Lege Artis Medicinae

[Randomized phase III study of gemcitabine-cisplatin versus etoposide-cisplatin in the treatment of locally advanced or metastatic non-small-cell lung cancer]

REINDL Ildikó

JANUARY 20, 2003

Lege Artis Medicinae - 2003;13(01)

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Lege Artis Medicinae

[Errors and mistakes in laboratory medicine]

ENDRŐCZI Elemér

[The unacceptable results of laboratory testing derive from the insufficient preanalytical, analytical and postanalytical processes. In addition to the analytical errors, there are inappropriate testing orders which reflect the failures of diagnostic strategy, and either result in excess testing orders without additional new informations, or in the lack of testing order that would be necessary for efficiency of patient's care. An increasing number of study demonstrate that in majority of cases the cause of erroneous results can be traced back to mistakes in the preanalytical phase (preparation of patient, sample collection). The total quality of the diagnostic strategy depends both on the compliance of tests according to the health condition of patient and the quality performance of laboratory processes. The elimination of the preanalytical errors and the formulation of proper diagnostic strategy requires a close cooperation between physicians and the diagnostic workplaces as well as the application of multidisciplinary guidelines which specify the quality requirements of the whole diagnostic process. Such guidelines are not prepared for specific professional activities and do not replace lower-level professional standards (e.g. for test procedures). Based on evidence-based medicine and the recommendations of international experts such guidelines should cover all elements of quality assurance necessary to achieve efficient diagnostic strategy and testing. There is little doubt that such recommendations will also be useful for rational financing of the health care system.]

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[Hit by multiple disadvantages]

NEMÉNYI Mária

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[Advances in sleep diagnostics]

HORVÁTH Róbert

[Despite the insufficient financial support, the number of the laboratories for sleep diagnostics and the examined patients are rising. The CPAP (Continuous Positive Airway Pressure) equipment playing the main role in the treatment of the obstructive sleep apnoe syndrome (OSAS) is recently available from three neurological centres (Budapest, Debrecen, Pécs). These centres can prescribe the machine as a ”model experiment” with 85% support given by the State Health Care. The increase of the number of the licensed hospitals is expected in the near future, the only condition is the polysomnography background. Differential diagnostics (narcolepsy, RLS, PLMS, sleepdependent laryngospasm, disorders of the circadian rhythm) and the follow-up of the CPAP using patients (indication, contraindication, compliance, CPAP pressure setting, CPAP therapy control) have been emphasized.]

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MATOS Lajos

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[Cardiovascular diseaes and the kidney]

PRÉDA István

[From pathophysiological point of view, the kidney is an integral part of the cardiovascular system. Renal diseases adversely affect the cardiac functions, and disturbances of the cardiovascular system affect adversely renal functions, causing either the decrease of left ventricular functions or manifesting in overt chronic heart failure. Regarding the cardiac manifestations of renal diseases, characteristic features are the symptoms of left ventricular volume and pressure overload, the metabolic effects of the ”uremic toxins” and the frequent infections associated with dialysis and compromised immunologic state, the secunder hyperparathyreosis, as well as the associated conditions like hypertension, diabetes mellitus and coronary atherosclerosis. All these can be the explanation for the frequent cardiovascular death of chronic kidney disease patients. It also stresses the outstanding importance of the decrease of cardiovascular hazard of chronic renal disease patients. The strategy should comprise of an adequate antihypertensive treatment (ACE-inhibitor, AT-II blocking and calcium antagonist), strong antidiabetic control of diabetic patients and the adequate treatment of dyslipidaemia (if exists), as well as antithrombotic aspirin treatment.]

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Clinical Neuroscience

Alexithymia is associated with cognitive impairment in patients with Parkinson’s disease

