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Clinical Neuroscience

NOVEMBER 30, 2020

Risk factors related to intracranial infections after transsphenoidal pituitary adenomectomy under endoscope

YIFAN Xu, YUXIN He, WU Xu, TIANYU Lu, WEIBANG Liang, WEI Jin

Background – Up to now, the risk factors related to intracranial infections after transsphenoidal pituitary adenomectomy remain controversial. Purpose – To analyze the risk factors related to intracranial infections after transsphenoidal pituitary adenomectomy under an endoscope, and to provide evidence for preventing and controlling the occurrence and development of infections. A total of 370 patients receiving endoscopic transsphenoidal pituitary adenomectomy in our hospital from January 2014 to October 2017 were selected. The risk factors related to postoperative intracranial infections were analyzed. The hospitalization lengths and expenditures of patients with and without intracranial infections were compared. Of the 370 patients, 18 underwent postoperative intracranial infections, with the infection rate of 4.86%. Intraoperative blood loss >120 mL, cerebrospinal leakage, diabetes, preoperative use of hormones, macroadenoma as well as surgical time >4 h all significantly increased the infection rate (P<0.05). Preoperative use of antibacterial agents prevented intracranial infection. Compared with patients without intracranial infections, the infected ones had significantly prolonged hospitalization length and increased expenditure (P<0.05). Discussion – It is of great clinical significance to analyze the risk factors related to intracranial infection after endoscopic transsphenoidal pituitary adenomectomy, aiming to prevent and to control the onset and progression of infection. Intracranial infections after endoscopic transsphenoidal pituitary adenomectomy were affected by many risk factors, also influencing the prognosis of patients and the economic burden.

Clinical Neuroscience

MARCH 30, 2016

[Endoscopic removal of tuberculum sellae meningeoma through endonasal transsphenoidal approach]

FÜLÖP Béla, BELLA Zsolt, PALÁGYI Péter, BARZÓ Pál

[Experiences acquired in our department with endoscope assisted microsurgical transsphenoidal pituitary surgery encouraged us to expanded the endoscopic approach to skull base lesions. The endoscopic endonasal transsphenoidal approach proved to be less traumatic to the traditional microsurgical approaches, yet very effective. The endoscopic transsphenoidal technique was applied in a patient havin anterior skull base tumor. The patient was a 49-year-old woman with several months history of left visual defect. The magnetic resonance (MR) scans of the skull revealed a midline anterior fossa space-occupying lesion measuring 21×16×22 mm located on planum sphenoidale, tuberculum sellae and intrasellar. The tumor compressed both optic nerves and optic chiasm. Total resection of the tumor was achieved by use of endoscopic transnasal, transsphenoidal technique. This is the first reported case of an anterior fossa meningeoma being treated by an endoscopic transsphenoidal technique in Hungary.]

Lege Artis Medicinae

DECEMBER 10, 2018

[Experimental investigation of the complex energy balance]

GARAMI András

[The complex energy balance includes maintenance of both normal body mass and body temperature. In the homeostasis regulation it is important that the activities of several physiologic processes are balanced with each other, for example, the balance between food intake and energy expenditure is crucial to maintain normal body mass, while the balance between heat production and heat loss is vital in determining body temperature. Obesity and loss of body weight, as well as fever and hypothermia are consequences of the dysregulation in energy balance. In our research, we studied receptorial and neurohumoral mechanisms involved in the maintenance and in the impairment of energy balance. This paper gives an overview of our most important findings, which served as the basis of the application submitted to and awarded with 3rd prize by the Prof. Dr. Laszlo Romics Memorial Foundation. We review the physiologic role of transient receptor potential channels, mostly of vanilloid-1 (formerly: capsaicin receptor) in the regulation of body temperature and body mass. Among the neuropeptides which take part in the maintenance of energy balance, we present the thermoregulatory effects of alpha-melanocyte stimulating hormone and pituitary adenylate cyclase-activating polypeptide. Last, among the molecular mechanisms of systemic inflammation, which is characterized by thermoregulation disorders (e.g., fever, hypothermia), we recap the role of the vanilloid-1 and neurokinin-1 receptor, and bilirubin.]

