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Title: Efeitos tardios na função hipotálamo-hipófise após tratamento de tumores parasselares
Other Titles: Late effects on hypothalamic-pituitary function following treatment of paraselar tumours
Authors: Motta, Luiz Augusto Casulari Roxo da
Martinelli, Cláudio
Farage Filho, Miguel
Gagliardi, Antonio Ricardo Toledo
Abrahão, André Luiz Andrade
Motta, Lucília Domingues Casulari da
Issue Date: 1991
Publisher: Academia Brasileira de Neurologia - ABNEURO
Citation: MOTTA, Luiz A. Casulari Roxo da et al . Efeitos tardios na função hipotálamo-hipófise após tratamento de tumores parasselares. Arquivos de Neuro-Psiquiatria, São Paulo, v.49, n. 3, p. 299-306, set. 1991. Disponível em <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0004-282X1991000300011&lng=pt&nrm=iso>. Acesso em: 08 out. 2018. http://dx.doi.org/10.1590/S0004-282X1991000300011.
Abstract: O acompanhamento a longo prazo de pacientes submetidos a tratamento de tumores da região parasselar é importante para detectar complicações tardias da terapêutica. Neste estudo avaliamos 6 pacientes com craniofaringioma, 1 com meningioma, 1 com germinoma e 1 com cisto epidermóíde, localizados na região parasselar. Eles haviam sido tratados, em média, 3,8±3,2 anos antes, por cirurgia e radioterapia (6 casos) ou somente cirurgia (3 casos). Cinco pacientes eram do sexo feminino e a média de idade era de 24,3±18,8 anos. A avaliação consistiu na infusão endovenosa de TRH (200 mg), GnRH (100 mg) e insulina regular (0,1 UI Kg/peso), bem como na dosagem dos hormônios hipofisários antes (0) e após 20, 40, 60 e 80 minutos. Encontramos os seguintes resultados: (a) resposta deficitária do GH e do cortisol era todos pacientes; (b) 7/9 pacientes não tiveram respostas adequadas do FSH e 3/9 do L.H; (c) 4/9 tiveram respostas inadequadas da prolactina e 2/8 do TSH. Concluimos que: (a) o déficit de GH e cortisol são os mais frequentes nestes pacientes; (b) a lesão após radioterapia pode localizar-se tanto no hipotálamo quanto na hipófise ou, ainda, em ambos; (c) a sensibilidade das células hipofisárias e hipotalâmicas à irradiação é diferente de acordo com os hormônios que produzem; (d) é necessário o acompanhamento endocrinológico frequente dos pacientes submetidos a tratamento de tumores parasselares, a fim de detectar déficits hormonais tardios.
Abstract: Long term follow-up of patients submitted to treatment of paraselar tumours region is important for the detection of late therapeutic complications. In this study the authors conducted an evaluation of six patients with craniopharyngioma, one with germinoma, one with meningioma, and one epidermoid cyst. All above tumours were localized at paraselar region. Six out of nine patients had been treated both by surgery and by radiotherapy and the other three surgically only, on an average 3.8±3.2 years before this observation was carried out. Five patients were female with their ages average 24.3±18.8 years old. Evaluation consisted: in the first place, an intravenous infusion of thyrotropin-releasing hormone (TRH, 200 mg), gonadotropin-releasing hormone (GnRH, 100 mg), and insulin tolerance test (0,1 IU/Kg, regular insulin); and secondly, in measurements of pituitary hormones secretion at different time points - 0, 20,40, 60 and 80 minutes. We found both diminished response of growth hormone and Cortisol in all the patients. Seven out of nine patients did not have adequate response to follicle-stimulating hormone. Three out of nine responded unsatisfactory to luteinizing hormone. Four out of nine showed inadequate responses to prolactin as well as, two out of eight to thyrotropin. We concluded that: (a) growth hormone and Cortisol deficiency are the most frequent finding in these patients; (b) post-radiotherapy lesions can be located in the hypothalamus or pituitary, or even in both; (c) hypophsial and hypothalamic cell sensitivity to irradiation is different, according to their respective hormones; and (d) it is necessary a frequent endocrinologic follow-up of patients to detect late hormonal deficiences.
DOI: http://dx.doi.org/10.1590/S0004-282X1991000300011
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