ABSTRACT
INTRODUCCIÓN: el cáncer de pulmón es un problema de salud que afecta de forma significativa a la humanidad. OBJETIVO: describir las características clínicas de la enfermedad y su asociación con la variedad histológica. MÉTODOS: se realizó un estudio descriptivo transversal en 107 pacientes con cáncer de pulmón hospitalizados en los servicios de Medicina Interna y Neumología del Hospital "Hermanos Ameijeiras", en el período de marzo 2012 a febrero de 2013. RESULTADOS: el 66,4 % de los pacientes fueron hombres con una edad media de 65,9 años y el 61,7 %, fumadores. La forma clínica de presentación más común fue la bronconeumónica en el 20,6 %, y el síntoma, la tos en 63,6 %. En el adenocarcinoma de pulmón, el 30,4 % presentó la forma bronconeumónica. CONCLUSIONES: la atelectasia y la forma clínica de presentación pleural se asociaron al carcinoma escamoso y al adenocarcinoma, respectivamente.
INTRODUCTION: lung cancer is a health problem that significantly affects how mankind. OBJECTIVE: describe the clinical features and its association with histological subtype in patients with lung cancer. METHODS: across-sectional study was conducted in 107 patients with lung cancer hospitalized in the services of internal medicine and pneumology at Hermanos Ameijeiras Hospital from March 2012 to February 2013. RESULTS: 66.4 % of the patients were men with a mean age of 65.9 years and 61.7 % had smoking habits. Broncho-pneumonia was the most common clinical form of presentation in 20.6 % and symptom, cough in 63.6 %. In lung adeno-carcinoma, 30.4 % had the broncho-pneumonic form. CONCLUSIONS: atelectasis and pleural clinical form of presentation were associated with squamous cell carcinoma and adeno-carcinoma, respectively.
Subject(s)
Humans , Lung Neoplasms/diagnosis , Lung Neoplasms/ethnology , Lung Neoplasms/history , Lung Neoplasms/prevention & control , Epidemiology, Descriptive , Cross-Sectional StudiesABSTRACT
OBJECTIVE: To estimate and compare the frequency of CYP1A1*2A gene polymorphisms in a Brazilian population and determine the possible contribution of these genetic variations to lung cancer risk. METHODS: The study population included 200 patients with lung cancer, and the control group consisted of 264 blood donors. Genomic DNA was obtained from peripheral blood samples. The PCR-RFLP method was used for analysis of the CYP1A1*2A gene. RESULTS: There was no statistically significant difference between the lung cancer patients and the controls in terms of the distribution of CYP1A1*2A polymorphisms (p = 0.49). A multivariate logistic regression model analysis by ethnic group revealed that, within the lung cancer group, the CYP1A1*2A genotype CC plus TC was more common among the African-Brazilian patients than among the White patients (adjusted OR = 3.19; 95 percent CI: 1.53-6.65). CONCLUSIONS: The CYP1A1*2A gene cannot be linked with lung cancer risk in Brazilian patients at this time. Larger epidemiologic studies are needed in order to establish whether the CC plus TC polymorphism increases the risk of lung cancer in African-Brazilians.
OBJETIVO: Estimar e comparar a frequência do gene polimórfico CYP1A1*2A na população brasileira e determinar uma possível contribuição dessas variações genéticas no risco para câncer de pulmão. MÉTODOS: A população estudada incluiu 200 pacientes com câncer de pulmão e o grupo controle consistiu em 264 doadores de sangue. O DNA genômico foi obtido de amostras de sangue periférico. O método usado para a análise do gene CYP1A1*2A foi a PCR-RFLP. RESULTADOS: A distribuição do gene CYP1A1*2A polimórfico não foi estatisticamente diferente entre os pacientes com câncer de pulmão e os controles (p = 0,49). Uma análise multivariada utilizando-se o modelo de regressão logística por grupo étnico revelou uma maior frequência do genótipo CC + TC do gene CYP1A1*2A no grupo de pacientes afro-brasileiros do que no grupo de pacientes caucasoides com câncer de pulmão (OR ajustada = 3,19; IC95 por cento: 1,53-6,65). CONCLUSÕES: O gene CYP1A1*2A não pode ser associado ao risco de câncer de pulmão nesta amostra de pacientes. Um extenso estudo epidemiológico é necessário para estabelecer se os genótipos CC + TC aumentam o risco de câncer de pulmão em afro-brasileiros.
Subject(s)
Female , Humans , Male , Middle Aged , /genetics , Lung Neoplasms/genetics , Polymorphism, Genetic , Black People/genetics , Brazil/ethnology , Disease Susceptibility , Epidemiologic Methods , White People/genetics , Genotype , Lung Neoplasms/ethnologyABSTRACT
AIM: To examine the prevalence of cigarette smoking, histological types, staging at presentation and resectability among Thai patients with lung cancer. SETTING: A 500-bed referral cardiothoracic centre. METHOD: Prospective study with pre-defined outcome data, from January to December 1996. RESULTS: A total of 349 patients were histologically proved to have lung cancer. The mean age was 60 years (SD 12.5). There were 264 males and 85 females. 269 patients (77%) were smokers. Percentage of histopathologic types were 39 per cent adenocarcinoma, 30 per cent squamous cell carcinoma, 20 per cent undifferentiated cell carcinoma, and 11 per cent small cell carcinoma. The association with smoking is stronger in squamous cell carcinoma and small cell carcinoma and weaker in adenocarcinoma. Most patients (82%) were in advanced stages, stage 3B and 4.18 per cent of the patients were in stages eligible for surgery, i.e. stage 1, 2 and 3A. However, only 9.7 per cent of the patients were operable and 9.1 per cent were resectable. CONCLUSIONS: On reaching the diagnosis, most patients with lung cancer were in advanced stages of the disease, rendering a low resectability. The results emphasise the need for early diagnostic intervention in patients presenting with lung mass. Furthermore, preventive measures including a campaign against cigarette smoking, research into other possible aetiological factors should be more encouraged.