SENGUL Yildizhan, KOCAK Müge, CORAKCI Zeynep, SENGUL Serdar Hakan, USTUN Ismet

Cognitive dysfunction (CD) is a common non-motor symptom of Parkinson’s disease (PD). Alexithy­mia is a still poorly understood neuropsychiatric feature of PD. Cognitive impairment (especially visuospatial dysfunction and executive dysfunction) and alexithymia share com­mon pathology of neuroanatomical structures. We hypo­thesized that there must be a correlation between CD and alexithymia levels considering this relationship of neuroanatomy. Objective – The aim of this study was to evaluate the association between alexithymia and neurocognitive function in patients with PD. Thirty-five patients with PD were included in this study. The Toronto Alexithymia Scale–20 (TAS-20), Geriatric Depression Inventory (GDI) and a detailed neuropsychological evaluation were performed. Higher TAS-20 scores were negatively correlated with Wechsler Adult Intelligence Scale (WAIS) similarities test score (r =-0.71, p value 0.02), clock drawing test (CDT) scores (r=-0.72, p=0.02) and verbal fluency (VF) (r=-0.77, p<0.01). Difficulty identifying feelings subscale score was negatively correlated with CDT scores (r=-0.74, p=0.02), VF scores (r=-0.66, p=0.04), visual memory immediate recall (r=-0.74, p=0.01). VF scores were also correlated with difficulty describing feelings (DDF) scores (r=-0.66, p=0.04). There was a reverse relationship bet­ween WAIS similarities and DDF scores (r=-0.70, p=0.02), and externally oriented-thinking (r=-0.77,p<0.01). Executive function Z score was correlated with the mean TAS-20 score (r=-62, p=0.03) and DDF subscale score (r=-0.70, p=0.01) Alexithymia was found to be associated with poorer performance on visuospatial and executive function test results. We also found that alexithymia was significantly correlated with depressive symptoms. Presence of alexithymia should therefore warn the clinicians for co-existing CD.

Clinical Neuroscience

Late simultaneous carcinomatous meningitis, temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting with mono-symptomatic vertigo – a clinico-pathological case reporT

JARABIN András János, KLIVÉNYI Péter, TISZLAVICZ László, MOLNÁR Anna Fiona, GION Katalin, FÖLDESI Imre, KISS Geza Jozsef, ROVÓ László, BELLA Zsolt

Although vertigo is one of the most common complaints, intracranial malignant tumors rarely cause sudden asymmetry between the tone of the vestibular peripheries masquerading as a peripheral-like disorder. Here we report a case of simultaneous temporal bone infiltrating macro-metastasis and disseminated multi-organ micro-metastases presenting as acute unilateral vestibular syndrome, due to the reawakening of a primary gastric signet ring cell carcinoma. Purpose – Our objective was to identify those pathophysiological steps that may explain the complex process of tumor reawakening, dissemination. The possible causes of vestibular asymmetry were also traced. A 56-year-old male patient’s interdisciplinary medical data had been retrospectively analyzed. Original clinical and pathological results have been collected and thoroughly reevaluated, then new histological staining and immunohistochemistry methods have been added to the diagnostic pool. During the autopsy the cerebrum and cerebellum was edematous. The apex of the left petrous bone was infiltrated and destructed by a tumor mass of 2x2 cm in size. Histological reexamination of the original gastric resection specimen slides revealed focal submucosal tumorous infiltration with a vascular invasion. By immunohistochemistry mainly single infiltrating tumor cells were observed with Cytokeratin 7 and Vimentin positivity and partial loss of E-cadherin staining. The subsequent histological examination of necropsy tissue specimens confirmed the disseminated, multi-organ microscopic tumorous invasion. Discussion – It has been recently reported that the expression of Vimentin and the loss of E-cadherin is significantly associated with advanced stage, lymph node metastasis, vascular and neural invasion and undifferentiated type with p<0.05 significance. As our patient was middle aged and had no immune-deficiency, the promoting factor of the reawakening of the primary GC malignant disease after a 9-year-long period of dormancy remained undiscovered. The organ-specific tropism explained by the “seed and soil” theory was unexpected, due to rare occurrence of gastric cancer to metastasize in the meninges given that only a minority of these cells would be capable of crossing the blood brain barrier. Patients with past malignancies and new onset of neurological symptoms should alert the physician to central nervous system involvement, and the appropriate, targeted diagnostic and therapeutic work-up should be established immediately. Targeted staining with specific antibodies is recommended. Recent studies on cell lines indicate that metformin strongly inhibits epithelial-mesenchymal transition of gastric cancer cells. Therefore, further studies need to be performed on cases positive for epithelial-mesenchymal transition.

Lege Artis Medicinae

[The author’s response to the comment on “Exploratory study of outcomes of blood sample mass examinations by rank correlations”]

Lege Artis Medicinae

[Comment to the article titled “Exploratory study of outcomes of blood sample mass examinations by rank correlations”]

Hypertension and nephrology

[About the care of patients with hyperuricaemia and gout]

[This consensus document is intended to provide guidance for the effective and efficient treatment of asymptomatic individuals with high uric acid levels and gout patients.]