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OBJECTIVES: To assess the value of ultrasonography (US) features for determining the malignant potential of complex cystic lesions. METHODS: Seventy-nine complex cystic lesions were reviewed retrospectively. They were classified into four types according to US features in type I, the masses have a thick outer wall, thick internal septa, or both; in type II, the masses are an intracystic type with one or more discrete solid mural lesions within a cyst; in type III, the masses contain mixed cystic and solid components and are at least 50% cystic portion in a mass; in type IV, there are predominantly (at least 50%) solid masses with eccentric or central cystic foci. Positive predictive values were calculated for all types. RESULTS: The frequency of malignancy was higher among type III and IV lesions than among the other two types. Lesions with a diameter greater than or equal to 20 mm, margins not circumscribed, resistance index greater than or equal to 0.7, and axillary abnormal nodes had a high probability of malignancy. CONCLUSIONS: US is an important adjunct to evaluate the malignant potential of complex cystic lesions.
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Neoplasias de la Mama/diagnóstico por imagen , Enfermedad Fibroquística de la Mama/diagnóstico por imagen , Ultrasonografía Mamaria/métodos , Adolescente , Adulto , Anciano , Quistes/diagnóstico por imagen , Diagnóstico Diferencial , Femenino , Humanos , Persona de Mediana Edad , Reproducibilidad de los Resultados , Estudios Retrospectivos , Adulto JovenRESUMEN
Nanotechnology is an emerging paradigm for creating functional nanoscale materials for various biomedical applications. In this study, a new nanotechnology-based drug delivery method was developed using gold nanoparticles (GNPs) as a delivery vehicle to reduce adverse drug side effects. Fludarabine Phosphate is a commercial chemotherapy drug used in cancer treatment, and has ability to kill various cancer cells. KG-1 cell, a type of acute cancer leukemia cell, was selected as a proof-of-concept target in this study. Due to the small size of GNPs, they can help Fludarabine Phosphate enter cancer cells more efficiently and better interfere with DNA synthesis in the cancer cells. To enhance targeting ability, folic acid molecules were also covalently linked to GNPs, resulting in GNP-Fludarabine-folic acid (GNP-F/f). Compared to treatments with GNP-F or drugs on its own (Fludarabine Phosphate), the GNP-F/f achieves much improved cell-killing effects. The UV-Vis spectra results also revealed that the drugs had successfully bonded covalently to the GNPs. The higher cell-killing efficiency of GNP-F/f compared with GNP-Fludarabine (GNP-F) or drugs on their own further validates the effectiveness of both the vectors (GNPs) and folic acid in enhancing the drug delivery to the cancer cells. The MTT viability tests showed that the GNPs had no cytotoxicity.
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Antineoplásicos/administración & dosificación , Oro/química , Neoplasias Hematológicas/tratamiento farmacológico , Nanopartículas del Metal , Fosfato de Vidarabina/análogos & derivados , Línea Celular Tumoral , Humanos , Microscopía Electrónica de Transmisión , Espectrofotometría Ultravioleta , Fosfato de Vidarabina/administración & dosificaciónRESUMEN
PURPOSE: To compare the diagnostic performance of contrast-enhanced ultrasound (CEUS) with MRI for complex cystic renal masses. METHODS: The study received approval from our Ethics Committee, and all subjects provided informed consent. Seventy-one complex cystic renal masses were assessed using CEUS and MRI in 59 patients (44 men and 15 women; age range, 21-78 years; mean age, 49.6 years). The masses were classified as malignant or benign based on the Bosniak classification system (benign, categories II and IIF; malignant, categories III and IV). The diagnostic performances of CEUS and MRI for complex cystic renal masses were compared with the final diagnosis in each case obtained by histopathology (n = 43) or imaging follow-up (n = 28). RESULTS: Among 71 complex cystic renal masses, 35 were benign and 36 were malignant. The sensitivity, specificity, and overall accuracy of CEUS in assessing the masses were 97.2%, 71.4%, and 84.5% versus 80.6%, 77.1%, and 78.9% for MRI; the areas below the receiver operating characteristic curves of CEUS and MRI were 0.84 and 0.79, respectively. The agreement between the classification using CEUS and the final diagnoses was fair to good (κ = 0.70), and the agreement between MRI and the final diagnoses was also fair to good (κ = 0.58). CONCLUSIONS: CEUS has higher diagnostic sensitivity and accuracy but lower specificity than MRI for classifying complex cystic renal masses. © 2014 Wiley Periodicals, Inc. J Clin Ultrasound 43:203-209, 2015.
