Publications by authors named "Sabas C Vieira"

Hereditary breast cancer (BC) accounts for 5-10% of all BC cases. Pathogenic or likely pathogenic germline variants in  and  genes are the most common cause of hereditary BC. However, other genes may also be involved, such as , , , , and  among others.

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Objective: We aim to evaluate the indication and use of genomic signatures in breast cancer patients and outcomes who in patients undergoing adjuvant chemotherapy or not.

Methods: This is a retrospective study of breast cancer patients managed in a private oncology clinic in Teresina, from November 2014 to February 2021. All patients with an indication of genomic signature were included.

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Article Synopsis
  • * A case study is highlighted where a 33-year-old woman discovered a nodule in her left areolar region four years prior, but surgery for removal wasn't performed until after a breast lift two years later, when the tumor was finally identified.
  • * The histopathology of the removed tissue showed the syringomatous tumor had positive margins, but as of 13 months post-diagnosis, the patient is doing well and is under clinical follow-up.
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Granulosa cell tumor (GCT) is a rare ovarian malignancy that represents only 2-3% of all cases. There are two subtypes of GCT: juvenile/JGCT (5% of cases) and adult/AGCT (95% of cases). This study aimed to describe a series of 6 GCT cases.

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Melanoma of the uterine cervix is an exceedingly rare malignancy that has high recurrence rates and distant metastases. In general, surgery is the preferred treatment for this tumor, and depending on stage additional consideration to radiotherapy and chemotherapy. Immunotherapy has emerged as a new treatment option in this context.

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Introduction Triple-negative breast cancer (TNBC) is a molecular subtype in which estrogen (ER)/progesterone receptor (PR) and human epidermal growth receptor 2 (HER2) expression does not occur. The objective of this study was to analyze the impact of pathologic complete response (pCR) after neoadjuvant chemotherapy on the prognosis of triple-negative breast cancer (TNBC) patients. Methods This cohort study was conducted in a private-sector oncology clinic located in the city of Teresina, Brazil.

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Uterine artery embolization (UAE) is a very efficient treatment modality for myoma. A rare complication of this procedure is vaginal expulsion of the uterine myoma (expelled myoma) which may occur in 3 to 5% of cases during a period of 3 to 48 months. We report a case of myoma expulsion after embolization, discussing diagnosis and treatment.

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Lung cancer is the second most common malignancy worldwide, accounting for the highest number of cancer deaths. Advanced lung cancer may infrequently appear as skin metastasis and this may be the first sign of the disease. In these cases, survival is low and prognosis is poor.

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The Brazilian Society of Surgical Oncology organized a group of oncological surgeons to discuss surgical aspects associated with locally advanced breast carcinoma. This article reviews the indications, different surgeries (thoracoabdominal or myocutaneous flaps), and associated complications. It discusses special conditions such as invasion of the chest wall and interscapular thoracic disarticulation.

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Objective: Several controversies remain on conservative management of cervical cancer. Our aim was to develop a consensus recommendation on important and novel topics of fertility-sparing treatment of cervical cancer.

Methods: The consensus was sponsored by the Brazilian Society of Surgical Oncology (BSSO) from March 2020 to September 2020 and included a multidisciplinary team of 55 specialists.

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A totally implantable venous access port (TIVAP) is used for chemotherapy administration. Venous port migration to the systemic circulation occurs in less than 1% of complications. The aim of this study is to describe a case of TIVAP migration to the hepatic vein.

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Background: Around 5%-10% of breast cancers are due to hereditary breast and ovarian cancer syndrome. Genetic testing is important to identify these cases, enabling the adoption of specific risk-reducing treatment strategies.

Objective: To analyze the performance of genetic testing and its implications in patients with indication of genetic testing to identify hereditary predisposition to breast cancer.

