Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 39
Filtrar
2.
JAMA Oncol ; 9(2): 225-233, 2023 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-36520422

RESUMO

Importance: Correct diagnosis of ovarian cancer results in better prognosis. Adnexal lesions can be stratified into the Ovarian-Adnexal Reporting and Data System (O-RADS) risk of malignancy categories with either the O-RADS lexicon, proposed by the American College of Radiology, or the International Ovarian Tumor Analysis (IOTA) 2-step strategy. Objective: To investigate the diagnostic performance of the O-RADS lexicon and the IOTA 2-step strategy. Design, Setting, and Participants: Retrospective external diagnostic validation study based on interim data of IOTA5, a prospective international multicenter cohort study, in 36 oncology referral centers or other types of centers. A total of 8519 consecutive adult patients presenting with an adnexal mass between January 1, 2012, and March 1, 2015, and treated either with surgery or conservatively were included in this diagnostic study. Twenty-five patients were excluded for withdrawal of consent, 2777 were excluded from 19 centers that did not meet predefined data quality criteria, and 812 were excluded because they were already in follow-up at recruitment. The analysis included 4905 patients with a newly detected adnexal mass in 17 centers that met predefined data quality criteria. Data were analyzed from January 31 to March 1, 2022. Exposures: Stratification into O-RADS categories (malignancy risk <1%, 1% to <10%, 10% to <50%, and ≥50%). For the IOTA 2-step strategy, the stratification is based on the individual risk of malignancy calculated with the IOTA 2-step strategy. Main Outcomes and Measures: Observed prevalence of malignancy in each O-RADS risk category, as well as sensitivity and specificity. The reference standard was the status of the tumor at inclusion, determined by histology or clinical and ultrasonographic follow-up for 1 year. Multiple imputation was used for uncertain outcomes owing to inconclusive follow-up information. Results: Median age of the 4905 patients was 48 years (IQR, 36-62 years). Data on race and ethnicity were not collected. A total of 3441 tumors (70%) were benign, 978 (20%) were malignant, and 486 (10%) had uncertain classification. Using the O-RADS lexicon resulted in 1.1% (24 of 2196) observed prevalence of malignancy in O-RADS 2, 4% (34 of 857) in O-RADS 3, 27% (246 of 904) in O-RADS 4, and 78% (732 of 939) in O-RADS 5; the corresponding results for the IOTA 2-step strategy were 0.9% (18 of 1984), 4% (58 of 1304), 30% (206 of 690), and 82% (756 of 927). At the 10% risk threshold (O-RADS 4-5), the O-RADS lexicon had 92% sensitivity (95% CI, 87%-96%) and 80% specificity (95% CI, 74%-85%), and the IOTA 2-step strategy had 91% sensitivity (95% CI, 84%-95%) and 85% specificity (95% CI, 80%-88%). Conclusions and Relevance: The findings of this external diagnostic validation study suggest that both the O-RADS lexicon and the IOTA 2-step strategy can be used to stratify patients into risk groups. However, the observed malignancy rate in O-RADS 2 was not clearly below 1%.


Assuntos
Doenças dos Anexos , Neoplasias Ovarianas , Adulto , Feminino , Humanos , Pessoa de Meia-Idade , Estudos de Coortes , Estudos Retrospectivos , Estudos Prospectivos , Ultrassonografia/métodos , Neoplasias Ovarianas/diagnóstico por imagem , Neoplasias Ovarianas/epidemiologia , Doenças dos Anexos/diagnóstico , Doenças dos Anexos/epidemiologia , Doenças dos Anexos/patologia , Fatores de Risco , Sensibilidade e Especificidade
3.
Elife ; 102021 12 31.
Artigo em Inglês | MEDLINE | ID: mdl-34970966

RESUMO

Activation of T cells requires a rapid surge in cellular protein synthesis. However, the role of translation initiation in the early induction of specific genes remains unclear. Here, we show human translation initiation factor eIF3 interacts with select immune system related mRNAs including those encoding the T cell receptor (TCR) subunits TCRA and TCRB. Binding of eIF3 to the TCRA and TCRB mRNA 3'-untranslated regions (3'-UTRs) depends on CD28 coreceptor signaling and regulates a burst in TCR translation required for robust T cell activation. Use of the TCRA or TCRB 3'-UTRs to control expression of an anti-CD19 chimeric antigen receptor (CAR) improves the ability of CAR-T cells to kill tumor cells in vitro. These results identify a new mechanism of eIF3-mediated translation control that can aid T cell engineering for immunotherapy applications.


