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Abstract Introduction Ultrasound sonography provides a quick method for determining which nodule to sample for fine needle aspiration biopsy in thyroid nodules. On the other hand, the computed tomography examination is not restricted by echo attenuation and distinguishes between benign and malignant nodules. Objective To compare computed tomography examinations against ultrasound/fine needle aspiration biopsy in the differential diagnosis of thyroid nodules. Methods Data regarding computed tomography examinations, sonographic finding following fine needle aspiration biopsy, and tumor histology of 953 nodules from 698 patients who underwent thyroidectomy were collected and analyzed. The beneficial score for detection of the malignant tumor for each adopted modality was evaluated. Results Ultrasound images did not show a well-circumscribed solid mass in 89 nodules, and ultimately did not detect nodules in fine needle aspiration biopsies (false positive non-malignant nodules). Ultrasound images showed parenchymatous disease (false positive malignant nodules) in several nodules. Computed tomography examinations demonstrated higher difficulty in detection of malignant nodules of 1.0-2.0 cm size than ultrasound examination following fine needle aspiration biopsies; compared to tumor histological data, computed tomography examinations had a sensitivity of 0.879. Conclusion Computed tomography examinations are a more reliable method for differential diagnosis of thyroid nodules than ultrasound examinations followed by fine needle aspiration biopsy. Level of Evidence III.
Resumo Introdução A ultrassonografia é um método rápido para determinar de qual nódulo se deve coletar uma amostra para biópsia por aspiração com agulha fina. Por outro lado, o exame de tomografia computadorizada não é restringido pela atenuação do eco e distingue entre nódulos benignos e malignos. Objetivo Comparar exames tomográficos versus biópsia por ultrassonografia/aspiração por agulha fina no diagnóstico diferencial de nódulos tireoidianos. Método Dados sobre exames tomográficos, achados ultrassonográficos após biópsia por aspiração com agulha fina e histologia tumoral de 953 nódulos de 698 pacientes submetidos à tireoidectomia foram coletados e analisados. O escore de benefício para detecção do tumor maligno para cada modalidade adotada foi avaliado. Resultados As imagens de ultrassom não mostraram uma lesão sólida bem circunscrita em 89 nódulos; e na análise final não foram detectados nódulos nas biópsias por aspiração com agulha fina (nódulos não malignos falsos positivos). As imagens ultrassonográficas mostraram doença parenquimatosa (nódulos malignos falsos positivos) em vários nódulos. Os exames de tomografia computadorizada apresentaram grandes dificuldades na detecção de nódulos malignos de 1,0-2,0 cm de tamanho em comparação com o exame de ultrassonografia após biópsias por aspiração com agulha fina; comparados aos dados histológicos do tumor, os exames de tomografia computadorizada apresentaram sensibilidade de 0,879. Conclusão Os exames de tomografia computadorizada são um método mais confiável para o diagnóstico diferencial de nódulos tireoidianos do que os exames de ultrassonografia, seguidos por biópsia por aspiração com agulha fina.
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Humanos , Neoplasias de la Tiroides/diagnóstico por imagen , Nódulo Tiroideo/diagnóstico por imagen , Tomografía Computarizada por Rayos X , Estudios Retrospectivos , Sensibilidad y Especificidad , Biopsia con Aguja Fina , Diagnóstico DiferencialRESUMEN
Objective To analyze the quality of Cortex Moudan which grew for four years from main planting parts in Anhui province.Methods According to Pharmacopoeias of People Republic of China(2005 edition),the water content,the total ash content,ash content of acid infusibility,the content of the thing soak out and paeonol content were measured to investigate the quality of Cortex Moudan.Results Paeonol content of Cortex Moudan collected from main planting parts in Anhui province was from 0.98% to 1.77%.Conclusion The quality of Cortex Moudan from Nanling is the best of all.
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Objective: To inquire into the testis gene change of mouse model with kidney-yang deficiency induced by overfatigue and excessive sexual life, the modern science mechanism of syndrome of kidney-yang deficiency and kidney controlling reproduction can be revealed on the gene level. Methods: The model of kidney-yang deficiency was established by each male mouse with six female mice keeping in the same cage, and all the male mice were forced to swim for 30-40 minutes everyday lasting for four weeks. The testis genes of mice in control group and model group were detected with Mouse OneArrayTM Whole Genome DNA microarray. The differentially expressed genes were screened under the condition of the relative fluorescence intensity ratio of the two groups ≥2 and ≤0.5 and further classified according to gene function by using Molecule Annotation System (MAS) created by CapitalBio Corp. Beijing, China. Results: The mouse model with kidney-yang deficiency was established successfully by the method of overfatigue and excessive sexual life. The scatter plot of gene expression profiles of comparing control group with model group was drawn. Differentially expressed genes were screened, including 2425 up-regulated genes and 3080 down-regulated genes. Among the first one hundred up-regulated genes, 41 genes were known and among the first one hundred down-regulated genes, 62 genes were known. These genes were mainly related to the cellular structure/function, material/energy metabolism, signal transduction/transmission, inflammation/immunization, cell apoptosis, transcription/translation,proliferation/differentiation and cell cycle. Conclusion: The testis gene of kidney-yang deficiency mouse had a wide change. The essence of kidney-yang deficiency syndrome and the theory of the kidney originating and controlling life reproduction were explained on the gene level.