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Recently, there has been a lot of interest in using gold nanoparticles (GNPs) for biomedical applications due to their biocompatibility. To increase GNP cell uptake and circulation half-life, and to improve its bio-distribution in vivo, we chose to coat GNPs with 1-palmitoyl-2-oleoyl-sn-glycero-3-phospho-(1'-rac-glycerol) (sodium salt) (POPG) and polyethylene glycol (PEG). Two different methods were used to synthesize POPG-GNPs or PEG-GNPs, but the resulting nanoparticle sizes and morphologies were similar. Under the same incubation conditions, POPG-GNPs can be uptaken quicker than PEG-GNPs by cells-specifically, the maximum uptake was 8 h versus 16 h after incubation. In addition, the uptake amount of POPG-GNPs was more than that of PEG-GNPs. The uptake processes were confirmed by SEM and TEM images. The main reason for the greater uptake of POPG-GNPs can be attributed to the structural similarities between the POPG coating and the cell membrane as well as GNP aggregation.
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Endocitosis , Oro/metabolismo , Nanopartículas del Metal/química , Fosfatidilgliceroles/metabolismo , Polietilenglicoles/metabolismo , Muerte Celular/efectos de los fármacos , Línea Celular Tumoral , Endocitosis/efectos de los fármacos , Oro/química , Oro/farmacología , Humanos , Cinética , Nanopartículas del Metal/ultraestructura , Fosfatidilgliceroles/química , Fosfatidilgliceroles/farmacología , Polietilenglicoles/química , Polietilenglicoles/farmacologíaRESUMEN
In this article, we report a new method-a sonication method to disperse iron oxide nanoparticles into smaller nanoparticles and make gold ions absorb onto the surface or trapped in the micropores of the iron oxide nanoparticles using sonication action. By using quick reduction of ascorbic acid and post-HCI solution treatment, gold covered magnetic nanoparticles (mGNPs) with spherical morphology and uniform size were synthesized in a water solution. The size of the mGNPs was found to be 20-30 nm. Some ideal mGNPs possessed a core-shell structure. The mGNPs were non-cytotoxic and mGNP-fluorescein isothiocyanate (FITC) can enter KG-1 cells when driven by an external magnetic force, which was confirmed by confocal imaging. The confocal image also showed the FITC inside the KG-1 cells was near the nucleus. The fluorescein isothiocyanate (FITC) delivery efficiency is about 100% according to the flow cytometry results.
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Fluoresceína-5-Isotiocianato/administración & dosificación , Oro/química , Nanopartículas del Metal , Línea Celular , Humanos , Magnetismo , Microscopía de Fuerza Atómica , Microscopía Confocal , Microscopía FluorescenteRESUMEN
In this paper, fluorescein isothiocyanate (FITC) was covalently bonded with magnetic single-walled carbon nanotubes (mSWCNTs) that were purified using our previous method. To demonstrate our design, mSWCNT-FITC was delivered into plant cells (canola and carrot cells) driven by external magnetic forces. From FACS results, the FITC delivery efficiency was about 100% for both two canola and carrot protoplasts, which were further confirmed by the confocal and sectional TEM images. Some mSWCNTs were found trapped both inside the endosomes of canola protoplast and outside endosome near the nuclear membrane of carrot protoplast according to the sectional TEM images. All results showed that mSWCNT is a good delivery carrier for biomolecules.