Assuntos
Fator de Iniciação 3 em Eucariotos/genética , Ativação Linfocitária/genética , Receptores de Antígenos de Linfócitos T/imunologia , Linfócitos T/imunologia , Linhagem Celular , Fator de Iniciação 3 em Eucariotos/metabolismo , Humanos
4.
Diagnostics (Basel) ; 11(4)2021 Mar 24.
Artigo em Inglês | MEDLINE | ID: mdl-33805053

RESUMO

The aim of the study was to evaluate the usefulness of 4D Power Doppler tissue evaluation to discriminate between normal ovaries and ovarian cancer tumors. This was a prospective observational study. Twenty-three cases of surgically confirmed ovarian High Grade Serous Carcinoma (HGSC) were analyzed. The control group consisted of 23 healthy patients, each matching their study-group counterpart age wise (±3 years) and according to their menopausal status. Transvaginal Doppler 4D ultrasound scans were done on every patient and analyzed with 3D/4D software. Two 4D indices-volumetric Systolic/Diastolic Index (vS/D) and volumetric Pulsatility Index (vPI)-were calculated. To keep results standardized and due to technical limitations, virtual 1cc spherical tissue samples taken from the part with highest vascularization as detected by bi-directional Power Doppler were analyzed for both groups of ovaries. Values of volumetric S/D indices and volumetric PI indices were statistically lower in ovarian malignant tumors compared to normal ovaries: 1.096 vs. 1.794 and 0.092 vs. 0.558, respectively (p < 0.001). The 4D bi-directional Power Doppler vascular indices were statistically different between malignant tumors and normal ovaries. These findings could support the rationale for future studies for assessing this technology to discriminate between malignant and benign tumors.

5.
BMJ ; 370: m2614, 2020 07 30.
Artigo em Inglês | MEDLINE | ID: mdl-32732303

RESUMO

OBJECTIVE: To evaluate the performance of diagnostic prediction models for ovarian malignancy in all patients with an ovarian mass managed surgically or conservatively. DESIGN: Multicentre cohort study. SETTING: 36 oncology referral centres (tertiary centres with a specific gynaecological oncology unit) or other types of centre. PARTICIPANTS: Consecutive adult patients presenting with an adnexal mass between January 2012 and March 2015 and managed by surgery or follow-up. MAIN OUTCOME MEASURES: Overall and centre specific discrimination, calibration, and clinical utility of six prediction models for ovarian malignancy (risk of malignancy index (RMI), logistic regression model 2 (LR2), simple rules, simple rules risk model (SRRisk), assessment of different neoplasias in the adnexa (ADNEX) with or without CA125). ADNEX allows the risk of malignancy to be subdivided into risks of a borderline, stage I primary, stage II-IV primary, or secondary metastatic malignancy. The outcome was based on histology if patients underwent surgery, or on results of clinical and ultrasound follow-up at 12 (±2) months. Multiple imputation was used when outcome based on follow-up was uncertain. RESULTS: The primary analysis included 17 centres that met strict quality criteria for surgical and follow-up data (5717 of all 8519 patients). 812 patients (14%) had a mass that was already in follow-up at study recruitment, therefore 4905 patients were included in the statistical analysis. The outcome was benign in 3441 (70%) patients and malignant in 978 (20%). Uncertain outcomes (486, 10%) were most often explained by limited follow-up information. The overall area under the receiver operating characteristic curve was highest for ADNEX with CA125 (0.94, 95% confidence interval 0.92 to 0.96), ADNEX without CA125 (0.94, 0.91 to 0.95) and SRRisk (0.94, 0.91 to 0.95), and lowest for RMI (0.89, 0.85 to 0.92). Calibration varied among centres for all models, however the ADNEX models and SRRisk were the best calibrated. Calibration of the estimated risks for the tumour subtypes was good for ADNEX irrespective of whether or not CA125 was included as a predictor. Overall clinical utility (net benefit) was highest for the ADNEX models and SRRisk, and lowest for RMI. For patients who received at least one follow-up scan (n=1958), overall area under the receiver operating characteristic curve ranged from 0.76 (95% confidence interval 0.66 to 0.84) for RMI to 0.89 (0.81 to 0.94) for ADNEX with CA125. CONCLUSIONS: Our study found the ADNEX models and SRRisk are the best models to distinguish between benign and malignant masses in all patients presenting with an adnexal mass, including those managed conservatively. TRIAL REGISTRATION: ClinicalTrials.gov NCT01698632.


