References of "Stevenaert, Achille"
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See detailAn epidemiological survey of 783 patients who underwent pituitary surgery in a single Centre over a 25-year periods
Beckers, Albert ULg; Petrossians, Patrick ULg; Stevenaert, Achille ULg

in 24th International Symposium on GH and growth factors in Endocrinology and Metabolism - Abstract book (1997)

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See detailSomatostatini SSTR2 and dopamine D2 receptors gene expression in Growth hormone-producing pituitary adenomas
Ronci, N.; Tabarin, A.; Beckers, Albert ULg et al

in 78th Endocrine Society Annual Meeting - Abstract book (1997)

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See detailExpression des récepteurs somatostatinergiques SSTR2 et dopaminergiques D2 dans les adénomes somatotropes
Tabarin, A.; Ronci, N.; Carrié, F. et al

in Annales d'Endocrinologie (1997), 58(2),

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See detailSomatostatin SSTR2 and Dopamine D2 receptors gene expression in Growth Hormone-producing pituitary adenomas
Ronci, N.; Tabarin, A.; Beckers, Albert ULg et al

in Annales d'Endocrinologie (1997), 58(1),

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See detailThe Burden of Hypopituitarism in Adults after Pituitary Surgery
Van Roijen, L.; Beckers, Albert ULg; Stevenaert, Achille ULg et al

in Journal of Clinical Endocrinology and Metabolism (1997), 4(Suppl. B), 139-142

The burden of illness was assessed in 183 hypopituitary patients, with growth hormone deficiency, who had received pituitary surgery at the Centre Hospitalier Universitaire de Liège, Belgium. The Short ... [more ▼]

The burden of illness was assessed in 183 hypopituitary patients, with growth hormone deficiency, who had received pituitary surgery at the Centre Hospitalier Universitaire de Liège, Belgium. The Short-Form 36 (SF-36) was used to assess health status, and the Health and Labour Questionnaire was used to obtain data on production loss and reduced labout performance. Data on medical consumption were also collected. The overall response rate was 72 %. Hypopituitary patients reported a lower health status than that of the mean population in all but two dimensions of the SF-36 (bodily pain and physical functioning). A relativelu high percentage of hypopituitary patients reported being incapacitated for paid employment, and those in paid employment reported higher absence rates compared with reference data. However, while at work there was no indication that hypopituitary patients perform less well due to health problems than the average population. Healthcare costs for hypopituitary patients who had undergone pituitary surgery were higher than for the reference population. [less ▲]

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See detail125I-Tyr0-hCRH labelling characteristics of corticotropin-releasing hormone receptors: differences between normal and adenomatous corticotrophs.
Abs, R.; Smets, G.; Vauquelin, G. et al

in Neurochemistry International (1997), 30(3), 291-297

The presence of corticotropin-releasing hormone (CRH) receptors has been previously demonstrated in corticotrophs from normal pituitaries using a method combining immunocytochemistry and liquid emulsion ... [more ▼]

The presence of corticotropin-releasing hormone (CRH) receptors has been previously demonstrated in corticotrophs from normal pituitaries using a method combining immunocytochemistry and liquid emulsion autoradiography. The aim of this study was to compare the characteristics of the 125I-Tyr0-hCRH binding in corticotrophs from normal pituitaries (three obtained at autopsy and one obtained at surgery) with corticotrophs from pituitary adenomas (six corticotroph adenomas responsible for Cushing's disease and two silent corticotroph adenomas secreting a biologically inactive ACTH molecule). In normal corticotrophs, the larger part of the 125I-Tyr0-hCRH binding was localised in patchy conglomerates at the centre of the cell and, to a much lesser degree, in a diffuse pattern at the cell periphery. In adenomatous corticotrophs, CRH receptor expression is disturbed both quantitatively and qualitatively. Except for a minority of cells in one adenoma, all adenomatous corticotrophs showed only peripherally bound 125I-Tyr0-hCRH and no centrally localised binding. Furthermore, adenomatous corticotrophs revealed a statistically significant lower signal intensity when compared to normal corticotrophs and a strongly negative correlation was found between the labelling area in adenomatous corticotrophs and both the basal and CRH-stimulated plasma ACTH levels. These findings suggest defective processing of CRH receptors and could be relevant to the sustained ACTH secretion by adenomatous corticotrophs in Cushing's disease and, more generally, provide an explanation to its pathology. The silent corticotrophs secreting a biologically inactive ACTH molecule were characterised by a very faint signal intensity, although present on almost every cell. [less ▲]

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See detailEffects of Schwann Cell Transplantation in a Contusion Model of Rat Spinal Cord Injury
Martin, Didier ULg; Robe, Pierre ULg; Franzen, Rachelle ULg et al

in Journal of Neuroscience Research (1996), 45(5), 588-597

Cultured Schwann cells were transplanted at various delays into a spinal cord contusion injury performed at low thoracic level in adult female rats. The Schwann cells were purified from the dorsal root ... [more ▼]