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OBJECTIVE: To assess the value of application of percutaneous radiofrequency ablation (RFA) with artificial hydrothorax for liver cancer in the hepatic dome. METHODS: Thirty-two patients with 43 lesions of hepatic malignant tumors in the hepatic dome underwent ultrasound-guided percutaneous radiofrequency ablation (RFA) with artificial hydrothorax. Artificial hydrothorax was created by infusion of saline via an intrathoracically placed 14-G central venous catheter, which was ultrasound-guided percutaneously inserted before RFA, separating the right lung from the hepatic dome. The adverse reaction and therapeutic efficacy were also analyzed. RESULTS: In the 32 patients with 43 lesions in the hepatic dome (4 tumors in segment IV 21 tumors in segment VII and 18 tumors in segment VIII), 18 lesions of 14 patients were not observed by ultrasound before the operation. Thirty-two patients received the ultrasound-guided placement of intrathoracical catheter, and (1606.3 ± 485.9) ml (1000 - 2500 ml) saline solution was infused successfully. After obtaining an image of the whole tumor, 31 patients received percutaneous RFA therapy on schedule, and 22 patients received percutaneous transdiaphragmatic RFA therapy. One patient with 2 lesions gave up the treatment, because one of his tumors was not detectable by ultrasound. Diaphragmatic muscle hemorrhage was seen in two patients, subcutaneous edema in two patients, and pneumothorax in one patient. All the complications were cured, and no serious complications or related death occurred. 1-month follow-up with contrast-enhanced CT/MRI images showed that 29 patients had complete ablation, and the effective rate of this technique was 93.5% (29/31). CONCLUSIONS: Artificial hydrothorax helps us not only to visualize the whole tumor in the hepatic dome, but also offers a transdiaphragmatic route for therapy. Ultrasound-guided percutaneous RFA with artificial hydrothorax is a feasible, safe, and effective technique for treating liver cancer in the hepatic dome and worthy of being promoted.
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Carcinoma Hepatocelular/cirugía , Ablación por Catéter/métodos , Neoplasias Hepáticas/cirugía , Adulto , Anciano , Carcinoma Hepatocelular/diagnóstico por imagen , Femenino , Estudios de Seguimiento , Humanos , Hidrotórax , Neoplasias Hepáticas/diagnóstico por imagen , Masculino , Persona de Mediana Edad , Cloruro de Sodio , Ultrasonografía IntervencionalRESUMEN
OBJECTIVE: To assess the value of an infusion-based separation technique to assist in ultrasound (US)-guided percutaneous radiofrequency ablation (RFA) of liver cancers abutting the liver edge. METHODS: Twenty-four cases of malignant liver tumors abutting the hepatic edge were treated with US-guided puncture accompanied by the assistant infusion technique. The US-guided puncture was made with a 22-G needle through the hepatic tissue and into the abdominal cavity near the target tumor. Infusion of a saline solution was used to separate the liver from any surrounding structures so that percutaneous RFA could be safely performed. Complications, including gastrointestinal injury, hemorrhage and death, were recorded. Technical efficacy and safety were evaluated. RESULTS: Among the 24 patients, the target tumors were adjacent to the right kidney (n=6), colon (n=6), stomach (n=5), pericardium (n=4), and gall bladder (n=3). Twenty-three patients received a successful radical percutaneous RFA with assistant infusion. The assistant infusion volumes ranged from 80-390 ml and created spaces ranging from 0.8-2.5 cm between the liver and surrounding structures. Five of the cases with tumors adjacent to the stomach or colon received the largest volume infusions. The infusion failed to create a separation space in only one case, due to the presence of an adhesion; as a result, this patient was treated with palliative RFA. The mean hospital stay for all 24 patients was four days after surgery. No severe complications or deaths occurred. At 1-month follow-up, computed tomography images showed that 22 cases had complete ablation, yielding a technical success rate of 95.7% (22/23). No needle track implantation was observed. CONCLUSION: Assistant infusion for percutaneous radiofrequency ablation creates a protective space between the liver and surrounding structures in patients with liver tumors abutting the liver edge. This safe and effective assistant technique broadens the range of patients available for percutaneous RFA treatment.
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Carcinoma Hepatocelular/cirugía , Ablación por Catéter/métodos , Neoplasias Hepáticas/cirugía , Adulto , Anciano , Femenino , Humanos , Soluciones Isotónicas/administración & dosificación , Masculino , Persona de Mediana Edad , Resultado del Tratamiento , Ultrasonografía IntervencionalRESUMEN
1-Ethyl-3-(3-dimethylaminopropyl) carbondiimide hydrochloride (EDC) is commonly used as a crosslinker to help bind biomolecules, such as DNA plasmids, with nanostructures. However, EDC often remains, after a crosslink reaction, in the micro-aperture of the nanostructure, e.g., carbon nanotube. The remaining EDC shows positive green fluorescent signals and makes a nanostructure with a strong cytotoxicity which induces cell death. The toxicity of EDC was confirmed on a breast cancer cell line (MCF-7) and two leukemic cell lines (THP-1 and KG-1). The MCF-7 cells mainly underwent necrosis after treatment with EDC, which was verified by fluorescein isothiocyanate (FITC) annexin V staining, video microscopy and scanning electronic microscopy (SEM). If the EDC was not removed completely, the nanostructures with remaining EDC produced a green fluorescent background that could interfere with flow cytometry (FACS) measurement and result in false information about GFP plasmid delivery. Effective methods to remove residual EDC on macromolecules were also developed.