Assuntos
Neoplasias das Tubas Uterinas/diagnóstico , Neoplasias das Tubas Uterinas/patologia , Modelos Logísticos , Neoplasias Ovarianas/diagnóstico , Neoplasias Ovarianas/patologia , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Antígeno Ca-125/sangue , Calibragem , Tratamento Conservador , Neoplasias das Tubas Uterinas/terapia , Feminino , Humanos , Proteínas de Membrana/sangue , Pessoa de Meia-Idade , Neoplasias Ovarianas/terapia , Ovariectomia , Estudos Prospectivos , Medição de Risco/métodos , Ultrassonografia , Adulto Jovem
6.
Wiad Lek ; 72(9 cz 2): 1834-1838, 2019.
Artigo em Polonês | MEDLINE | ID: mdl-31622275

RESUMO

The adipose and osseous tissue, although both derived from the connective tissues, perform different functions. In the common opinion, obesity might be a protective factor against bone loss and osteoporosis. The adipose tissue is a recognized major endocrine organ, producing a number of active biological substances, which affect the bone mass. Adipocyte and osteoblast are derived from the same mesenchymal stem cells. Therefore abnormal secretion of adipocytokines may play an important role not only in pathogenesis of the obesity, but also can influence the bone . It is supposed that obesity might have a protective effect on bone tissue in postmenopausal women, by increasing the load on the axial skeleton and because of its hormonal activity.


Assuntos
Tecido Adiposo/fisiopatologia , Osso e Ossos/fisiopatologia , Obesidade/patologia , Osteoporose/patologia , Adipocinas/fisiologia , Densidade Óssea , Feminino , Humanos , Células-Tronco Mesenquimais
7.
Clin Cancer Res ; 25(16): 5107-5121, 2019 08 15.
Artigo em Inglês | MEDLINE | ID: mdl-31164374

RESUMO

PURPOSE: Small-cell lung cancer (SCLC) has been treated clinically as a homogeneous disease, but recent discoveries suggest that SCLC is heterogeneous. Whether metabolic differences exist among SCLC subtypes is largely unexplored. In this study, we aimed to determine whether metabolic vulnerabilities exist between SCLC subtypes that can be therapeutically exploited. EXPERIMENTAL DESIGN: We performed steady state metabolomics on tumors isolated from distinct genetically engineered mouse models (GEMM) representing the MYC- and MYCL-driven subtypes of SCLC. Using genetic and pharmacologic approaches, we validated our findings in chemo-naïve and -resistant human SCLC cell lines, multiple GEMMs, four human cell line xenografts, and four newly derived PDX models. RESULTS: We discover that SCLC subtypes driven by different MYC family members have distinct metabolic profiles. MYC-driven SCLC preferentially depends on arginine-regulated pathways including polyamine biosynthesis and mTOR pathway activation. Chemo-resistant SCLC cells exhibit increased MYC expression and similar metabolic liabilities as chemo-naïve MYC-driven cells. Arginine depletion with pegylated arginine deiminase (ADI-PEG 20) dramatically suppresses tumor growth and promotes survival of mice specifically with MYC-driven tumors, including in GEMMs, human cell line xenografts, and a patient-derived xenograft from a relapsed patient. Finally, ADI-PEG 20 is significantly more effective than the standard-of-care chemotherapy. CONCLUSIONS: These data identify metabolic heterogeneity within SCLC and suggest arginine deprivation as a subtype-specific therapeutic vulnerability for MYC-driven SCLC.


Assuntos
Arginina/metabolismo , Metabolismo Energético , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/metabolismo , Proteínas Proto-Oncogênicas c-myc/genética , Carcinoma de Pequenas Células do Pulmão/genética , Carcinoma de Pequenas Células do Pulmão/metabolismo , Animais , Linhagem Celular Tumoral , Modelos Animais de Doenças , Humanos , Neoplasias Pulmonares/diagnóstico por imagem , Neoplasias Pulmonares/patologia , Redes e Vias Metabólicas , Camundongos , Camundongos Transgênicos , Modelos Biológicos , Transdução de Sinais , Carcinoma de Pequenas Células do Pulmão/diagnóstico por imagem , Carcinoma de Pequenas Células do Pulmão/patologia , Serina-Treonina Quinases TOR/metabolismo , Ensaios Antitumorais Modelo de Xenoenxerto
8.
Lancet Oncol ; 20(3): 448-458, 2019 03.
Artigo em Inglês | MEDLINE | ID: mdl-30737137

