Lege Artis Medicinae

[Transvaginal ultrasound examination of embryo development in early pregnancy (sono-embryology) II. central nervous system]

CSABAY László1, SZABÓ István1, NÉMET János1, PAPP Zoltán1

JUNE 30, 1992

Lege Artis Medicinae - 1992;2(06)

[In the second part of their paper, the authors look over the most important phases of the development of the central nervous system during the first trimester of pregnancy - especially considering the stages, which can be differentiated with a high resolution transvaginal transducer. The closed neural tube is developing at days 40 to 44 by the closure of the posterior neuropore, however at this time no brain structures can be detected by ultrasound. During the 7th week the three primary brain vesicles (prosencephalon, metencepha lon, myelencephalon) can be identified – a single ventricle can be seen by ultrasound. During the 8th week the secondary brain vesicles (telencephalon, diencephalon, mesencephalon, metencephalon, myelencephalon) can be separated. During the 9th week the lateral ventricles are filled out by the choroid plexus, which are retracted to the occipital horn by the 13th week. The appearance of the brain structures also takes place according to an accurate „calendar". The structures recognized by ultrasound can be compared to those of the central nervous system known from embryology. The problem of the primary prevention of the cerebrospinal malformations, which are among the most frequent congenital disorders, is not yet solved; therefore the early prenatal diagnosis of the structural anomalies has great importance. ]


  1. Semmelweis Orvostudományi Egyetem I. Szülészeti és Nőgyógyászati Klinika



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Lege Artis Medicinae

[Immunological aspects of granuloma formation]

DANKÓ Katalin, SZEGEDI Gyula

[The process of inflammation can be classified as acute, subacute and chronic, as well as the special category of granulomatous inflammation. Classification of granulomatous inflammation based on morphologic criteria. These are epitheloid, histiocytic, foreign-body, necrobiotic and mixed inflammatory granuloma. The current knowledge suggests the following sequences for the mechanisms of granuloma formation in sarcoidosis (Fig 2): 1. T-cells are locally activated and proliferating 2. These activated T-cells release lymphokines that recruit and activate monocytes/macrophages 3. These activated monocytes/macrophages may differentiate into granuloma cells such as epithelioids cells and multinucleated giant cells and release pro-inflammatory profibrotic mediators that modulate the granulomatous and fibrotic process. It is hoped that further studies in sarcoidosis will help not only in clarifying the pathogenic mechanisms leading to granuloma formation, but also in eventually revealing the etiology of sarcoidosis. ]

Lege Artis Medicinae

[Laparoscopic varicocelectomy]

HOLMAN Endre, TÓTH Csaba, PÁSZTOR Imre, FICSÓR Ervin, PAPP Ferenc

[ With the spreading use of the laparoscope in the urological surgery laparoscopic varicocelectomy may become an alternative treatment of varicocele. The method can be advantageous mainly for patients with bilateral cases compared to the open operation. The authors report on two cases that have been the first urological laparoscopic operations in Hungary.]

Lege Artis Medicinae

[Vascular surgical aspects of small bowel ischaemia]

DÓBI István

[A brief account is given of acute and chronic diseases underlying the disorders of blood supply to the small bowel. In cases of acute disorders, considering the diagnostic difficulties involved, the author stresses the importance of commencing of a vasodilatator treatment immediately after the tentative diagnosis has been reached based on the first suspicious symptomes, and also requiring angiography to render the accurate diagnosis. This is the only possibility to increase (without irreversible tissue damages) the number of successful early vascular reconstructions which are the prerequisites to reducing in lethality. Finally, based on his own extensive experimental work, the author proposes to make allowances for the augmented local postischaemic vasoconstrictor trends of vascular reactivity in the complex therapeutic regimen of these diseases. ]

Lege Artis Medicinae

[Cardiovascular effects of sleep-related breathing disorders, a review]