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Etildimetilaminopropil Carbodiimida/farmacología , Técnicas de Transferencia de Gen , Proteínas Fluorescentes Verdes/metabolismo , Magnetismo , Nanotubos de Carbono/química , Plásmidos/metabolismo , Anexina A5/metabolismo , Muerte Celular/efectos de los fármacos , Línea Celular Tumoral , Precipitación Química , ADN/metabolismo , Etanol/química , Citometría de Flujo , Fluoresceína-5-Isotiocianato/metabolismo , Humanos , Nanotubos de Carbono/ultraestructura , Espectrofotometría Ultravioleta , Succinimidas/química , TransfecciónRESUMEN
OBJECTIVE: To compare the sonographic findings with pathological features of ovarian thecoma, and to analyze the relationship between them. METHODS: The sonograms of 45 ovarian thecoma cases were reviewed retrospectively and categorized into three subtypes as sound attenuation pattern, homogeneous hypoechoic pattern and solid and cystic mixed pattern. The pathological findings were classified as theca cell-predominant, fibroblast-predominant and mixed thecoma according to the cellular composition of the tumors. Hyaline degeneration and luteinization of the tumors were recorded. The pathologic findings of each subtype based on sonography were compared. RESULTS: Of the 45 patients, there were 34 (75.6%) solid ovarian lesions, 15 (33.3%) of those showed a sound-attenuation pattern with an anterior hypoechoic zone and posterior acoustic attenuation in sonography, the other 19 (42.2%) cases had homogeneous hypoechoic pattern with no posterior acoustic attenuation, and the remaining 11 (24.4%) cases presented as a solid and cystic mixed pattern. There were no significant differences in pathological cellular composition among the three sonographic subtypes. Five solid tumors containing hyaline degeneration and one with luteinization were found to have posterior acoustic attenuation. The solid and cystic mixed thecomas showed cystic degeneration and hemorrhage. CONCLUSION: Solid ovarian thecomas usually have typical sonographic features, which may be associated with degeneration but not with cellular composition within the tumor.
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Neoplasias Ováricas/diagnóstico por imagen , Neoplasias Ováricas/patología , Neoplasia Tecoma/diagnóstico por imagen , Neoplasia Tecoma/patología , Ultrasonografía Doppler en Color/métodos , Adulto , Anciano , Anciano de 80 o más Años , Antígeno Ca-125/sangre , Femenino , Humanos , Persona de Mediana Edad , Neoplasias Ováricas/sangre , Neoplasias Ováricas/clasificación , Estudios Retrospectivos , Neoplasia Tecoma/sangre , Neoplasia Tecoma/clasificación , Adulto JovenRESUMEN
OBJECTIVE: To evaluate prospectively the efficacy of ultrasonography (US), helical computed tomography (HCT), endoscopic ultrasonography (EUS) and magnetic resonance imaging (MRI) in the assessment of vascular invasion and lymph node metastasis in pancreatic carcinoma. METHODS: Consecutive 68 patients with pancreatic carcinoma were studied. Results of each imaging techniques regarding vascular invasion and lymph node metastasis were compared with the surgical and pathological findings. RESULTS: (1) US findings were confirmed moderately in accordance with surgical and pathological results in the evaluation of inferior cava vein, splenic artery and vein invasion of pancreatic carcinoma. HCT findings of evaluating superior mesenteric vein, portal vein, splenic vein were confirmed greatly in accordance with surgical and pathological results. The results of evaluating superior mesenteric artery, inferior cava vein, splenic artery, common hepatic artery, proper hepatic artery, celiac trunk, abdominal aorta were confirmed moderately in accordance with surgical and pathological results. MRI findings of evaluating superior mesenteric artery and vein, portal artery and vein were moderately in accordance with surgical and pathological results. EUS findings of evaluating splenic vein were confirmed greatly in accordance with surgical and pathological results, and moderately in accordance with surgical and pathological results in the evaluation of superior mesenteric vein. (2) EUS had the highest sensitivity (75.0%), accuracy (87.5%), and negative predictive values (91.7%) in the evaluation of lymph node metastasis. The sensitivity of HCT and MRI were 37.5% and 35.3%, which were significantly lower than that of EUS. The sensitivity of US was 18.7%, which was the lowest of all. In addition, the multivariate logistic regression analysis confirmed that EUS had an independent predictive value (OR: 34.50, 95%CI: 6.54 - 182.09). CONCLUSION: Helical CT should be considered the most precise technique to evaluate vascular invasion. EUS had an independent predictive value with respect to tumor metastasis to regional lymph nodes.