RESUMO

BACKGROUND: Ovarian tumours are usually surgically removed because of the presumed risk of complications. Few large prospective studies on long-term follow-up of adnexal masses exist. We aimed to estimate the cumulative incidence of cyst complications and malignancy during the first 2 years of follow-up after adnexal masses have been classified as benign by use of ultrasonography. METHODS: In the international, prospective, cohort International Ovarian Tumor Analysis Phase 5 (IOTA5) study, patients aged 18 years or older with at least one adnexal mass who had been selected for surgery or conservative management after ultrasound assessment were recruited consecutively from 36 cancer and non-cancer centres in 14 countries. Follow-up of patients managed conservatively is ongoing at present. In this 2-year interim analysis, we analysed patients who were selected for conservative management of an adnexal mass judged to be benign on ultrasound on the basis of subjective assessment of ultrasound images. Conservative management included ultrasound and clinical follow-up at intervals of 3 months and 6 months, and then every 12 months thereafter. The main outcomes of this 2-year interim analysis were cumulative incidence of spontaneous resolution of the mass, torsion or cyst rupture, or borderline or invasive malignancy confirmed surgically in patients with a newly diagnosed adnexal mass. IOTA5 is registered with ClinicalTrials.gov, number NCT01698632, and the central Ethics Committee and the Belgian Federal Agency for Medicines and Health Products, number S51375/B32220095331, and is ongoing. FINDINGS: Between Jan 1, 2012, and March 1, 2015, 8519 patients were recruited to IOTA5. 3144 (37%) patients selected for conservative management were eligible for inclusion in our analysis, of whom 221 (7%) had no follow-up data and 336 (11%) were operated on before a planned follow-up scan was done. Of 2587 (82%) patients with follow-up data, 668 (26%) had a mass that was already in follow-up at recruitment, and 1919 (74%) presented with a new mass at recruitment (ie, not already in follow-up in the centre before recruitment). Median follow-up of patients with new masses was 27 months (IQR 14-38). The cumulative incidence of spontaneous resolution within 2 years of follow-up among those with a new mass at recruitment (n=1919) was 20·2% (95% CI 18·4-22·1), and of finding invasive malignancy at surgery was 0·4% (95% CI 0·1-0·6), 0·3% (<0·1-0·5) for a borderline tumour, 0·4% (0·1-0·7) for torsion, and 0·2% (<0·1-0·4) for cyst rupture. INTERPRETATION: Our results suggest that the risk of malignancy and acute complications is low if adnexal masses with benign ultrasound morphology are managed conservatively, which could be of value when counselling patients, and supports conservative management of adnexal masses classified as benign by use of ultrasound. FUNDING: Research Foundation Flanders, KU Leuven, Swedish Research Council.


Assuntos
Doenças dos Anexos/tratamento farmacológico , Diagnóstico Diferencial , Neoplasias/tratamento farmacológico , Neoplasias Ovarianas/tratamento farmacológico , Doenças dos Anexos/diagnóstico , Doenças dos Anexos/patologia , Doenças dos Anexos/cirurgia , Adolescente , Adulto , Idoso , Estudos de Coortes , Feminino , Humanos , Pessoa de Meia-Idade , Neoplasias/diagnóstico , Neoplasias/patologia , Neoplasias/cirurgia , Neoplasias Ovarianas/diagnóstico , Neoplasias Ovarianas/patologia , Neoplasias Ovarianas/cirurgia , Estudos Prospectivos , Fatores de Risco , Ultrassonografia , Adulto Jovem
9.
Endokrynol Pol ; 70(3): 219-223, 2019.
Artigo em Inglês | MEDLINE | ID: mdl-30633319