Cultured Schwann cells were transplanted at various delays into a spinal cord contusion injury performed at low thoracic level in adult female rats. The Schwann cells were purified from the dorsal root ganglia of adult syngeneic animals. the transplants were well tolerated, and the transplanted Schwann cells invaded the injured spinal cord. As quantified using video image analysis, the survival and growth of the transplanted cells were poor when the grafting procedure was performed 3-4 days after injury and very good when performed immediately or 10 days after injury, in which cases post-traumatic micro- and macrocavitation were strongly reduced. In animals grafted immediately after injury but not in animals grafted after 10 days, post-traumatic astrogliosis was much reduced. The Schwann cells transplanted area was invaded by numerous regenerating axons, the vast majority of which were, based on the neurotransmitter (CGRP and SP) profile, originating from dorsal root ganglion. No regeneration of the corticospinal tract as assessed after anterograde tracing or of descending aminergic fibers could be demonstrated. [less ▲]

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See detailPresurgical Octreotide: Treatment in Acromegaly
Stevenaert, Achille ULg; Beckers, Albert ULg

in Metabolism : Clinical and Experimental (1996), 45(8 Suppl. 1), 72-4

One hundred seventy-two acromegalics who were operated on using the trans-sphenoidal approach underwent long-term follow-up evaluation. Sixty-four received 100 micrograms octreotide subcutaneously three ... [more ▼]

One hundred seventy-two acromegalics who were operated on using the trans-sphenoidal approach underwent long-term follow-up evaluation. Sixty-four received 100 micrograms octreotide subcutaneously three times daily: for 3 to 6 weeks before surgery in 14 patients (group 1); and for 3 to 9 months in 41 and for 13 to 39 months in nine (n = 50, group 2). In 18 group 2 patients, the dose was increased stepwise to 500 micrograms three times daily because of incomplete suppression of growth hormone (GH)/insulin-like growth factor-1 (IGF-1). Tumor shrinkage was seen in 60% within 3 weeks, being nearly maximal by 3 to 4 months. More group 2 patients had greater than 25% tumor shrinkage (14 of 48 v 1 of 14 in group 1). Clinical response was excellent or good in 89%. Decrease in soft-tissue swelling and weight loss, and improved vitality, performance, carbohydrate metabolism, and cardiovascular function, facilitated anesthetic and surgical management; tumor removal was easy in virtually all cases. In all 64 patients, GH levels decreased by > or = 50%, and to < 2 micrograms/L in three of 14 patients initially and 25 of 50 patients after more prolonged treatment. IGF-1 levels decreased to normal in seven of 14 group 1 and 31 of 50 group 2 patients. Light and electron microscopy showed that adenomatous tissue exposed to octreotide had lysosomal accumulation, amyloid deposition, mild to moderate perivascular fibrosis, and moderate size reduction in both cytoplasmic and nuclear areas, with virtually no cellular complications. Remission with enclosed adenomas was greater (p < .05) than for the 108 patients not treated with octreotide; there was no difference for invasive adenomas. Octreotide use for 3 to 4 months before surgery can be recommended. [less ▲]

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See detailLes hernies discales dorsales : a propos de 7 cas opérés
Dubuisson, Annie ULg; Lenelle, Jacques ULg; Martin, Didier ULg et al

Conference (1996, March 16)

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See detailLes adénomes gonadotropes
Beckers, Albert ULg; Stevenaert, Achille ULg

in Revue Française d'Endocrinologie Clinique, Nutrition, et Métabolisme (La) (1996), 37(4-5), 299-305

Les adénomes hypophysaires gonadotropes qui sont parmi les plus fréquents, ont été identifiés récemment; on estime aujourd'hui qu'environ 80 % des adénomes hypophysaires dits non-sécrétants sont en fait ... [more ▼]

Les adénomes hypophysaires gonadotropes qui sont parmi les plus fréquents, ont été identifiés récemment; on estime aujourd'hui qu'environ 80 % des adénomes hypophysaires dits non-sécrétants sont en fait gonadotropes. Étant donné l'absente de symptomatologie spécifique, ils ne sont souvent reconnus que lorsqu'ils sont volumineux, ayant déjà entraîné un syndrome neurologique, une compression du chiasma optique. Dans la plupart des cas il est possible de les identifier grâce aux produits de sécrétion ou encore par méthodes d'immunohistochimie ou encore par la détection de l'ARN messager correspondant aux sous-unités hormonales. Le traitement reste essentiellement neuro-chirurgical (chirurgie trans-sphénoidale) car, dans la plupart des cas, les agonistes dopaminergiques et les analogues agonistes ou antagonistes de GnRH sont inefficaces. [less ▲]

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See detailAcromégalie et polypes coliques
Beckers, Albert ULg; Delhougne, B.; Deneux, C. et al

in Beckers, Albert (Ed.) Acromégalie : Les conséquences de l'hypersomatropisme (1996)

