ABSTRACT
@#Abstract: Objective To analyze the accuracy and feasibility of GeneXpert MTB/RIF (GeneXpert) detection in the detection of Mycobacterium tuberculosis and the characteristics of rifampicin-resistant rpoB gene mutations. Methods A total of 4 234 sputum samples from suspected tuberculosis patients diagnosed in Sanya tuberculosis designated hospitals from 2015 to 2021 were selected and subjected to sputum smear, solid culture, drug sensitivity test by solid proportion method and GeneXpert detection. Results The positive detection rates of sputum smear, solid culture and GeneXpert of 4 234 sputum samples were 29.24% (1 238/4 234), 32.17% (1 362/4 234) and 35.40% (1 499/4 234), respectively. The positive detection rate of GeneXpert was higher than that of sputum smear, and the difference was statistically significant (χ2=36.775, P<0.01). It was slightly higher than solid culture, and the difference was not statistically significant (χ2=9.908, P=0.02). Taking solid culture results as the gold standard, the sensitivity and specificity of GeneXpert for detecting MTB were 91.04% (1 240/1 362) and 90.98% (2 613/2 872), respectively. According to the proportional drug susceptibility test results as the gold standard, the sensitivity and specificity of GeneXpert in detecting rifampicin resistance were 96.96% (96/99) and 98.86% (1 128/1 141), respectively, with the consensus rate of 98.71%. The accuracy of rifampicin resistance in GeneXpert group without probe mutation was significantly lower than that in group with probe mutation. There was a statistical difference in probe mutation frequency between newly treated and retreated cases. The analysis of rpoB gene mutation frequency characteristics showed: Probe E (50.00%) > Probe A (22.12%) > Probe D (14.42%) > Probe B (6.73%) > combined probe (5.77%) > Probe C (0.96%). Conclusions GeneXpert detection can quickly and effectively diagnose rifampicin-resistant tuberculosis, which is helpful for early clinical diagnosis and treatment. In this region, the rpoB gene mutation probes of rifampicin-resistant tuberculosis mainly occurr in Probe E and Probe A, with the least mutations in Probe C.
ABSTRACT
Abstract Introduction In many regions, laryngeal carcinoma is a common upper respiratory tract cancer, most commonly involving the glottic region. The treatment of early glottic cancer includes radiotherapy, open surgery and laryngeal laser microsurgery. However, the preferred treatment for early glottic cancer is still controversial. Objectives To study the factors affecting the 5-year survival rate of Tis-2N0M0 early glottis cancer and to demonstrate the oncological safety of different treatments. Methods 144 patients with early glottic cancer were analyzed retrospectively. All patients were clinically node negative. 53 patients underwent open surgery, transoral CO2 laser microsurgery in 46 cases and radiotherapy in 45 cases. The patients were followed up for 26 − 84 months, with an average follow-up period of 62.9 months. Results The 5-year overall survival was 82.6%. The 5 year survival rates of open surgery, laser microsurgery and radiotherapy were 83.0%, 82.6% and 82.2%, respectively. There was no significant difference in 5-year survival rate among the three treatments (p= 0.987). In multivariate analysis, age, T-stage, pathological grading, and anterior commissure involvement were important prognostic factors for early glottic cancer. Conclusion There was no significant difference in 5 year survival rate among patients treated by either radiotherapy, laser microsurgery or open surgery for early glottic cancer. We urge more attention to the age, T-stage, pathological grade, and anterior commissure involvement of the patients.
Resumo Introdução Em muitas regiões, o carcinoma de laringe é um câncer comum do trato respiratório superior e geralmente envolve a região glótica. O tratamento do câncer glótico inicial inclui radioterapia, cirurgia aberta e microcirurgia a laser de laringe. Entretanto, a forma preferencial de tratamento do câncer glótico inicial ainda é controverso. Objetivos Estudar os fatores que afetam a taxa de sobrevida em 5 anos do câncer glótico inicial Tis-2N0M0 e demonstrar a segurança oncológica de diferentes tratamentos. Método Um total de 144 pacientes com câncer glótico inicial foram analisados retrospectivamente. Todos os pacientes eram clinicamente negativos para linfonodos. Cinquenta e três pacientes foram submetidos à cirurgia aberta, 46 à microcirurgia transoral a laser de CO2, e radioterapia em 45 casos. Os pacientes foram acompanhados por 26 a 84 meses, com um período médio de seguimento de 62,9 meses. Resultados A sobrevida global em 5 anos foi de 82,6%. As taxas de sobrevida em cinco anos da cirurgia aberta, microcirurgia a laser e radioterapia foram de 83,0%, 82,6% e 82,2%, respectivamente. Não houve diferença significante na taxa de sobrevida em cinco anos entre os três tratamentos (p = 0,987). Na análise multivariada, idade, estágio T, classificação histopatológica e envolvimento da comissura anterior foram fatores prognósticos importantes para o câncer glótico inicial. Conclusão Não houve diferença significante na taxa de sobrevida em 5 anos entre radioterapia, microcirurgia a laser e cirurgia aberta para câncer glótico inicial. Deve-se estar atento à idade, estágio T, histopatológico e envolvimento da comissura anterior dos pacientes.