Browsing by Author "Alegria, C"
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- A acuidade da Ressonância Magnética e da biopsia estereotáxica no diagnóstico de lesões cerebraisPublication . Filipe, MA; Soares, A; Alegria, C
- Complicações da Radiocirurgia no tratamento de MAV´s cerebraisPublication . Brás, MA; Oliveira, L; Alegria, C
- Derivaciones ventriculares externas – casuística de un año en el Hospital de BragaPublication . Ramos, R; Moreira, R; Almeida-Pinto, A; Alegria, C; Almeida, R
- Giant cell glioblastoma: review of the literature and illustrated casePublication . Valle-Folgueral, JM; Mascarenhas, L; Costa, JA; Vieira, F; Soares-Fernandes, J; Beleza, P; Alegria, CGiant cell glioblastoma is an infrequent variety of glioblastoma (5% of the cases). It has deserved a separate category in the World Health Organization classification of grade IV tumors. The clinical, imaging, histological and immunohistochemical characteristics, and the genetic alterations are reviewed. Treatment and prognosis are discussed and updated. The case of a patient that survived 19 months and died of spinal leptomeningeal metastases is illustrated.
- Gliossarcoma com metastização do neuro-eixo: caso clínico.Publication . Ramos, R; Lima, J; Moreira, R; Oliveira, L; Soares, A; Almeida, R; Alegria, C; Silva, A; Pardal, F
- Gliossarcomas: casuística do Hospital de BragaPublication . Ramos, R; Lima, J; Moreira, R; Oliveira, L; Soares, A; Almeida, R; Alegria, C; Silva, A; Pardal, F
- Hematoma subdural raquidianoPublication . Ribeiro, M; Cerqueira, J; Fernandes, J; Alegria, C; Rocha, JSpinal subdural haematoma is a rare pathology and may cause severe neurological deficit. In this paper a case of acute spinal subdural haematoma of multifactorial etiology--traumatic versus iatrogenic--is presented, in which the clinical evaluation, Computerized Tomography and Magnetic Resonance were of utmost importance as far as the early diagnosis is concerned, allowing therefore decompressive surgery to avoid neurological deficit development.
- Impact of EGFR genetic variants on glioma risk and patient outcomePublication . Costa, BM; Viana-Pereira, M; Fernandes, R; Costa, S; Linhares, P; Vaz, R; Pinheiro, C; Lima, J; Soares, P; Silva, A; Pardal, F; Amorim, J; Nabiço, R; Almeida, R; Alegria, C; Pires, MM; Pinheiro, C; Carvalho, E; Oliveira, P; Lopes, JM; Reis, RMBACKGROUND: The epidermal growth factor receptor (EGFR) regulates important cellular processes and is frequently implicated in human tumors. Three EGFR polymorphisms have been described as having a transcriptional regulatory function: two single-nucleotide polymorphisms in the essential promoter region, -216G/T and -191C/A, and a polymorphic (CA)(n) microsatellite sequence in intron 1. We aimed to elucidate the roles of these EGFR polymorphisms in glioma susceptibility and prognosis. METHODS: We conducted a case-control study with 196 patients with glioma and 168 cancer-free controls. Unconditional multivariate logistic regression models were used to calculate ORs and 95% confidence intervals. A Cox regression model was used to evaluate associations with patient survival. False-positive report probabilities were also assessed. RESULTS: None of the EGFR -216G/T variants was significantly associated with glioma risk. The -191C/A genotype was associated with higher risk for glioma when the (CA)(n) alleles were classified as short for ≤16 or ≤17 repeats. Independently of the (CA)(n) repeat cutoff point used, shorter (CA)(n) repeat variants were significantly associated with increased risk for glioma, particularly glioblastoma and oligodendroglioma. In all tested models with different (CA)(n) cutoff points, only -191C/A genotype was consistently associated with improved survival of patients with glioblastoma. CONCLUSIONS: Our findings implicate EGFR -191C/A and the (CA)(n) repeat polymorphisms as risk factors for gliomas, and suggest -191C/A as a prognostic marker in glioblastoma. IMPACT: Our data support a role of these EGFR polymorphisms in determining glioma susceptibility, with potential relevance for molecularly based stratification of patients with glioblastoma for individualized therapies