VÁRDI Visy Katalin

[The acute and chronic cardiovascular effects of sleep related breathing disorders are summarized in this review. Obstructive sleep apnoea syndrome is characterized by recurrent upper airway collapse during inspiration. The resulting asphyxia causes hypoxia and arousal. The vigorous inspiratory efforts produce falls in blood pressure coinciding with each effort (pulsus paradoxus). A rise in blood pressure is seen concurrently with each termination of apnoea and arousal. Bradycardia induced by hypoxia in each obstructive period and increased frequency at time of arousals could lead to arrhythmias. This may result in a high prevalence of hypertension, acute myocardial infarction and arrhythmias in sufferers of obstructive sleep apnoea syndrome have. ]

Lege Artis Medicinae

[Evaluation of one hundered cancer cases in the practice of a general practicioner]

KISS László

[The author, working as a general practicioner in Czecho-Slovakia, gives an analysis of one hundred malignant tumour patients. In 31 cases the tumours have been in favourable position, and it would have been possible to set up early diagnosis in the general practice. The early diagnosis has actually happened only in 15 cases. The tumor has been verified at an advenced stage in 16 cases (2 of them have been inoperable). Delay has occured in two cases because of the nature of the cancer; in one case the general practicioner and in two ones the specialist missed the diagnosis; in the rest of the cases (11) the patient appeared too late. The author expresses that development in early cancer diagnosis is based on effective health education beyond the permanent on cological vigilance. ]

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REISZ Zita, GÁL Péter, TAJTI Zsanett, TERHES Gabriella, URBÁN Edit, KISS Ildikó, BARZÓ Pál, KIS Dávid, SENONER Zsuzsanna, SZABÓ Nóra, SZAPPANOS Norbert, TISZLAVICZ László

[INTRODUCTION - Central nervous system complications occur in 1% of patients with Mycobacterium tuberculosis infection, but the mortality is very high, about 50 percent. CASE REPORT - A 1-year-old child in tenebrous condition was admitted to the hospital with suspicion of meningitis. MRI detected disseminated encephalitis and dilated ventricles. Examination of the serum and cerebrospinal fluid didn’t bring any results. The microscopic examination of the brain biopsy raised the possibility of tuberculous meningoencephalitis, and the culture and PCR from the brain tissue revealed meningoencephalitis caused by Mycobacterium tuberculosis Beijing. DISCUSSION - Tuberculous meningitis is a very rare, but severe consequence of extrapulmonary tuberculosis. Due to the high mortality, early diagnosis and whenever suspected, the use of empiric antituberculotic therapy are the only chances of recovery.]

Lege Artis Medicinae

[Central nervous system hemorrhage in Wegener’s granulomatosis]

SZABOLCSI Orsolya, SZÁNTÓ Antónia, ZEHER Margit

[In our case a 41-year-old man with following symptoms: non-productive coughing, fever, difficulty in breathing and weight loss was examined in February 2007, and on the basis of chest X-ray, CT and bronchoscopy, the possibility of neoplasm or tuberculosis cropped up. After the applied therapy (steroid, antibiotics, tuberculostatic drugs) the symptoms became more severe, i.e. hematuria and epistaxis were manifested. A tissue biopsy was carried out during bronchoscopy and the histological examination revealed granulomatous reaction. Meanwhile, the presence of c-ANCA was proved, and Wegener’s granulomatosis (WG) was diagnosed. In March 2007, sudden somnolence and left side hemiplegia developed, and a large haemorrhage was recognised on CT scan in the right fronto-temporal region, with regard to the haemorrhage, the patient had to undergo a neurosurgical operation. We started to treat him in April 2007 by intravenous steroid and 600 mg of cyclophosphamide (Cyc), and he regained the ability to walk again. In October 2007, the Cyc treatment was terminated, and we administered a maintenance therapy with methotrexat. During the regular medical check-up, a chest X-ray indicated a second attack in March 2008, which was confirmed by the chest CT, the clinical symptoms, increased anti-PR3 levels and c-ANCA positivity as well. The flair of the disease was established. Consequently, in April 2008 we decided on plasmapheresis therapy synchronised with Cyc. After that, we started an azathioprine maintenance therapy and he got rid of all the activation symptoms. We can say that with the adequate therapy started in good time and with the regular medical check up of the patient a good result can be achieved. It is true even in the case of WG disease associated by severe complication, for example central nervous hemorrhage.]