Clinical Neuroscience

SEPTEMBER 30, 2017

A case of secondary SUNCT syndrome

GUL Gunay, KANDEMIR Melek, KARA Batuhan, SAKALLI Karagoz Nazan, EREN Sengul Fulya

SUNCT syndrome, a rare form of primary headaches, may be secondary to pituitary tumours. The secondary forms usually related with prolactinomas. The response of dopamin agonists could be variable. In this study, we reported a case of SUNCT syndrome secondary to prolactinoma. Cranial magnetic resonance imaging was performed for this patient because of the increase in pain severity and frequency. A hemorrhage was detected into the prolactinoma ipsilateral to the pain. The headache attacks were taken undercontrol and remission was ensured with cabergoline in a short time.

Clinical Neuroscience

SEPTEMBER 30, 2016

Stress-induced corticosterone rise maintain gastric mucosal integrity in rats

LUDMILA Filaretova, MARINA Myazina, TATIANA Bagaeva

Background - To investigate contribution of glucocorticoids to the maintenance of gastric mucosal integrity during stress we predominantly used ulcerogenic stress models. Using these models we demonstrated that glucocorticoids released in response to the ulcerogenic stimuli attenuated their harmful action on the gastric mucosa. Purpose - In the present study we hypothesized that mild stressors does not damage the gastric mucosa due to gastroprotective action of glucocorticoids released in response to these stressors. Methods - To verify the hypothesis the effects of normally non-ulcerogenic mild stimuli (15-30 min cold-restraint) on the gastric mucosal integrity have been studied under the circumstances of inhibition of the hypothalamic-pituitaryadrenocortical axis in rats. The hypothalamic-pituitary-adrenocortical axis was inhibited by: 1) fast inhibitory action of metyrapone, inhibitor glucocorticoid synthesis; 2) fast inhibitory action of NBI 27914, the selective antagonist of cortricotropin- releasing factor receptor type 1; 3) delayed inhibitory action of a single pharmacological dose of cortisol injected one week before the onset of stress stimulus. Results - Each of these pretreatments significantly decreased 15-30 min cold-restraint-produced corticosterone levels: 37.2±1 vs 22.5±1.2 (p<0.05) after metyrapone; 52.1±0.9 vs 41.4±1 (p<0.05) after NBI, and 64.2±4.2 vs 16.7±1.5 (p<0.05) after cortisol pretreatment. The inhibition of stress-induced corticosterone rise resulted in an ap - pearance of gastric lesions after the onset of these mild stressors in rats. Conclusions - The results suggest that in rats with inhibited stress-induced corticosterone rise normally non-ulcerogenic stimuli are transformed into ulcerogenic ones and confirm the hypothesis. The findings further support for the point of view that glucocorticoids released during acute stress are gastroprotective factors.

Lege Artis Medicinae

NOVEMBER 03, 2015

[Sudden death of a patient with purpura - post mortem recognized eosinophilic granulomatosis with polyangiitis]

DOBREAN Noémi, HAJNAL-PAPP Rozália, TUSA Magdolna, OROJÁN Iván, CSERNI Gábor

[INTRODUCTION - Systemic diseases may sometimes be challenging because physicians do not think about synthesizing the parts to a single entity. CASE REPORT - A 49-year-old asthmatic female was admitted to hospital for the investigation of her cutaneous symptoms suggestive of vasculitis associated with diffuse joint complaints. The chest X-ray raised the possibility of pneumonia or neoplastic disease. Following an episode of chest pain relieved by a non-steroidal anti-inflammatory drug, she suddenly died. Her previous history included restrictive cardiomyopathy, insufficiency of both atrioventricular valves and long dating eosinophilia. Autopsy revealed a partly granulomatous eosinophilic inflammatory process in several organs, including the heart, the lungs, the kidneys, the colon and the pituitary gland. Retrospective collection of unknown anamnestic features and symptoms made possible to unify the pieces of information and symptoms to a single entity, the Churg-Strauss syndrome (eosinophilic granulomatosis with polyangiitis, EGPA). CONCLUSIONS - Bronchial asthma seldom leads to death. It can rarely be part of the Churg-Strauss syndrome, of which the manifestation may be related to the administration of leukotriene antagonists also used in the presented case. These drugs may allow the withdrawal of systemic steroid therapy which is beneficial not only in the treatment of asthma but also of the syndrome. Lowering the dose of steroids may promote the development of the full blown pattern of the latter.]

