The objective of this study was to investigate the relationship between vascular and metabolic characteristics of breast tumours in vivo, using contrast-enhanced dynamic MRI and 2-[(18)F] fluoro-2-deoxy- d-glucose (FDG) PET imaging. Twenty patients with large or locally advanced primary breast cancers were imaged prior to therapy. MRI data were acquired using a dynamic gradient echo sequence and analysed using two pharmacokinetic models. Static PET data were acquired in 2D mode. A significant association ( P<0.05) was observed between the calculated exchange rate constants of both pharmacokinetic models and calculated PET FDG dose uptake ratios (DUR). Statistical analysis showed that the exchange rate constants can explain between 27 and 44% of the variance observed in the PET FDG uptake ratios. A relationship was demonstrated between the vascular and metabolic characteristics of primary breast tumours showing that any assessment of tumour metabolic activity using PET may be controlled at least in part by delivery of uptake agent due to the vascular characteristics of the tumour. MRI and PET provide methods of assessing breast tumour vascularity and metabolism in vivo using the exchange rate constants of dynamic MRI, and DUR of PET, respectively, these measures being related but not equivalent.
This study aimed to evaluate patterns of local and distant disease recurrence in patients having primary chemotherapy and compared patterns of relapse in patients with a complete pathological response with those who had residual breast disease. This is an observational study using a sequential series of patients treated with primary chemotherapy. They were followed up for a minimum of 5 years. All data was collected prospectively. Three hundred forty-one consecutive patients with breast cancer were treated with up to eight cycles of doxorubicin-based chemotherapy. Clinical and pathological response rates were evaluated and patients were followed up for disease recurrence (local and distant) and overall survival. Fifty-two patients (16.5%) had a complete pathological response to chemotherapy. Distant disease recurrence occurred in nine patients (17.3%) but no local recurrence was observed. In patients not having a complete pathological response, 86 patients (32.6%) subsequently developed metastases. Local recurrence of disease occurred in 12 (4.5%). There was a statistically significant difference in overall survival between patients whose tumours had a complete pathological response compared with patients who had residual disease in the breast following chemotherapy (88% versus 70% at 5 years, p = 0.036). Following primary chemotherapy, about 84% of patients had residual disease in the breast. Surgery is necessary to ensure complete removal of residual tumour and excellent rates of local control are achievable. A complete pathological response is associated with fewer local and distant recurrences as well as improved survival although there are no differences in time to development of metastatic relapse.
In surgical speciality, understanding of the wound healing is absolutely necessary. There are different kinds of wounds that require treatment which is most appropriate to them. In this chapter, we have discussed treatment for different types of wounds in four main types according to WHO Classification. Pros and cons of different types of materials used for cleaning and dressing are discussed. Dressing materials are discussed in detail. We have described the process of wound healing. There are various factors that influence wound healing and we have specifically described how they differ in primary and secondary wound healing. Usage of various kinds of dressing materials and their mechanism of action is described in detail. We have specifically highlighted the role of community nurses and tissue viability nurses. Since the availability and the recognition of tissue viability nurses, the cost of wound treatment has come down considerably and it is also very popular with the patients. Vacuum-assisted closure (VAC) therapy is very helpful in large wounds that are producing a lot of exudates. The VAC pulls the skin edges together and removes the exudate. Other adjunctive therapies are also mentioned but they are not available in most hospitals and therefore detailed descriptions are not provided.
History of breast cancer dates back to at least 1600 B.C. and treatment methods have undergone significant progress over the last hundred years. We are moving away from frighteningly radical, and towards increasingly more conservational breast cancer surgery. And while mastectomy is no longer a first-line choice for all breast cancers, it is still an important and, really, an essential procedure to discuss and research about. Different types and techniques exist and evidence regarding each is vast-with novel techniques appearing even nowadays. For example, robotic surgery is increasingly more common in many surgical specialties and procedures, and mastectomy is no exception. With several high-profile celebrities recently discussing their experiences of breast cancer and mastectomies, this article covers a multitude of essential aspects relevant to this topic, in turn, hopefully, helping patients and doctors deal with the diagnosis and plan the treatment accordingly. Current breast cancer care and mastectomy trends are also discussed here, giving the readers an up-to-date overview of how breast cancer can and should be managed.
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