RESUMO

INTRODUCTION: 4D Ultrasound technology merging the Power Doppler option called High-Definition Flow (HDF) with Spatio-Temporal Image Correlation (STIC) is used in gynaecology and obstetrics. It seems to be a promising tool in assessing tissue vascularisation. The aim of the paper was to assess whether HDF STIC technique could be a useful tool for the evaluation of gastro-entero-pancreatic neuroendocrine neoplasm (GEP-NEN) advancement. MATERIAL AND METHODS: Forty-eight patients [mean age 57.7 ± 10.3 years; male 40.9% (n = 18)] diagnosed with metastatic GEP-NENs were included in the analysis. All subjects were enrolled in the Department of Endocrinology and Neuroendocrine Tumours, Medical University of Silesia, Katowice. We analysed liver metastases. Patients with G3 grading or faintly vascularised lesions were excluded. HDF STIC volumes were acquired during USG examination. 4D indices [volumetric pulsatility index (vPI) and volumetric systolic/diastolic index (vS/D)] were calculated using dedicated software. RESULTS: There were no correlations between vS/D and Ki-67 [p = 0.67; r = -0.19; (-0.28-0.19)], CgA [p = 0.47; r = -0.11; (-0.38-0,19)], 5-HIAA [p = 0.52; r = -0.09 (-0.37-0.2)], serotonin [p = 0.83; r = -0.03 (-0.32-0.26)], and VCAM-1 (p = 0.62; r = 0.09 (-03-0.47)]. The were no correlations between vPI and Ki-67 [p = 0.29; r = -0.16 (-0.45-0.14)], CgA (p = 0.46; r = -0.11 (-0.39-0.19)], 5-HIAA [p = 0.52; r = -0.09 (-0.37-0.2)], serotonin [p = 0.82; r = -0.03 (-0.32-0.26)], and VCAM-1 (p = 0.62; r = -0.09 (-03-0.47)]. There was no significant difference between carcinoid versus non-carcinoid patients if compared by vS/D and vPI (p = 0.62, p = 0.61, respectively). CONCLUSIONS: HDF STIC seems not to be an efficient marker to assess advancement of NENs, due to lack of correlation with widely used and approved markers of progression.


Assuntos
Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/secundário , Neovascularização Patológica/diagnóstico por imagem , Tumores Neuroendócrinos/diagnóstico , Tumores Neuroendócrinos/secundário , Ultrassonografia , Idoso , Feminino , Humanos , Neoplasias Hepáticas/diagnóstico por imagem , Masculino , Pessoa de Meia-Idade , Tumores Neuroendócrinos/diagnóstico por imagem , Estudos Prospectivos
10.
Endokrynol Pol ; 69(4)2018.
Artigo em Inglês | MEDLINE | ID: mdl-30209800

RESUMO

Polycystic ovary syndrome (PCOS) diagnosis and therapy still arouse a lot of controversy. Each year brings new information, so, having collected the experience of three scientific societies, we present contemporary recommendations concerning PCOS diagnostics and treat-ment. In adult female diagnosis, we still use the Rotterdam criteria, which is two out of three of the follwing characteristics: a) ovulation abnormality, b) clinical or biochemical hyperandrogenism, and c) polycystic ovaries. In the case of teenagers, diagnostic criteria are as follows: menstruation disturbances two years after menarche and clinical or biochemical hyperandrogenism. The presence of polycysti-cally abnormal ovaries is not necessary. The consensus paper presents the threats resulting from imperfect diagnostic methods applied in PCOS (hyperandrogenism diagnostics, ultrasound examination of ovaries). Suggested therapy includes personalised schemes according to the dominant PCOS phenotype, i.e. metabolic, hyperandrogenic, or reproductive ones.


Assuntos
Síndrome do Ovário Policístico/diagnóstico , Síndrome do Ovário Policístico/terapia , Sociedades Médicas , Adolescente , Adulto , Endocrinologia , Feminino , Ginecologia , Humanos , Polônia , Adulto Jovem
11.
Wiad Lek ; 71(8): 1628-1631, 2018.
Artigo em Polonês | MEDLINE | ID: mdl-30684351

RESUMO

Elderly people more often suffer from vitamin D insufficiency. It is caused by insufficient supply with diet and scarce sun exposure, due to life style. This is a very common situation in Poland and worldwide. Vitamin D influences functioning of many various organs. Its deficiency may cause bone mineralization disorders, osteomalacia, osteoporosis, muscle weakening, which can result in higher risk of falls. Its influence on cardiovascular diseases, type 2 diabetes and cognitive functions is widely discussed. Supplementation is crucial in elderly population. It should be administrated all year, with adjustement of dose to age and weight. Initial blood concentration is not required. An appropriate sun exposure is recommended. Treatment of vitamin D deficiency should be intensive and last for several months. Although the doses are high, no adverse effects were observed.