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Vasos Sanguíneos/patología , Endosonografía/métodos , Imagen por Resonancia Magnética/métodos , Neoplasias Pancreáticas/patología , Tomografía Computarizada Espiral/métodos , Ultrasonografía Doppler en Color/métodos , Anciano , Vasos Sanguíneos/diagnóstico por imagen , Femenino , Humanos , Metástasis Linfática , Masculino , Persona de Mediana Edad , Invasividad Neoplásica , Neoplasias Pancreáticas/diagnóstico por imagen , Neoplasias Pancreáticas/cirugía , Estudios ProspectivosRESUMEN
OBJECTIVE: To evaluate prospectively the efficacy and clinical significance of ultrasonography (US), helical computed tomography (HCT), endoscopic ultrasonography (EUS) and magnetic resonance imaging (MRI) in assessing locoregional invasion to the surrounding tissue or organs of primary pancreatic carcinoma. METHODS: Sixty-eight consecutive patients with pancreatic carcinoma underwent US, HCT, EUS and MRI examinations before surgical exploration. All imaging results in terms of tumor size and locoregional invasion were assessed separately by two diagnostic radiologists and compared with the surgical and pathological findings. RESULTS: Among the HCT, US, EUS and MRI examinations, EUS had the highest accuracy in assessing tumor size with a regression coefficient for the maximal and minimal diameter of 1.0250 (P = 0.0426) and 0.9873 (P < 0.0001), respectively. In the assessment of locoregional invasion to the surrounding tissue or organs, EUS also had the highest accuracy (75.8%) and sensitivity (80.0%), but MRI had the highest positive predicting value (97.4%). None of these four imaging techniques was significantly correlated with the surgical findings when analyzed by univariate logistic regression. CONCLUSION: Endoscopic ultrasonography may be the most useful imaging technique in assessing tumor size, but for assessing loco-regional invasion of primary pancreatic carcinoma, combination of more than one imaging techniques may be necessary.
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Diagnóstico por Imagen/métodos , Endosonografía , Invasividad Neoplásica/patología , Neoplasias Pancreáticas/patología , Carga Tumoral , Adulto , Anciano , Femenino , Humanos , Modelos Logísticos , Imagen por Resonancia Magnética , Masculino , Persona de Mediana Edad , Neoplasias Pancreáticas/diagnóstico por imagen , Neoplasias Pancreáticas/cirugía , Estudios Prospectivos , Cintigrafía , Tomografía Computarizada EspiralRESUMEN
OBJECTIVE: To analyze the cases of thyroid carcinoma with special sonographic features, so as to increase the accuracy of sonographic diagnosis for thyroid carcinoma. METHODS: The sonographic characteristics of 9 patients with special sonographic appearance were analyzed. According to the sonographic features, they were divided into two kinds: 8 cases suffered from thyroid diffuse malignant lesions, and one case showed cystic lesion sticking out of the thyroid. The sonographic appearance of gray scale and color Doppler characteristics of the lesions were recorded. RESULT: In the first kind of lesions, the dimensional ultrasound appearance of gray scale had an apparent feature, however, its color Doppler characteristics had no apparent feature, and all of the 8 cases were diagnosed correctly by ultrasound. In the second kind of lesion, the sonographic appearance of gray scale and color Doppler had no special features, so the case was diagnosed as benign disease wrongly by ultrasound. CONCLUSION: The first kind of lesions has apparent sonographic features, sonographic diagnosis can serve as the first choice. However, the second kind of lesion had no apparent sonographic feature.
