scholarly journals Cálculo do perfil de temperatura em um modelo tridimensional da mama para análise paramétrica da influência da posição e do tamanho de um tumor maligno

Author(s):  
José Reginaldo Alves de Queiroz Júnior ◽  
Rita de Cássia Fernandes de Lima

<span class="fontstyle0">Thermography is a technique that is being proposed as an auxiliary tool in breast cancer screening. It gains importance, especially due to the increased incidence of this cancer in the Brazilian female population. These images are also used for the validation of three-dimensional numerical simulations. The production of a more realistic and personalized breast model would allow a more accurate estimate of the sensitivity of thermography as a technique capable of early detection of breast cancer. This work proposes the development of a methodology to produce a custom three-dimensional breast geometry from the manually extracted curves of the thermograms contained in UFPE Thermographic Image Database. With this geometry, parametric analyzes were performed, seeking to understand the influence of tumor depth and size on the calculated temperature profile.</span> <br /><br />

2011 ◽  
pp. 143-147
Author(s):  
Dongfeng Wu ◽  
Adriana Pérez

Breast cancer screening programs have been effective in detecting tumors prior to symptoms. Recently, there has been concern over the issue of over-diagnosis, that is, diagnosis of a breast cancer that does not manifest prior to death. Estimates for over-diagnosis vary, ranging from 7 to 52%. This variability may be due partially to issues associated with bias and/or incorrect inferences associated with the lack of probability modeling. A critical issue is how to evaluate the long-term effects due to continued screening. Participants in a periodic screening program can be classified into four mutually exclusive groups depending on whether individuals are diagnosed and whether their symptoms appear prior to death: True-earlydetection; No-early-detection; Over-diagnosis; and Not-sonecessary. All initially superficially healthy people will eventually fall into one of these four categories. This manuscript reviews the major methodologies associated with the over-diagnosis and long-term effects of breast cancer screening.


2021 ◽  
Author(s):  
Provia Ainembabazi ◽  
Derrick Bary Abila ◽  
Grace Manyangwa ◽  
Godwin Anguzu ◽  
Innocent Mutyaba ◽  
...  

Abstract Introduction In Uganda, Breast cancer is the most common cancer in females globally. The majority of the patients present with advanced-stage disease at diagnoses and experience high mortality. This underscores the importance of early detection approaches based on awareness of risk factors and self-perceived risks, and symptoms of the disease to promote adoption of risk reduction behaviors and prompt health-seeking respectively. This study assessed the self-perceived risk of breast cancer, and breast cancer screening behaviours among first-degree female relatives of breast cancer patients in Uganda.Methods This was a cross-sectional study employing quantitative approaches for data collection and analyses. First-degree female relatives of patients attending care at Uganda Cancer Institute were recruited consecutively in the study. A pre-tested coded questionnaire was used to collect data on self-perceived risks, breast cancer risks, and breast cancer screening behaviours. Data were collected between March to October 2019. A modified Poisson regression model was used to evaluate factors associated with self-perceived risk of breast cancer and breast cancer risk awareness.ResultsWe enrolled 296 first-degree female relatives from 197 female breast cancer patients. The median age (IQR) was 33 (26-43) years. A majority (60.1%, 178/296) of the participants had a low self-perceived risk of breast cancer. Breast self-examination (55.7%, 165/296) was the most practiced screening method followed by clinical breast examination (n= 64/296, 21.6%), ultrasound scan of the breast (7.8%, 23/296,), and mammogram (3.7%, 11/296). Women aged 35-44 years had a higher self-perceived risk of breast cancer (adjusted Incident Rate Ratio [aIRR]: 1.75, 95%CI: 1.10-2.80), compared to women aged 18-25 years. ConclusionFirst-degree relatives reported a low self-perceived risk of breast cancer. Breast cancer health education especially targeting younger women should emphasize the increased risk of breast cancer in first-degree relatives of patients with breast cancer. There is a need to increase awareness of breast cancer screening methods and their usefulness in the early detection of breast cancer among all women in Uganda.


2018 ◽  
Vol 08 (04) ◽  
Author(s):  
Roy Rillera Marzo ◽  
Dinaramalar Sukkirasingam ◽  
Vimalan Letchumanan ◽  
Shangari Anbarasu ◽  
Thiran Raj Ramiah ◽  
...  

2021 ◽  
Vol 8 ◽  
Author(s):  
Erika Bandini ◽  
Tania Rossi ◽  
Emanuela Scarpi ◽  
Giulia Gallerani ◽  
Ivan Vannini ◽  
...  

Breast cancer (BC) is the most commonly diagnosed malignant tumor in women worldwide, and the leading cause of cancer death in the female population. The percentage of patients experiencing poor prognosis along with the risk of developing metastasis remains high, also affecting the resistance to current main therapies. Cancer progression and metastatic development are no longer due entirely to their intrinsic characteristics, but also regulated by signals derived from cells of the tumor microenvironment. Extracellular vesicles (EVs) packed with DNA, RNA, and proteins, are the most attractive targets for both diagnostic and therapeutic applications, and represent a decisive challenge as liquid biopsy-based markers. Here we performed a study based on a multiplexed phenotyping flow cytometric approach to characterize BC-derived EVs from BC patients and cell lines, through the detection of multiple antigens. Our data reveal the expression of EVs-related biomarkers derived from BC patient plasma and cell line supernatants, suggesting that EVs could be exploited for characterizing and monitoring disease progression.


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