct comparison of insulin glargine and insulin detemir was made in patients with type 2 diabetes. In a meta-analysis of the eligible trials, the following endpoints were investigated: metabolic status, body weight, frequency of hypoglycaemia, insulin doses administered and the number of insulin injections required. If a high heterogeneity (I2>75%) was found, meta-regression was performed to identify the underlying reasons. The funder’s perspective was applied in the cost-minimization analysis by taking into account the cost of the drug and of medical devices necessary for its administration, based on the daily number of insulin injections. RESULTS - No further studies were found in addition to those included in a metaanalysis published by The Cochrane Library. On the basis of three eligible studies, insulin detemir was injected more frequently compared with glargine (weighted mean difference: 0.42 95% CI 0.14-0.69 injections/day). High heterogeneity was present in case of two endpoints: the incidence of overall hypoglycaemia per patient-year (I2=83%), and daily basal insulin dose in units per body weight (I2=94%). The reason for the high heterogeneity in hypoglycaemia rates was not identified by meta-regression; however, the difference in insulin doses per body weight was negatively associated with body weight (-0.027 IU/kg per 1 kg, 95%CI: -0.051; -0.004). On the basis of the present meta-analysis and meta-regression, our calculations suggest that treating an average weight (90 kg) patient with type 2 diabetes with insulin glargine would result in an annual cost reduction of 93 452 HUF compared with insulin detemir by employing gross public drug prices. CONCLUSION - On the basis of the available clinical evidence, insulin glargine might be a cost-saving alternative of insulin detemir in an average-weight patient with type 2 diabetes. In an era of scarce resources, the role of therapeutic alternatives offering cost savings with the same efficacy become more important. The generalisability of our conclusions might be influenced by potential differences in the manufacturers’ claw-back rate of detemir vs glargine insulin.]

Lege Artis Medicinae

[Is a Good Death Possible? ]

HEGEDÛS Katalin

Lege Artis Medicinae

[Pneumococcal conjugate vaccine for adults: a new paradigm]

LIPTÁK Judit

Lege Artis Medicinae

[The Man who Compiled the First Russian Pharmacopoeia – Keresztély Peken (1730-1779) ]

V. MOLNÁR László

Lege Artis Medicinae

[3rd Congress of the Hungarian Society of Personalized Medicine]

JELINEK Ivett

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[Change of resistance among Gram-positive bacteria]

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[Physicians are faced with increasingly rapid emergence and spread of antibiotic resistant Gram-negative bacilli and, in particular, Gram-positive bacteria. It poses a major problem for hospitals and general practice as well. The article focuses on the change of resistance of four important and frequently occurring Gram-positive bacteria (Staphylococcus aureus, coagulase-negative staphylococci, Enterococcus spp. and Streptococcus pneumoniae). Among the therapeutic choices recently introduced fluoroquinolones, oxazolidinones, streptogramins and ketolids are reviewed.]

Clinical Neuroscience

Neuroscience highlights: Main cell types underlying memory and spatial navigation

KRABOTH Zoltán, KÁLMÁN Bernadette

Interest in the hippocampal formation and its role in navigation and memory arose in the second part of the 20th century, at least in part due to the curious case of Henry G. Molaison, who underwent brain surgery for intractable epilepsy. The temporal association observed between the removal of his entorhinal cortex along with a significant part of hippocampus and the developing severe memory deficit inspired scientists to focus on these regions. The subsequent discovery of the so-called place cells in the hippocampus launched the description of many other functional cell types and neuronal networks throughout the Papez-circuit that has a key role in memory processes and spatial information coding (speed, head direction, border, grid, object-vector etc). Each of these cell types has its own unique characteristics, and together they form the so-called “Brain GPS”. The aim of this short survey is to highlight for practicing neurologists the types of cells and neuronal networks that represent the anatomical substrates and physiological correlates of pathological entities affecting the limbic system, especially in the temporal lobe. For that purpose, we survey early discoveries along with the most relevant neuroscience observations from the recent literature. By this brief survey, we highlight main cell types in the hippocampal formation, and describe their roles in spatial navigation and memory processes. In recent decades, an array of new and functionally unique neuron types has been recognized in the hippocampal formation, but likely more remain to be discovered. For a better understanding of the heterogeneous presentations of neurological disorders affecting this anatomical region, insights into the constantly evolving neuroscience behind may be helpful. The public health consequences of diseases that affect memory and spatial navigation are high, and grow as the population ages, prompting scientist to focus on further exploring this brain region.

