30 research outputs found

    Tracking Controller for Intrinsic Output Saturated Systems in Presence of Amplitude and Rate Input Saturations

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    Current status of ultrasound-guided surgery in the treatment of breast cancer

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    The primary goal of breast-conserving surgery (BCS) is to obtain tumour-free resection margins. Margins positive or focally positive for tumour cells are associated with a high risk of local recurrence, and in the case of tumour-positive margins, re-excision or even mastectomy are sometimes needed to achieve definite clear margins. Unfortunately, tumour-involved margins and re-excisions after lumpectomy are still reported in up to 40% of patients and additionally, unnecessary large excision volumes are described. A secondary goal of BCS is the cosmetic outcome and one of the main determinants of worse cosmetic outcome is a large excision volume. Up to 30% of unsatisfied cosmetic outcome is reported. Therefore, the search for better surgical techniques to improve margin status, excision volume and consequently, cosmetic outcome has continued. Nowadays, the most commonly used localization methods for BCS of non-palpable breast cancers are wire-guided localization (WGL) and radio-guided localization (RGL). WGL and RGL are invasive procedures that need to be performed pre-operatively with technical and scheduling difficulties. For palpable breast cancer, tumour excision is usually guided by tactile skills of the surgeon performing "blind" surgery. One of the surgical techniques pursuing the aims of radicality and small excision volumes includes intra-operative ultrasound (IOUS). The best evidence available demonstrates benefits of IOUS with a significantly high proportion of negative margins compared with other localization techniques in palpable and non-palpable breast cancer. Additionally, IOUS is non-invasive, easy to learn and can centralize the tumour in the excised specimen with low amount of healthy breast tissue being excised. This could lead to better cosmetic results of BCS. Despite the advantages of IOUS, only a small amount of surgeons are performing this technique. This review aims to highlight the position of ultrasound-guided surgery for malignant breast tumours in the search for better oncological and cosmetic outcomes

    Cosmetic outcome and quality of life are inextricably linked in breast-conserving therapy

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    Introduction: Cosmetic results and quality of life (QoL) are increasingly important in the treatment of breast cancer. This study was designed to determine the relationship between QoL and both subjectively and objectively measured cosmetic outcomes of breast-conserving therapy (BCT), and its course over time. Methods: A total of 128 breast cancer patients who underwent BCT as part of a prospective randomized controlled trial were included. QoL was measured using the EORTC QLQ-C30 and QLQ-BR23 at baseline, 3, 6, 12, and 36 months. Cosmetic outcome was determined by patient self-evaluation, panel evaluation, and BCCT.core software. Results: By 36 months, all QoL factors except arm symptoms had returned to baseline or improved. After adjustment for patient and tumor characteristics, a significantly better QoL in terms of body image, pain, and arm and breast symptoms was found for good/excellent cosmetic outcomes compared to fair/poor outcomes, as measured by both patient self-evaluation and panel evaluation. The BCCT.core showed no correlation with any QoL factors. Conclusion: There is a high correlation between poor cosmetic outcome and low scores on quality of life indicators, underlining the importance of achieving a good cosmetic outcome after BCT

    Breast-specific factors determine cosmetic outcome and patient satisfaction after breast-conserving therapy: Results from the randomized COBALT study

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    Background and Objectives: To identify breast-specific factors and the role of tumor, treatment, and patient-related items in influencing patient opinion on cosmesis and satisfaction after breast-conserving therapy (BCT). Methods: Data from the randomized COBALT study was used. At 3, 12, and 36 months, 128 patients with T1-T2 breast cancer completed a questionnaire on breast-specific factors and overall cosmetic outcome and patient satisfaction, using a 4-point Likert scale. Results: There was a strong positive correlation between breast-specific factors, overall cosmetic outcome,and satisfaction at all time-points. Excellent/good cosmetic outcomes and satisfaction decreased during follow-up. A shift was noted in the degree of influence of the various breast-specific factors. At 3 years, symmetry factors such as size, shape, and nipple position largely determined a patient's opinion on the final cosmesis, followed by firmness. The risk of an unacceptable outcome was associated with young age and large excision volumes. Conclusion: A questionnaire including breast-specific questions provides important information on final cosmetic results and satisfaction after BCT. These outcomes can also be of great value as quality indicators and pre-operative counseling. The major influence of breast-specific factors on asymmetry underlines the importance of achieving an optimal excision volume at the initial procedure
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