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Objective: Triple-negative breast cancer (TNBC) is characterized by lack of estrogen receptor, progesterone receptor, and human epidermal growth factor receptor 2 (HER2) expression and accounts for 15-20% of all breast cancers. This study aims to analyze prognostic factors related to a reduction in overall survival (OS), disease-free survival (DFS), and risk of mortality and recurrence in TNBC.

Methods: This is a retrospective observational cohort study.

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Background: Leiomyoma of the vulva is rare, accounting for only 0.03% of all gynecological tumors, and it is seldom seen in teenagers.

Case: We describe a case of vulvar leiomyoma in a 14-year-old girl who presented a 10 × 10 cm solid tumor in the right hemivulva without other complaints.

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Occult breast cancer (OBC) is characterized by metastatic presentation of undetectable breast tumor on imaging exams. OBC is a rare disease (accounting for 0.3% to 1.

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Reduced serum magnesium concentrations in women with breast cancer compromises one of the antioxidant defense system involved in the carcinogenesis process. To evaluate parameters of magnesium, the enzyme activity of superoxide dismutase, and its relation with oxidative stress markers in women with breast cancer. A case-control study was conducted, involving 60 women in the age range between 29 and 65 years, divided into two groups: women with breast cancer (n = 30) and women without breast cancer (n = 30).

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Angiosarcoma of the breast accounts for less than 1% of breast tumors. This tumor may be primary or secondary to previous radiation therapy and it is also named "radiogenic angiosarcoma of the breast", which is still a rare entity with a poor prognosis. So far, there are only 307 cases reported about these tumors in the literature.

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Objective: To analyze the results of morbidity and survival after curative and palliative surgery in recurrent cervical cancer patients who underwent chemoradiation as their primary treatment. Another goal was to assess the factors associated with curative and non-curative procedures.

Methods: This was a retrospective cohort consisting of patients undergoing surgery curative and palliative from January 2011 to December 2017 at a high complexity oncology center.

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Metastases may occur in early-stage or locally-advanced tumors in diverse locations. Nevertheless, the uterine cervix is an uncommon site for metastasis, since the majority of tumors in this organ is primary carcinomas or result from the direct extension of primary pelvic tumors. The objective of the current study was to report a clinical case considered rare in the literature, as well as discuss its implications and peculiarities.

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Background:  Most endometrial cancers (75%) are diagnosed in early stages (stages I and II), in which abnormal uterine bleeding is the most frequent clinical sign. When the diagnosis is performed in stage IV, the most common sites of metastasis are the lungs, liver and bones. Central nervous system (CNS) metastasis is a rare condition.

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Objective: The goal of this study is to analyze the applicability of the patent blue dye and air in the preoperative marking of impalpable mammary lesions with indication of surgical resection.

Materials And Methods: A prospective cohort study was performed. We selected 49 patients with detection of impalpable lesions on a breast mammography or breast ultrasonography.

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Fracture of a peripherally inserted catheter causing embolization in patients on chemotherapy is a serious and rare complication, constituting less than 1% of complications related to this procedure. We report here a case of fully implantable catheter embolization in a 57-year-old female who had undergone laparotomy for complex adnexal lesion due to ovary cancer with disseminated peritoneal carcinomatosis, diagnosed intraoperatively. The patient was treated with hysterectomy and bilateral salpingo-oophorectomy, and radical oncological surgery was not performed.

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Breast cancer is a disease of high mortality, characterized by the progressive accumulation of mutations that contribute to the uncontrolled development of breast tissue cells. Literature shows that disturbances in mineral homeostasis, such as magnesium, may interfere with tumor progression. The objective of this study is to provide updated information about magnesium's role in the pathogenesis of breast cancer.

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Herlyn-Werner-Wunderlich (HWW) syndrome is part of a spectrum of Müllerian duct anomalies that occur during embryonic development. The syndrome is characterized by uterus didelphys, obstructed hemivagina, and ipsilateral renal agenesis. Only few cases of this disease were reported worldwide.

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