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[Association between cyclothymic affective temperament and hypertension]

NEMCSIK János, BATTA Dóra, KŐRÖSI Beáta, RIHMER Zoltán

[Affective temperaments (cyclothymic, hypertymic, depressive, anxious, irritable) are stable parts of personality and after adolescent only their minor changes are detectable. Their connections with psychopathology is well-described; depressive temperament plays role in major depression, cyclothymic temperament in bipolar II disorder, while hyperthymic temperament in bipolar I disorder. Moreover, scientific data of the last decade suggest, that affective temperaments are also associated with somatic diseases. Cyclothymic temperament is supposed to have the closest connection with hypertension. The prevalence of hypertension is higher parallel with the presence of dominant cyclothymic affective temperament and in this condition the frequency of cardiovascular complications in hypertensive patients was also described to be higher. In chronic hypertensive patients cyclothymic temperament score is positively associated with systolic blood pressure and in women with the earlier development of hypertension. The background of these associations is probably based on the more prevalent presence of common risk factors (smoking, obesity, alcoholism) with more pronounced cyclothymic temperament. The scientific importance of the research of the associations of personality traits including affective temperaments with somatic disorders can help in the identification of higher risk patient subgroups.]

Clinical Neuroscience

Life threatening rare lymphomas presenting as longitudinally extensive transverse myelitis: a diagnostic challenge

TOLVAJ Balázs, HAHN Katalin, NAGY Zsuzsanna, VADVÁRI Árpád, CSOMOR Judit, GELPI Ellen, ILLÉS Zsolt, GARZULY Ferenc

Background and aims – Description of two cases of rare intravascular large B-cell lymphoma and secondary T-cell lymphoma diagnosed postmortem, that manifested clinically as longitudinally extensive transverse myelitis (LETM). We discuss causes of diagnostic difficulties, deceptive radiological and histological investigations, and outline diagnostic procedures based on our and previously reported cases. Case reports – Our first case, a 48-year-old female was admitted to the neurological department due to paraparesis. MRI suggested LETM, but the treatments were ineffective. She died after four weeks because of pneumonia and untreatable polyserositis. Pathological examination revealed intravascular large B-cell lymphoma (IVL). Our second case, a 61-year-old man presented with headache and paraparesis. MRI showed small bitemporal lesions and lesions suggesting LETM. Diagnostic investigations were unsuccessful, including tests for possible lymphoma (CSF flow cytometry and muscle biopsy for suspected IVL). Chest CT showed focal inflammation in a small area of the lung, and adrenal adenoma. Brain biopsy sample from the affected temporal area suggested T-cell mediated lymphocytic (paraneoplastic or viral) meningoencephalitis and excluded diffuse large B-cell lymphoma. The symptoms worsened, and the patient died in the sixth week of disease. The pathological examination of the presumed adenoma in the adrenal gland, the pancreatic tail and the lung lesions revealed peripheral T-cell lymphoma, as did the brain and spinal cord lesions. Even at histological examination, the T-cell lymphoma had the misleading appearance of inflammatory condition as did the MRI. Conclusion – Lymphoma can manifest as LETM. In cases of etiologically unclear atypical LETM in patients older than 40 years, a random skin biopsy (with subcutaneous adipose tissue) from the thigh and from the abdomen is strongly recommended as soon as possible. This may detect IVL and provide the possibility of prompt chemotherapy. In case of suspicion of lymphoma, parallel examination of the CSF by flow cytometry is also recommended. If skin biopsy is negative but lymphoma suspicion remains high, biopsy from other sites (bone marrow, lymph nodes or adrenal gland lesion) or from a simultaneously existing cerebral lesion is suggested, to exclude or prove diffuse large B-cell lymphoma, IVL, or a rare T-cell lymphoma.