Lege Artis Medicinae


NAGY Judit, KISS István

[Erythropoietin produced by the foetal liver and the adult kidney is the major stimulator of erythropoiesis. Erythropoietin production is regulated by hypoxic activation of erythropoietin gene transcription. Recently, new sites of erythropoietin production have been found mainly in the central nervous system and in the cardiovascular system. These tissues have a paracrine and/or autocrine system of erythopoietin. The pleiotropic function of erythropoietin in these systems is tissue and cell protection by several mechanisms including inhibition of apoptosis, attenuation of ischaemic or reperfusion injury, anti-inflammatory and antioxidative effects. Furthermore, it promotes vascular recovery and enhances neoangiogenesis. In vivo and in vitro studies have proved that systemically administered human erythropoietin can also provide tissue protection. However, adverse effects of erythropoietin treatment such as hypertension, hyperviscosity and thrombosis may override the beneficial effect of systemic erythropoietin treatment. There are preliminary data that erythropoietin analogues, e.g., asyaloerythropoietin or carbamylated erythropoietin can provide tissue protection without stimulating erythropoiesis.]

Clinical Neuroscience

[Fingolimod therapy in multiple sclerosis - the issue of the pathomechanism]

TAR Lilla, VÉCSEI László

[Multiple sclerosis is an autoimmune inflammatory disease of the central nervous system with neurodegenerative chararacteristics. The newly discovered per os administrable drug fingolimod (FTY720) has a different mechanism of action than the current disease-modifying therapies. In vivo the drug binds to four out of the five sphingosine-1-phosphate receptors after phosphorylation. Fingolimod-phosphate (FTY720-P) causes internalization and degradation of the sphingosine-1-phosphate receptors in the membrane of lymphocytes thus in contrast to sphingosine-1-phosphate it acts like a functional antagonist. In experimental autoimmune encephalomyelitis - an animal model of multiple sclerosis - fingolimod blocks the sphingosine-1-phosphate gradient controlled lymphocyte egress from the lymph nodes and therefore reduces the peripheral lymphocyte count especially the encephalitogenic Th17 subset is reduced. Modulation of the sinus lining and blood-brainbarrier constructing endothelial cells also contributes to the complex mechanism of action. Additionally due to its liphohilic nature fingolimod is able to penetrate the blood brain barrier thus, beside its peripheral effects the drug can probably modulate the cells of the central nervous system directly. Presumably it can reduce neurodegeneration caused by astrogliosis through modification of astrocyte and oligodendrocyte activity. The results of current clinical studies are holding out with bright prospective in the aspect of either the favourable effects or the well tolerated side effects.]

Clinical Neuroscience



[Even tough the central nervous system (CNS) of gastropods has long been used as a model for studying different neuronal networks underlying behaviors, there is only little information on the molecular components of the extracellular matrix (ECM) of the nervous tissue. Therefore, the aim of the present study was to identify some of the ECM molecules by acid-base histochemistry. Staining with alcian blue at strong acidic pH, and with acridine orange at different pH and salt concentrations was carried out on cryostat sections taken from CNS preparations of adult specimens of the terrestrial snail, Helix pomatia, and the aquatic species, Lymnaea stagnalis, in order to visualize mild (carboxyl) and strong (sulphate) acidic groups, which are characteristic for different glucosaminoglycans. According to our findings, sulphated proteoglycans were abundant in the periganglionic sheath of both species, and they also occurred in the neuropil of Helix, whereas they were absent in Lymnaea. The interperikaryonal space contained mainly carboxyl residues, which might refer to the presence of hyaluronic acid. It is concluded that the ECM of the snail CNS, similarly to that in vertebrates, is partly composed of polymer macromolecules of different chemical properties. It is suggested that adaptation to environmental conditions and/or altered neuronal plasticity are responsible for the differences found in chemical characters of the ECM molecules between the two snail species.]