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See detailDopamine D2 receptor gene expression in growth hormone-producing pituitary adenomas
Tabarin, A.; Carrié, F.; Ronci, N. et al

in 4th International Pituitary Congress of Endocrinology - Abstract book (1996)

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See detailTwo years or replacement therapy in 148 adults with growth hormone déficiency in Belgium
Verhelst, J.; Abs, R.; Mockel, J. et al

in 10th international Congress of Endocrinology - Abstract book (1996)

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See detailDopamine D2 receptor gene expression in growth hormone-producing pituitary adenomas
Tabarin, A.; Carrie, F.; Beckers, Albert ULg et al

in 10th international Congress of Endocrinology - Abstract book (1996)

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See detailThe treatment of prolactinomas with cabergoline
Beckers, Albert ULg; Louis, O.; Verhelst, J. et al

in 10th international Congress of Endocrinology - Abstract book (1996)

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See detailThe prevalence of colonic polyps in acromegaly : a prospective colonoscopic and pathological study in 103 patients.
Delhougne, B.; Deneux, C.; Abs, R. et al

in Journal of Clinical Endocrinology and Metabolism (1995), 80(11), 3223-3226

Patients with acromegaly are reported to be at risk of developing adenomatous colonic polyps, which are considered to be preneoplastic lesions. This assumption is, however, usually drawn from results ... [more ▼]

Patients with acromegaly are reported to be at risk of developing adenomatous colonic polyps, which are considered to be preneoplastic lesions. This assumption is, however, usually drawn from results obtained in rather small series of patients or without a control group. We, therefore, undertook a prospective colonoscopic and pathological study comprising 103 acromegalic patients and 138 nonacromegalic control subjects referred for irritable bowel syndrome. The prevalence of adenomatous colonic polyps was significantly increased in acromegalic patients compared to that in control subjects (22.3% vs. 8.0%; P = 0.0024). The significance was similarly present in male acromegalic patients (28.6% vs. 5.5% in male control subjects; P = 0.0026), but was absent in female acromegalic patients. The prevalence of colonic polyps was also significantly increased in the group of acromegalic patients under 55 yr of age (20.0% vs. 3.0% in the control group of the same age; P = 0.0026). Other characteristics of adenomatous colonic polyps in acromegaly were the multiplicity and the presence proximal to the splenic flexure. No difference in the duration of acromegaly was found between patients with or without adenomatous polyps. The prevalence of hyperplastic colonic polyps was also significantly increased to 24.3% in acromegalic patients vs 4.4% in control subjects (P < 0.001). In conclusion, in view of the increased incidence of adenomatous colonic polyps, colonoscopy should be part of the follow-up examination in acromegaly. [less ▲]

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See detailFactors influencing the immediate and late outcome of cushing-disease treated by transsphenoidal surgery : A retrospective study by the european cushings-disease survey group
Bochicchio, D.; Losa, M.; Buchfelder, M. et al

in Journal of Clinical Endocrinology and Metabolism (1995), 80(11), 3114-3120

Hypercortisolism attributable to hypersecretion of ACTH by a pituitary adenoma is an uncommon and progressively lethal disease. Because of its rarity, it has been difficult to collect a large series of ... [more ▼]

Hypercortisolism attributable to hypersecretion of ACTH by a pituitary adenoma is an uncommon and progressively lethal disease. Because of its rarity, it has been difficult to collect a large series of patients in order to identify the prognostic factors influencing the outcome after transsphenoidal surgery. We conducted a multicenter, retrospective analysis of the early and late results of surgical treatment of Cushing's disease. Files of patients with Cushing's disease who underwent transsphenoidal surgery between 1975 and 1990 were collected from 25 institutions throughout Europe. Data from 668 of 716 patients were suitable for statistical analyses. Surgical mortality was 1.9%, and major morbidity occurred in 97 patients (14.5%). Clinical and biochemical remission of Cushing's disease after surgery occurred in 510 cases (76.3%). Identification of the tumor by neuroradiological imaging or at operation with histopathological corroboration was associated with remission of hypercortisolism. Recurrence of the disease occurred in 65 (12.7%) of 510 patients in remission after surgery at a mean time of 39.3 months (range 6-104 months). The distribution of the recurrences did not show any apparent plateau or cluster throughout the follow-up period. Low postoperative steroid levels, absence of cortisol response to CRH, and the need for long-term glucocorticoid substitution therapy were all associated with a high probability of long-term remission. Our study demonstrates that transsphenoidal surgery is a safe and effective treatment for patients with Cushing's disease. However, after successful surgery there is a steady increase in the percentage of recurrences, which continues with time. Patients who after operation had hypoadrenocorticism and needed long-term glucocorticoid substitution therapy had the lowest risk of relapse. [less ▲]

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See detail132. Intrasellar arachnoïd cysts: diagnosis and treatment
Dubuisson, Annie ULg; Martin, Didier ULg; Bruggeman, L. et al

Conference (1995, May 07)

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