Lege Artis Medicinae

DECEMBER 20, 2014

[The complexity of hyper-lipidaemia’s follow-up in a polymorbid patient diagnosed with newfound Parkinson’s disease]

HANG Dóra

[The 73-year-old polymorbid man has been examined because of above normal blood pressure and increased serum lipid levels. From his already known diseases subclinic hypothyreosis should be highlighted. Because of increased serum cholesterol (6.7 mmol/l) and LDL levels (4.91 mmol/l) 40 mg atorvastatin has been adjusted besides 10 mg amlodipine against his high blood pressure. Subsequently selegiline and levodopa/benserazid therapy have been adjusted caused by newly diagnosed Parkinson’s disease. Parallel in time decreased dosage of atorvastatin (20 milli- gramms) has been enabled to adjust as well, the pill taken by the patient is combinated with 10 milligramms of amlodipine and called Amlator®. The improvement of lipid levels might be due to the trasformation of subclinic hypothyroidism to euthyroid state of the thyroid gland. Levodopa might plays role in this improvement resulting in an inhibition of TSH release because of demonstrated dopamine-receptors in the pituitary gland.]

Clinical Neuroscience

MARCH 30, 2014

[HANS SELYE AND THE STRESS RESPONSE: FROM “THE FIRST MEDIATOR” TO THE IDENTIFICATION OF THE HYPOTHALAMIC CORTICOTROPIN-RELEASING FACTOR]

TACHÉ Yvette

[Selye pioneered the stress concept that is ingrained in the vocabulary of daily life. This was originally build on experimental observations that divers noxious agents can trigger a similar triad of endocrine (adrenal enlargement), immune (involution of thymus) and gut (gastric erosion formation) responses as reported in a letter to Nature in 1936. Subsequently, he articulated the underlying mechanisms and hypothesized the existence of a “first mediator” in the hypothalamus able to orchestrate this bodily changes. However he took two generations to identify this mediator. The Nobel Laureate, Roger Guillemin, a former Selye’s PhD student, demonstrated in 1955 the existence of a hypothalamic factor that elicited adrenocorticotropic hormone release from the rat pituitary and named it corticotropin releasing factor (CRF). In 1981, Wylie Vale, a former Guillemin’s Ph Student, characterized CRF as 41 amino acid and cloned the CRF1 and CRF2 receptors. This paves the way to experimental studies establishing that the activation of the CRF signaling pathways in the brain plays a key role in mediating the stress-related endocrine, behavioral, autonomic and visceral responses. The unraveling of the biochemical coding of stress is rooted in Selye legacy continues to have increasing impact on the scientific community.]

Clinical Neuroscience

MARCH 30, 2014

[STRESS IN THE CLASSIFICATION OF PITUITARY TUMORS. FOCUS ON AGGRESSIVE PITUITARY ADENOMAS]

KOVÁCS Kálmán, ROTONDO Fabio, HORVÁTH Éva, SYRO V Luis

[After a brief summary of the stress concept and the contribution of Dr. Hans Selye, this publication focuses on the classification of pituitary neoplasms and the difficulties to provide conclusive information on the prognosis of various pituitary tumor types. The term “aggressive pituitary tumors” was introduced. These tumors have a rapid cell proliferation rate. At present, the assessment of Ki-67 nuclear labeling index appears to be the simplest and most reliable method to evaluate tumor cell multiplication. Further studies on pituitary tumor biomarkers are needed.]

Clinical Neuroscience

MARCH 30, 2014

[CENTRAL NEUROENDOCRINE MECHANISMS OF GASTROPROTECTION]

GYIRES Klára

[Selye recognized the importance of activation of hypothalamic- pituitary-adrenal axis during stress and the connection between central nervous system and neuroendocrine regulation. This concept basically contributed to initiation of the studies, which revealed the importance of brain gut axis in regulation of gastric mucosal integrity. Several neuropeptides, such as thyreotrop releasing hormones, adrenomedullin, peptide YY, amylin, opioid peptides, nociceptin, nocisatin, substance P, ghrelin, leptin, orexin-A, angiotensin II were shown to induce gastroprotective effect injected centrally. Though the involvement of dorsal vagal complex and vagal nerves in conveying the central action to the periphery has been well documented, additional mechanisms have also been raised. The interaction between neuropeptides further component that may modify the gastric mucosal resistance to noxious stimulus.]