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Glándula Tiroides/diagnóstico por imagen , Neoplasias de la Tiroides/diagnóstico por imagen , Humanos , Metástasis Linfática , Neoplasias de la Tiroides/clasificación , Neoplasias de la Tiroides/patología , Ultrasonografía Doppler en ColorRESUMEN
OBJECTIVE: To evaluate prospectively the efficacy and clinical significance of ultrasonography (US), multi-slice spiral CT (MSCT), magnetic resonance imaging (MRI), and endoscopic ultrasonography (EUS) in assessment of the TNM staging and resectability of pancreatic carcinoma. METHODS: Consecutive 68 patients with pancreatic carcinoma underwent US, MSCT, MRI, and EUS to assess their efficacies in assessment of the size of carcinoma, lymph node metastasis, and distant metastasis. The results of theses imaging techniques were compared with the surgical and pathological findings. RESULTS: EUS was the most precise technique in evaluating the T staging of pancreatic carcinoma with the coefficients of regression of maximum and minimum radii of 1.025 (P=0.043) and 0.987 (P<0.0001). In the assessment of lymph node metastasis, EUS had the highest sensitivity (75.0%), accuracy (87.5%), and negative predictive values (91.7%). Univariate logistic regression showed that EUS was significantly correlated with the surgical findings (OR: 33.00, 95%CI: 7.18-151.77 P<0.0001). Multivariate logistic regression analysis confirmed that EUS had an independent predictive value (OR: 34.50, 95%CI: 6.54-182.09, P<0.0001). MSCT had the highest sensibility (88.9%) in the assessment of distant metastasis and had the highest accuracy (61.8%) in preoperative TNM staging of pancreatic carcinoma. All 4 imaging techniques were correlated with surgical findings in assessment of the resectability. Multivariate logistic regression analysis confirmed that none of the imaging techniques had independent predictive value. CONCLUSION: MSCT is the best method in preoperative TNM staging of pancreatic carcinoma. EUS is the best methods in the assessment of tumor size and lymph node metastasis. Preoperative assessment of pancreatic carcinoma needs combination of at least two kinds of imaging techniques.
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Diagnóstico por Imagen/métodos , Neoplasias Pancreáticas/patología , Endosonografía , Humanos , Imagen por Resonancia Magnética , Metástasis de la Neoplasia , Estadificación de Neoplasias , Neoplasias Pancreáticas/diagnóstico por imagen , Tomografía Computarizada Espiral , Tomografía Computarizada por Rayos XRESUMEN
OBJECTIVE: To analyze ultrasonographic features of the different kinds of cervical cystic lesions, and propose differential diagnostic standard for these lesions based on the evidence of high resolution ultrasonography. METHODS: The clinical data of 107 patients with different kinds of cervical cystic lesions were analyzed. The role of gray scale and colour Doppler sonography for such lesions was prospectively studied. RESULTS: The rate of accuracy for benign cervical cystic lesions was 91.1% (92/101), however, it was only 16.7% (1/6) for malignant cervical cystic lesions. CONCLUSION: High-resolution ultrasonography is effective and simple in differential diagnosis of different kinds of cervical cystic lesions, especially for benign ones.
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Branquioma/diagnóstico por imagen , Neoplasias de Cabeza y Cuello/diagnóstico por imagen , Hemangioma/diagnóstico por imagen , Linfangioma Quístico/diagnóstico por imagen , Quiste Tirogloso/diagnóstico por imagen , Ultrasonografía Doppler en Color/métodos , Adolescente , Adulto , Anciano , Diagnóstico Diferencial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Reproducibilidad de los ResultadosRESUMEN
OBJECTIVE: To assess the effect of ultrasonography and computerized tomography (CT) in the diagnosis of large upper abdominal mass. METHODS: Data from 43 cases that were clinically and pathologically confirmed were retrospectively analyzed and the effect of their preoperative ultrasonography and CT was compared. RESULTS: Four of 10 (40 percent) cases of liver mass were diagnosed correctly using ultrasonic device, nineteen of 25 (76 percent) cases of adrenal gland mass and 2 of 4 cases of kidney mass. Two of 10 (20 percent) cases of liver mass were correctly diagnosed by CT, and so were 6 of 22 (27.2 percent) cases of adrenal gland mass. In 4 patients with spleen mass, neither ultrasonography nor CT diagnosis was correct. CONCLUSION: Because upper abdomen organs are closely connected with each other, correct imaging localization of a large mass in this region is not easy. In this study, we compared the accuracy of ultrasonography and CT in diagnosing large upper abdominal masses, and found that ultrasonography works better for adrenal rather than liver or kidney. Neither ultrasonography or CT could accurately diagnose a large mass in the spleen.