Assuntos
Deficiência de Vitamina D/complicações , Vitamina D/uso terapêutico , Idoso , Doenças Cardiovasculares/complicações , Diabetes Mellitus Tipo 2/complicações , Humanos , Osteomalacia/complicações , Osteoporose/complicações , Polônia , Vitamina D/administração & dosagem , Vitaminas
12.
J Ultrasound Med ; 37(1): 255-261, 2018 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-28736982

RESUMO

OBJECTIVES: Although power Doppler imaging has been used to quantify tissue and organ vascularity, many studies showed that limitations in defining adequate ultrasound machine settings and attenuation make such measurements complex to be achieved. However, most of these studies were conducted by using the output of proprietary software, such as Virtual Organ computer-aided analysis (GE Healthcare, Kretz, Zipf, Austria); therefore, many conclusions may not be generalizable because of unknown settings and parameters used by the software. To overcome this limitation, our goal was to evaluate the impact of the flow velocity, pulse repetition frequency (PRF), and wall motion filter (WMF) on power Doppler image quantification using beam-formed ultrasonic radiofrequency data. METHODS: The setup consisted of a blood-mimicking fluid flowing through a phantom. Radiofrequency signals were collected using PRFs ranging from 0.6 to 10 kHz for 6 different flow velocities (5-40 cm/s). Wall motion filter cutoff frequencies were varied between 50 and 250 Hz. RESULTS: The power Doppler magnitude was deeply influenced by the WMF cutoff frequency. The effect of using different WMF values varied with the PRF; therefore, the power Doppler signal intensity was dependent on the PRF. Finally, we verified that power Doppler quantification can be affected by the aliasing effect, especially when using a PRF lower than 1.3 kHz. CONCLUSIONS: The WMF and PRF greatly influenced power Doppler quantification, mainly when flow velocities lower than 20 cm/s were used. Although the experiments were conducted in a nonclinical environment, the evaluated parameters are equivalent to those used in clinical practice, which makes them valuable for aiding the interpretation of related data in future research.


Assuntos
Velocidade do Fluxo Sanguíneo , Vasos Sanguíneos/diagnóstico por imagem , Interpretação de Imagem Assistida por Computador/métodos , Imageamento Tridimensional/métodos , Ultrassonografia Doppler/métodos , Modelos Biológicos , Movimento (Física) , Imagens de Fantasmas , Reprodutibilidade dos Testes
13.
J Ultrasound Med ; 35(11): 2389-2395, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27629761

RESUMO

OBJECTIVES: To assess whether strain elastography may be used to visualize the different stiffness of endometrial polyps and submucosal fibroids. METHODS: We conducted a prospective monocentric single-operator study on diagnostic accuracy. Patients who qualified for hysteroscopy because of suspected endometrial polyps and submucosal fibroids were included. Before the procedure, all patients underwent routine sonographic and power Doppler examinations. Additionally, the stiffness of intrauterine lesions was assessed by strain elastography. The enhancement was adjusted to visualize hard myometrium and soft endometrium around the intrauterine lesion. Due to their histologic structure, we assumed that on strain elastography, endometrial polyps should appear as soft lesions, whereas submucosal fibroids should appear as hard lesions. Sonographic, power Doppler, and elastographic findings were verified by pathologic examinations after hysteroscopies. The diagnostic accuracy of sonography, power Doppler imaging, and strain elastography was compared by the McNemar test. RESULTS: Forty-seven patients were included and underwent hysteroscopy. In 29 cases, endometrial polyps were found, and in 18, submucosal fibroids were found. The diagnostic accuracy rates for B-mode sonography, power Doppler imaging, and strain elastography in distinguishing endometrial polyps and submucosal fibroids were 70.2%, 65.9%, and 89.4%, respectively. The proportion of correct findings was significantly higher for strain elastography than for B-mode sonography (P = .0265) and power Doppler imaging (P = .0153). CONCLUSIONS: Strain elastography complements sonography in differentiating intrauterine lesions. Strain elastography may be used to visualize the different stiffness of endometrial polyps and submucosal fibroids.


Assuntos
Técnicas de Imagem por Elasticidade , Neoplasias do Endométrio/diagnóstico por imagem , Leiomioma/diagnóstico por imagem , Pólipos/diagnóstico por imagem , Neoplasias Uterinas/diagnóstico por imagem , Adulto , Diagnóstico Diferencial , Endométrio/diagnóstico por imagem , Feminino , Humanos , Pessoa de Meia-Idade , Estudos Prospectivos , Reprodutibilidade dos Testes
14.
Ultrasound Med Biol ; 42(12): 2887-2892, 2016 12.
Artigo em Inglês | MEDLINE | ID: mdl-27680571

