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Clinical Neuroscience

JULY 30, 2012

[Endoscopic, posterior transseptal pituitary surgery - Learning curve of the surgical technique and equipment in 61 operations]

BELLA Zsolt, FÜLÖP Béla, CSAJBÓK Éva, MAGONY Sándor, VALKUSZ Zsuzsa, HERCZEGH Szilvia, JÓRI József, BODOSI Mihály, CZIGNER Jenő, BARZÓ Pál

[Introduction - The removal of hypophyseal tumor by transsphenoidal pituitary surgery using microsurgical instruments was first performed over 100 years ago. Operating techniques for this surgery are constantly being renewed, first by using a microscope and later on with the use of an endoscop. The authors provide an overview of the minimal invasive posterior transseptal-transsphenoidal aproach with the combined utilization of classical techniques with the assistance of the endoscop. Method - Sixty-one patients (33 female, 28 male, 21-84 yrs) were treated for sellar region tumor resection using an endonasal transsphenoidal aproach with the help of an endoscop. Follow ups were performed within 2-21 months. Results - Total tumor resection was successful in 91.8%, and partial resection in 8.2% of the patients. The rate of complications using the endoscop method was not higher compared to that of the classical microscopic method. There was no major bleeding in any of the cases. Adverse events such as minor epistaxis occurred in 4.9%, transitional diabetes insipidus in 6.5%, inraoperative CSF leak in 16.67%, postoperative CSF leak in 11.5% and meningitis in 8.2% of the patients. After the operation the pathological hormonal production stoped in all patients except in two patients who were acromegalic. However their GH level normalized and they did not require further treatment, the IGF-1 still remained high. Conclusion - The success of the surgical treatment is based on both, the proficient pre- and postoperative endocrinological care, and the minimal invasive surgical technique. The endoscop was used partially or continuously during the operation for better visualization of the operation field in multiple angles (30°, 45°). It was useful in differentiating between normal and tumorous glandular tissue, and also offered an enhanced view of the intrasellar (via hydroscopy) and parasellar region. Moreover the endoscopic method is able to decrease the operating time, reduce blood loss. In different stages of the surgery, depending on the anatomical and pathological situation, switching back and forth from microscope to endoscop technique, gives us the benefit of a clearer view in each situation.]

Ca&Bone

FEBRUARY 14, 2007

[The increase of fracture risk in type 1 and type 2 diabetes mellitus]

HULLÓ DANIELLA

[Studies in the last couple of years found more and more convincing evidence about the fact that impaired glucose metabolism leads to structural changes in the skeletal system leading toward osteoporosis. While patients with type 1 diabetes mellitus have decreased bone density, measurement showed increased bone mineral density in patients with type 2 diabetes mellitus. Despite these differences, risk of vertebral and nonvertebral fractures is increased in both groups of diabetic patients. Decreased pancreatic beta cell function is accompanied by several hormonal disturbances leading to decreased bone formation even in the early stage of diabetes. Peak bone mass of diabetic children is lower than found in nondiabetic children. Late complications of diabetes, vascular and neuronal impairments, impaired renal function, and secondary hormonal disturbances are added to this process. IGF-1 may have a crucial role in the pathogenesis of osteoporosis in diabetes. The structure of the molecule is similar to insulin. IGF-1 has effect on normal bone formation, inhibits the apoptosis and interferes with several other metabolic pathways. IGF-1 mediates the effect of growth hormone to the muscular and skeletal system. IGF-1 level decreases with age, and lower level of IGF-1 is found in diabetic patients. Long term complications of diabetes can also occur, which may enhance the process of bone resorption. Although the evidence is growing that fracture risk is higher in diabetic patiens, there are still scientists who question the association between the two disorders.]

Lege Artis Medicinae

NOVEMBER 21, 2004

[THE ROLE OF ORAL ANTIDIABETIC AGENTS AND ACE INHIBITORS IN THE PREVENTION OF TYPE 2 DIABETES MELLITUS]

KEMPLER Péter

[Nowadays Type 2 diabetes is considered as a cardiovascular disease,. The cause of death among 80% of people with Type 2 diabetes is of cardiovascular origin, with the most common cause of death of myocardial infarction. Optimal solution would be the prevention of the disease and there are also some possibilities for intervention. The present paper summarises the role of antidiabetic agents and ACE inhibitors in the prevention of Type 2 diabetes mellitus. The incidence rate of Type 2 diabetes decreased by 36% using acarbose in the STOP NIDDM Trial and by 31% using metformin in the Diabetes Prevention Program. The rate of risk reduction regarding the incidence of Type 2 diabetes during the ALLHAT Study compared the subjects treated with thiazid diuretics among those treated with amlodipine was 25% by the end of the second year and 16% by the end of the fourth year, while the corresponding data for patients treated with lisinopril were 40% and 30%, respectively. The action of lisinopril on the better bioavailability of Insulin like growth factor I. (IGF-I) probably contributes to the beneficial effect of lisinopril on insulin sensitivity.]

Lege Artis Medicinae

NOVEMBER 20, 2009

[Diabetes mellitus and cancer risk]

BECHER Péter, PATAI Árpád, MÁJER Katalin

[In the past decades, the prevention of micro- and macrovascular complications has been the main target of diabetes treatment. On the basis of the latest publications that have created a storm we have to highlight the associations between diabetes mellitus, its treatment protocols and tumours. Analysing the often controversial human results, in the absence of relevant prospective studies, we have to consider preclinical observations to choose a safe treatment method.]