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  • 1
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Amiodarone-associated thyrotoxicosis, often clinically mild and resolutive after amiodarone discontinuation or under medical therapy, is sometimes drug unresponsive and not uncommonly follows a dramatic, even fatal course. Therefore, we considered a surgical solution in 15 severely amiodarone-associated thyrotoxic patients. Twelve men and three women (mean age 68 years, range 50–84 years) underwent radical thyroidectomy for clinical and biologically proved amiodarone-associated thyrotoxicosis. In six surgery was the first-line therapeutic option. In the other nine thyroidectomy seemed unavoidable considering the unresponsiveness to medical therapy and rapid deterioration of the patients’ clinical condition, with life-threatening cardiac failure in three. In every patient surgery was conducted without immediate or delayed complications. Total thyroidectomy proved uniformly, definitively, and rapidly effective in controlling thyrotoxicosis in all patients, with a spectacular reversal of cardiac failure in the three most critical cases. Surgery was beneficial to our 15 patients and undoubtedly life-saving in the three most worrying cases. These results suggest that thyroidectomy should be more liberally regarded as an interesting alternative to conventional, but unpredictably effective, medical therapies.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 17 (1993), S. 622-626 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'hyperthyroïdie induite par l'amiodarone est généralement modérée et disparaît lors de l'arrêt du médicament. Néanmoins, quelques cas de thyrotoxicose, menacant le pronostic vital, ont été décrits. Les traitements classiques, tels que les antithyroïdiens de synthèse ou les corticoïdes sont habituellement sans effet ou ne modifient en rien l'évolution dramatique de la crise toxique. C'est en raison de cette inefficiacité bien établie du traitement médical, surtout chez les patients ayant une maladie thyroïdienne négligée ou ignorée, que nous avons décidé de proposer une solution chirurgicale pour ces patients. Nous rapportons ici une séries de neuf patients qui ont eu une thyroïdectomie totale ou sub-totale comme traitement, et pour cinq d'entre eux, de première intention. La thyrotoxicose a diminué rapidement après la cure chirurgicale, et l'évolutionn postopératoire a été simple. La cure chirurgicale a l'avantage d'être immédiatement efficace, avec un risque de récidive quasi nul, et d'être la seule modalité thérapeutique qui permette de continuer le traitement par l'amiodarone lorsque celui-ci est indiqué pour contrôler une arythmie menacante.
    Abstract: Resumen El hipertiroidismo inducido por amiodarone ha sido descrito, en la mayoría de los casos, como una alteración leve de la función tiroidea que returna a sus niveles normales una vez que la droga es descontinuada. Sin embargo, también se han informado casos de tiroxicosis muy graves, capaces de poner en peligro la vida del paciente. Las modalidades convencionales de tratamiento, tales como las drogas antitiroideas (tionamide) y los corticosterides, generalmente no son efectivos o fallan en cuanto a modificar la evolución de la crisis hipertiroidea. Tal ineficacia de la terapia médica, especialmente en pacientes con enfermedad tiroidea previa desconocida o no tratada, nos ha llevado a intervenir quirúrgicamente. Informamos un grupo de nueve paciente que fueron sometidos a tiroidectomia total o casi total como la modalidad primaria de tratamiento en cinco de ellos. La operación dio como resultado la rápida resolución de la tiroxicosis con recuperación libre de complicaciones. Este aproche tiene la ventaja de un inmediato y eficaz resultado, un bajo riesgo de recurrencia y, por último, parece ser la única forma de tratamiento que permite continuar la terapia con amiodarone cuando esta droga es requerida para el control de una arritmia potencialmente letal.
    Notes: Abstract Amiodaroneinduced hyperthyroidism has on most instances been reported as mild, and thyroid functions return to normal after discontinuation of the drug. Nevertheless, lifethreatening amiodaroneinduced thyrotoxicosis has also been described. Conventional treatments such as antithyroid drugs (thionamide) and corticosteroids are essentially ineffective or fail to alter the dramatic course of the thyroid crisis. This limited effectiveness of medical therapy, particularly in patients with previously neglected or unknown thyroid disease, prompted us to intervene surgically. We report a series of nine patients who underwent total or neartotal thyroidectomy as a firstline therapy for five of them. Surgery resulted in rapid resolution of thyrotoxicosis with an uneventful postoperative course. This approach has the advantage of immediate effectivity, low risk of relapse, and appears to be the only treatment that permits continued therapy with amiodarone when the drug appears needed to control a lifethreatening arrhythmia.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1573-2592
    Keywords: Rheumatoid arthritis ; immunoglobulin G ; Fcreceptor function ; monocytes ; concanavalin A
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The Fc-receptor (Fc-R) function of monocytes isolated from 19 control subjects and from 30 patients presenting with a rheumatoid arthritis (RA) was assessedin vitro by a classical rosette assay using IgG-coated sheep red blood cells. In RA patients, the percentage of monocytes forming rosettes was significantly lower than in controls (34.4±20.4 versus 67.4±4.5%;P〈0.001). The blockade observed was reversed by a prior trypsin treatment of RA monocytes, the percentage of recovery being correlated with the IgG plasma levels. Besides, IgG purified from the serum of four RA patients bound a mean of 7.3, 5.2, 1.6, and 1.6 times more than normal IgG did onto concanavalin A (Con A), peanut agglutinin (PNA), phytohemagglutinin (PHA), and pokeweed mitogen (PWM), respectively. Although similar amounts of125I-labeled normal and RA IgG were bound to normal monocytes, RA IgG inhibited more efficiently than normal IgG the Fc-R function of normal monocytes, for all concentrations tested (10 to 100 µg/100 µl). A prior treatment of RA IgG by α-mannosidase, but not by β-galactosidase, significantly reduced their inhibitory properties. The incubation of monocytes withD-mannose or mannan reduced their capacity to form rosettes. The percentage of monocytes forming rosettes in the presence of both mannan and normal IgG was significantly lower than that measured in the presence of normal IgG only. On the contrary, the rosetting capacity of monocytes in the presence of both RA IgG and mannan was the same as that calculated in the presence of RA IgG only. The inhibitory effect of RA IgG was not related to their abnormal circular dichroism. Our data suggest that the greater ability of RA IgG to block the Fc-R function of monocytes probably depends on the presence of a greater number of accessible mannosyl residues on the glycosidic side chains located in the Fc domain of the molecules.
    Type of Medium: Electronic Resource
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