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Neoplasias Abdominales/diagnóstico , Tomografía Computarizada por Rayos X , Neoplasias Abdominales/diagnóstico por imagen , Neoplasias Abdominales/patología , Adulto , Anciano , Errores Diagnósticos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , UltrasonografíaRESUMEN
OBJECTIVE: To analyse the features of gray scale and colour Doppler sonography for carotid body tumor, to improve the sonographic diagnostic accuracy. METHODS: A retrospective review was performed of sonographic material of 18 carotid body tumors by gray scale sonography and 11 by colour Doppler sonography, with comparison with other diseases which are frequently misdiagnosed as carotid tumor. RESULTS: Well-defined, even weakly hypoechoic masses were noted on gray scale ultrasonogram at the carotid bifurcation, commonly broadening the carotid bifurcation and often encasing the common, external and internal carotid arteries. Disorderly non-echoic channel- like structures in the tumor were sometimes observed. Colour Doppler sonography showed abundant flow in the tumor. The non-echoic channel- like structures were vascularities. Seventeen masses diagnosed by ultrasound were proved to be carotid body tumors. The other was confirmed as a neurogenic tumor, giving an accuracy rate of 94.4% for sonographic diagnosis. CONCLUSION: Sonographic examination of the carotid body tumor is highly accurate. It is safe and reliable.
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Tumor del Cuerpo Carotídeo/diagnóstico por imagen , Ultrasonografía Doppler en Color , Adulto , Anciano , Diagnóstico Diferencial , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Sensibilidad y EspecificidadRESUMEN
Papillary thyroid microcarcinoma (PTMC) is a malignant thyroid tumor of less than 1 cm in size. Ultrasound (US) is the preferred imaging modality for PTMC. This study retrospectively evaluated the US results from 113 consecutive cases of PTMC with 127 nodules and correlated the results with the histopathologic findings. The results showed none of the PTMC nodules had a cystic element. Half of the PTMC nodules had a well-defined boundary and the remaining half had an ill-defined boundary. A percent (6.3%) of the nodules had a halo sign. Microcalcification was present in approximately half of the PTMC nodules. The cancerous tissue with a papillary structure was hypoechogenic and the amount of fibrous stroma determined whether the nodule echogenicity was heterogeneous or homogeneous. Heterogeneous echogenicity was associated with a fibrous stroma proportion of >20%. Only PTMC nodules with predominantly follicular structures containing a large proportion of colloid demonstrated isoechogenicity. Well-defined boundaries on US were associated with well-defined histologic margins, with or without the presence of an intact fibrous pseudo-capsule. A halo sign with a well-defined boundary detected by US was associated with the presence of an intact fibrous pseudo-capsule. Half of the PTMC nodules with ill-defined boundaries exhibited infiltration into the surrounding thyroid tissue, while the remaining half of the PTMC nodules with ill-defined boundaries on US presented irregular nodule margins by histology, rather than nodule infiltration. Psammoma bodies detected at a frequency ≥5 per ×200 microscopic field of view were detectable on US as microcalcifications.
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Carcinoma Papilar/diagnóstico por imagen , Carcinoma Papilar/patología , Neoplasias de la Tiroides/diagnóstico por imagen , Neoplasias de la Tiroides/patología , Ultrasonografía/métodos , Adolescente , Adulto , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Sensibilidad y Especificidad , Estadística como Asunto , Adulto JovenRESUMEN
Our purpose was to study the accuracy of using endorectal ultrasonography (ERUS) with sterile coupling gels filling the rectum in the preoperative T-staging of rectal carcinoma. A total of 189 patients with confirmed rectal carcinoma were recruited. All underwent ERUS and surgery within the week following sonography. EURS was performed by introducing sterile coupling gel into the rectum. Two radiologists looked at the images at the same time and agreed upon staging. Rectal carcinoma was staged from Tis to T4. The accuracy of T-staging by ERUS was 89.95%. The sensitivity, specificity, PPV and NPV for ERUS at different stages were calculated. For early stage (Tis and T1), these values were 93.62%, 97.89%, 93.62% and 97.89%, respectively. ERUS filling with sterile coupling gel in the rectum overcomes the pressure effect from a water bath and the restriction caused by tumor stenosis, thus, greatly improving the accuracy of T-staging. The examination is real-time, safe and inexpensive.