RESUMO

Three-dimensional power Doppler quantification has limited application because of its high dependency on attenuation. The purpose of the study described here was to assess if different degrees of attenuation, depending on pulse repetition frequency (PRF) adjustment, alter 3-D power Doppler quantification in a region of 100% moving blood when using vascularization index, flow index and vascularization flow index (VFI). A cubic-shaped gelatin phantom with a 1.8-mm-internal-diameter silicon tube was used. The tube, placed at 45° to the phantom's surface, was filled with blood-mimicking fluid with as constant maximum velocity of 30 cm/s. Two different attenuation blocks (low and high attenuation) were alternatively placed between the phantom and the transvaginal transducer. One single observer acquired 10 data sets for each PRF level from 0.3 to 7.5 kHz, using the high- and low-attenuation blocks, for a total of 200 3-D power Doppler data sets. We assessed VFI from 1.5-mm-diameter spherical samples, virtually placed inside the tube, always at the same position. No difference was noted between high- and low-attenuation VFI values when using a PRF of 0.3 kHz. As PRF increased, it was observed that VFI quantification progressively differed between low and high attenuation. Also, a slope on VFI values for both high- and low-attenuation models could be observed when increasing PRF, particularly above 4.0 kHz. We concluded that PRF adjustment is very relevant when using VFI to quantify 3-D power Doppler signal.


Assuntos
Interpretação de Imagem Assistida por Computador/métodos , Imageamento Tridimensional/métodos , Ultrassonografia Doppler/métodos , Imagens de Fantasmas
15.
Med Ultrason ; 18(3): 397-9, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27622419

RESUMO

Proximal Femoral Focal Deficiency (PFFD) is a rare congenital syndrome of unknown etiology. Additional disorders can be present up to 70% of PFFD cases. Management (including termination) depends on the severity of the malformation. We present a case of a 32-year-old woman referred for routine ultrasound examination in the 12th week of pregnancy. Detailed 3D/4D evaluation revealed asymmetry of lower limbs and diagnosis of isolated PFFD was established. Parents were fully informed and decided to continue the pregnancy. We stress here the importance of early 3D/4D ultrasound diagnosis. Our paper presents the earliest case where the diagnosis of PFFD was established with 3D/4D ultrasound.


Assuntos
Fêmur/anormalidades , Fêmur/diagnóstico por imagem , Imageamento Tridimensional/métodos , Ultrassonografia Pré-Natal/métodos , Adulto , Feminino , Humanos , Recém-Nascido , Gravidez
16.
Methods Mol Biol ; 1421: 127-35, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-26965262

RESUMO

Determination of mRNA translation rates is essential to understanding the regulatory pathways governing eukaryotic gene expression. In this chapter, we present a transcriptome-wide method to assess translation by association of mRNAs with polysomes on sucrose density gradients. After sedimentation, the fractions are spiked with a control RNA mixture and the RNA content is measured by high-throughput sequencing. Normalization to the spike-ins provides a global quantitative view on the translational status of cellular mRNAs, with the ability to measure changes and identify active and silent subpopulations of each.


Assuntos
Polirribossomos/genética , RNA Mensageiro/genética , Centrifugação com Gradiente de Concentração/métodos , Células HEK293 , Sequenciamento de Nucleotídeos em Larga Escala/métodos , Humanos , Biossíntese de Proteínas , Análise de Sequência de RNA/métodos , Transcriptoma
17.
Ultrasound Med Biol ; 42(2): 447-50, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26610712

RESUMO

We aimed to evaluate the agreement of results obtained by 4-D spatio-temporal image correlation (STIC) angiography with two options of Doppler technology (power Doppler [PD] and high-definition flow [HDF]) from an ovary as an in vivo model. Thirty-eight ovaries were recorded by trans-vaginal ultrasound examination in the first part of the menstrual cycle. Two STIC sequences (4-D HDF and 4-D PD) were stored. Volumetric pulsatility index, volumetric resistance index and volumetric systolic/diastolic index for each of these sequences were calculated, and their mean values were compared and correlated. Agreement between 4-D HDF and 4-D PD was assessed using the intra-class correlation coefficient. Intra-class correlation coefficients for all three indices were high, but 95% confidence intervals and limits of agreement were wide. We conclude that both 4-D power Doppler and 4-D high-definition flow may be used for calculating volumetric pulsatility index, volumetric resistance index and volumetric systolic/diastolic index from a STIC sequence, at least in ovaries used as an in vivo model. However, values obtained by both methods cannot be used interchangeably.


