Publications by authors named "Gerald P Gui"

Background: Women with ovarian cancer (OC) and a pathogenic variant in the BRCA1 or BRCA2 genes are at increased risk of developing breast cancer (BC). Evidence for long term outcomes in these patients who undergo bilateral risk reduction mastectomy (RRM) after ovarian cancer is sparse. The aim of this study was to analyse the long-term breast cancer-related outcomes of patients who have been diagnosed with ovarian cancer and found to have BRCA1 or 2 pathogenic variants.

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Background: The central round block repair is a volume displacement technique to reconstruct large wide local excision (WLE) defects in breasts with moderate ptosis or hypertrophy. There are limited published data on the outcomes of this technique.

Methods: Data were collected prospectively for 57 consecutive patients and follow up information obtained from patient records.

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Nipple reconstructions are prone to a variable and unpredictable degree of flattening, which in some cases lead to secondary reconstruction. The use of an acellular dermal matrix (ADM) augmentation may be appropriate in cases with very thin dermis that are particularly prone to flattening or in revision cases where the first procedure has already failed. The authors present a series of 13 nipple reconstructions in ten cases.

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Introduction: Doctors who are diagnosed with breast cancer form a small subset of women with unique insight into their disease. The aim of this study was to compare key treatment decisions in medically-qualified doctors with equivalent degree-educated, matched controls diagnosed with early breast cancer.

Methods: Patients diagnosed with breast cancer between 01/01/2006 and 31/12/2011 were included and screened for occupation by 2 independent investigators.

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DNA methylation of tumor-suppressor genes occurs early in the molecular transformation of precursor events to breast cancer and is therefore of interest to screening in high-risk women. The aim of this study was to use tumor-suppressor genes that have previously been shown to be cancer predictive in tissue to evaluate the potential of DNA methylation assays in cells from duct lavage (DL) fluid. The frequency of target gene DNA methylation in tissue and DL of cancer and healthy control patients was assessed, and an association of DNA methylation between different duct systems in the same breast was explored.

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Despite the widespread use of mammography for breast cancer screening, breast cancer remains the most common cause of cancer-related mortality among women worldwide. The identification of biomarkers that identify cancers when they are small, localized and most treatable is an important aim of current breast cancer research. Biomarkers need to be sensitive, specific, reproducible and easily collected from patients from readily accessible tissue or body fluids.

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Aim: Nipple aspiration (NA) and duct lavage (DL) are modalities for obtaining breast duct fluid for biomarker analyses. The aim of this study was to assess the feasibility of obtaining serial NA and DL samples at consecutive patient visits for cytology assessment and the creation of a biobank.

Methods: Seventy eligible subjects were enroled at a single institution in the United Kingdom as part of an international multicentre study.

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The concept of an intraductal approach to evaluate the breast microenvironment assumes direct access to the cancer-containing duct. Central duct access to the cancer-affected lobe is essential if cytology or cell markers are to be useful indicators of pre-malignant change. Access to the cancer-bearing lobe would be less important if field change effects of malignant change were predominantly supra-lobar.

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Background: The challenges of managing breast cancer in women with augmented breasts include screening, diagnosis, oncologic and revisional surgery, and surveillance. In addition, women with augmented breasts frequently have greater expectations of cosmetic outcomes. More breast clinicians will be affected by these challenges as augmentation grows in popularity and women with implants reach the age range in which they are at higher risk of developing breast cancer.

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Background: The majority of benign and malignant lesions of the breast are thought to arise from the epithelium of the terminal duct-lobular unit (TDLU). Although modern mammography, ultrasound, and MRI have improved diagnosis, a final pathological diagnosis currently relies on percutaneous methods of sampling breast lesions. The advantage of mammary ductoscopy (MD) is that it is possible to gain direct access to the ductal system via the nipple.

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A 34 year old woman diagnosed with breast cancer and liver metastases underwent a left subclavian Portacath insertion. During the procedure, the clinical features and the findings of intra-operative investigations provided conflicting evidence of the catheter position. This report highlights the potential difficulties in establishing long-term central venous access, the limitations of common investigations and safety issues relating to the process of subclavian line insertion.

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Introduction: Female germline BRCA gene mutation carriers are at increased risk for developing breast cancer. The purpose of our study was to establish whether healthy BRCA mutation carriers demonstrate an increased frequency of aberrant gene promoter hypermethylation in ductal lavage (DL) fluid, compared with predictive genetic test negative controls, that might serve as a surrogate marker of BRCA1/2 mutation status and/or breast cancer risk.

Methods: The pattern of CpG island hypermethylation within the promoter region of a panel of four genes (RAR-beta, HIN-1, Twist and Cyclin D2) was assessed by methylation-specific polymerase chain reaction using free DNA extracted from DL fluid.

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A proteomic approach to nipple aspiration fluid (NAF) has been used in a number of studies comparing women with breast cancer and healthy women. However, to make useful comparisons between women with breast cancer and healthy women it is necessary to establish whether there is physiological variation in the proteomic profiles of NAF. The purpose of this study was, for the first time, to examine how the proteomic profile of NAF using surface-enhanced laser desorption ionisation time-of-flight mass spectrometry varies across the menstrual cycle in healthy pre-menopausal women.

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A 58 year old lady presented with a right breast cancer and a prior history of malignant melanoma excised from the right chest wall eight years previously. An abnormal axillary lymph node resected contained features of both metastatic breast carcinoma and malignant melanoma. Following oncologic breast cancer management, the patient is well with no evidence of recurrence at three years.

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Female BRCA gene mutation carriers are at increased risk for developing breast cancer. Ductal lavage is a novel method for sampling breast ductal fluid, providing epithelial cells for cytologic assessment and a source of free DNA for molecular analyses. Loss of heterozygosity (LOH) at the BRCA loci in ductal lavage fluid is a potential biomarker of breast cancer risk.

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Established methods of breast cancer detection have well-described limitations, and new diagnostic techniques are evolving continually to improve diagnostic accuracy. The intraductal approach encompasses the modalities of nipple aspiration, ductal lavage, and duct endoscopy, and is a means of directly accessing the microenvironment of the breast and either sampling or visualizing this intraductal milieu. The aim of sampling this mammary microenvironment is to obtain samples from the physical surroundings of cells that are undergoing malignant transformation, thereby providing a new method of detection before the development of a clinically or radiologically discernible mass.

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Background: Little is known about the association among different methods to assess outcome following breast reconstruction. The aim of this study was to comprehensively compare four distinct methods of outcome evaluation following immediate breast reconstruction.

Methods: There were 102 women who were prospectively evaluated: 46 patients had submuscular implants, and 56 patients had implant-assisted latissimus dorsi breast reconstruction.

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Immediate breast reconstruction is offered to the majority of women requiring a mastectomy for cancer treatment. Improvements in implant technology have seen the evolution of shaped, fixed-volume implants and permanent expanders. The theoretical benefits of biodimensional anatomical expander implants include better reconstructed breast form, the potential for achieving this at a single procedure, and the avoidance of a contralateral procedure as a result of improved ipsilateral cosmesis.

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