- Incisão sublabial versus columelar no acesso trans-septal para cirurgia trans-esfenoidal microscópica da hipófise. Estudo retrospectivoPublication . Guimarães, J; Santos, J; Miranda, D; Carvalho Moreira, F; Marçal, N; Pereira, G; Marques, O; Almeida, R; Vilarinho, S; Frias, A; Alegria, C; Pratas, RObjectivos: Comparar a incisão sublabial com a incisão columelar no acesso trans-septal para cirurgia trans- -esfenoidal microscópica da hipófise, quanto às complicações perioperatórias e sequelas observadas. Desenho do estudo: Estudo retrospectivo. Material e métodos: Revisão dos registos clínicos de 50 doentes submetidos a cirurgia trans-esfenoidal microscópica para ressecção de adenoma da hipófise, no Hospital de Braga, entre Julho de 2007 e Novembro de 2010. Foram colhidos e avaliados dados demográficos, co-morbilidades pré-operatórias, classificações histológica e imagiológica do adenoma, duração da cirurgia, duração do internamento e complicações per(pré)- e pós-operatórias. O seguimento dos doentes foi entre um e seis meses. Na análise estatística foi utilizado o programa SPSS® Statistics 17.0. Resultados: 50 doentes, 32 (64%) do sexo feminino e 18 (36%) do sexo masculino, com idades compreendidas entre os 16 e 87 anos, média de 50 anos. 40 (80%) casos tratavam-se de macroadenomas e 10 (20%) de microadenomas. 15/47 (31.9%) doentes foram submetidos a cirurgia trans-esfenoidal transseptal através de incisão columelar e 32/47 (68.1%) doentes através de incisão sublabial. Verificaram-se complicações oronasais num total de 5/14 (35.7%) doentes no grupo em que foi utilizada incisão columelar e 14/29 (48.3%) doentes no grupo em que foi utilizada incisão sublabial (p>0.05). Verificou-se que doentes com excesso de peso tiveram mais frequentemente complicações (p<0.01). Não se verificaram diferenças estatisticamente significativas na taxa de doentes com complicações de acordo com a idade, género, incisão cirúrgica utilizada, tipo de adenoma, ou em doentes com outras co-morbilidades pré-operatórias. A duração da cirurgia e do internamento não tiveram diferenças estatisticamente significativas relativamente à incisão cirúrgica utilizada. Conclusões: As incisões sublabial e columelar na cirurgia trans-esfenoidal mostraram, neste estudo, não afectar as taxas de complicações per(pré)- e pós-operatórias. Título abreviado: Cirurgia trans-esfenoidal da hipófise Palavras-chave: cirurgia trans-esfenoidal, cirurgia da hipófise, complicações da cirurgia da hipófise, adenoma da hipófise.
- Pharmacological versus microvascular decompression approaches for the treatment of trigeminal neuralgia: clinical outcomes and direct costsPublication . Lemos, L; Alegria, C; Oliveira, J; Machado, A; Oliveira, P; Almeida, AIn idiopathic trigeminal neuralgia (TN) the neuroimaging evaluation is usually normal, but in some cases a vascular compression of trigeminal nerve root is present. Although the latter condition may be referred to surgery, drug therapy is usually the first approach to control pain. This study compared the clinical outcome and direct costs of (1) a traditional treatment (carbamazepine [CBZ] in monotherapy [CBZ protocol]), (2) the association of gabapentin (GBP) and analgesic block of trigger-points with ropivacaine (ROP) (GBP+ROP protocol), and (3) a common TN surgery, microvascular decompression of the trigeminal nerve (MVD protocol). Sixty-two TN patients were randomly treated during 4 weeks (CBZ [n = 23] and GBP+ROP [n = 17] protocols) from cases of idiopathic TN, or selected for MVD surgery (n = 22) due to intractable pain. Direct medical cost estimates were determined by the price of drugs in 2008 and the hospital costs. Pain was evaluated using the Numerical Rating Scale (NRS) and number of pain crises; the Hospital Anxiety and Depression Scale, Sickness Impact Profile, and satisfaction with treatment and hospital team were evaluated. Assessments were performed at day 0 and 6 months after the beginning of treatment. All protocols showed a clinical improvement of pain control at month 6. The GBP+ROP protocol was the least expensive treatment, whereas surgery was the most expensive. With time, however, GBP+ROP tended to be the most and MVD the least expensive. No sequelae resulted in any patient after drug therapies, while after MDV surgery several patients showed important side effects. Data reinforce that, (1) TN patients should be carefully evaluated before choosing therapy for pain control, (2) different pharmacological approaches are available to initiate pain control at low costs, and (3) criteria for surgical interventions should be clearly defined due to important side effects, with the initial higher costs being strongly reduced with time.