Assuntos
Velocidade do Fluxo Sanguíneo/fisiologia , Ecocardiografia Doppler/métodos , Ecocardiografia Quadridimensional/métodos , Interpretação de Imagem Assistida por Computador/métodos , Ovário/diagnóstico por imagem , Ovário/fisiopatologia , Adulto , Angiografia/métodos , Feminino , Humanos , Ovário/irrigação sanguínea , Reprodutibilidade dos Testes , Sensibilidade e Especificidade
18.
Fertil Steril ; 104(3): 688-97.e8, 2015 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-26158905

RESUMO

OBJECTIVE: To estimate the inter-rater/intrarater reliability of the European Society of Human Reproduction and Embryology/European Society for Gynaecological Endoscopy (ESHRE-ESGE) classification of congenital uterine malformations and to compare the results obtained with the reliability of the American Society for Reproductive Medicine (ASRM) classification supplemented with additional morphometric criteria. DESIGN: Reliability/agreement study. SETTING: Private clinic. PATIENT(S): Uterine malformations (n = 50 patients, consecutively included) and normal uterus (n = 62 women, randomly selected) constituted the study. These were classified based on real-time three-dimensional ultrasound single volume transvaginal (or transrectal in the case of virgins, 4 cases) ultrasonography findings, which were assessed by an expert rater based on the ESHRE-ESGE criteria. The samples were obtained from women of reproductive age. INTERVENTION(S): Unprocessed three-dimensional datasets were independently evaluated offline by two experienced, blinded raters using both classification systems. MAIN OUTCOME MEASURE(S): The κ-values and proportions of agreement. RESULT(S): Standardized interpretation indicated that the ESHRE-ESGE system has substantial/good or almost perfect/very good reliability (κ >0.60 and >0.80), but the interpretation of the clinically relevant cutoffs of κ-values showed insufficient reliability for clinical use (κ < 0.90), especially in the diagnosis of septate uterus. The ASRM system had sufficient reliability (κ > 0.95). CONCLUSION(S): The low reliability of the ESHRE-ESGE system may lead to a lack of consensus about the management of common uterine malformations and biased research interpretations. The use of the ASRM classification, supplemented with simple morphometric criteria, may be preferred if their sufficient reliability can be confirmed real-time in a large sample size.


Assuntos
Imageamento Tridimensional , Terminologia como Assunto , Anormalidades Urogenitais/classificação , Anormalidades Urogenitais/diagnóstico por imagem , Útero/anormalidades , Útero/diagnóstico por imagem , Estudos de Casos e Controles , Consenso , Feminino , Humanos , Interpretação de Imagem Assistida por Computador , Variações Dependentes do Observador , Valor Preditivo dos Testes , Estudos Prospectivos , Reprodutibilidade dos Testes , Ultrassonografia
20.
Fertil Steril ; 101(5): 1392-9, 2014 May.
Artigo em Inglês | MEDLINE | ID: mdl-24581576

RESUMO

OBJECTIVE: To compare the diagnostic accuracy of three-dimensional sonohysterography (3D-SIS) and office hysteroscopy in uterine cavity assessment after hysteroscopic metroplasty (HM) and determine the interrater/intrarater agreement for 3D-SIS. DESIGN: Prospective observational study. SETTING: University hospital, private hospital, and clinic. PATIENT(S): One hundred forty-one women undergoing HM for septate uterus with a history of miscarriage and/or infertility. INTERVENTION(S): 3D-SIS and office hysteroscopy at 6-8 weeks after HM. MAIN OUTCOME MEASURE(S): Shape of the uterine cavity, length of the fundal notch (≥1 or <1 cm), and the presence of intrauterine adhesions were assessed, and the interrater/intrarater agreement of 3D-SIS was evaluated in 30 randomly selected patients. RESULT(S): Uterine abnormalities were detected with the use of hysteroscopy in 18 (12.8%) of 141 women. 3D-SIS was highly accurate (97.2%), sensitive (97%), and specific (100%), with a positive predictive value of 100% and a negative predictive value of 85%. The diagnostic values of hysteroscopy and 3D-SIS were not significantly different (McNemar test). 3D-SIS showed substantial interrater/intrarater agreement regarding overall uterine cavity evaluation (κ = 0.79 and 0.78, respectively). CONCLUSION(S): 3D-SIS demonstrated substantial interrater/intrarater agreement for the postoperative evaluation of the uterine cavity, being as diagnostically accurate as hysteroscopy. The use of second-look hysteroscopy may be limited to cases that require reoperation.


Assuntos
Histeroscopia/normas , Visita a Consultório Médico , Cirurgia de Second-Look/normas , Ultrassonografia de Intervenção/normas , Útero/diagnóstico por imagem , Útero/cirurgia , Feminino , Humanos , Infertilidade Feminina/diagnóstico por imagem , Infertilidade Feminina/cirurgia , Variações Dependentes do Observador , Estudos Prospectivos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...