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Dive into the research topics where Tim Davidson is active.

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Featured researches published by Tim Davidson.


Psycho-oncology | 2013

Religious/spiritual coping resources and their relationship with adjustment in patients newly diagnosed with breast cancer in the UK

Ingela Thuné-Boyle; Jan Stygall; Mohammed Keshtgar; Tim Davidson; Stanton Newman

Religious/spiritual resources may serve multiple functions in adjustment to cancer. However, there is very little evidence of the importance of religious/spiritual variables outside the USA. This paper reports the cross‐sectional data of a longitudinal study examining the beneficial and harmful effects of religious/spiritual coping resources on adjustment in the first year after a breast cancer diagnosis.


Psycho-oncology | 2011

Religious coping strategies in patients diagnosed with breast cancer in the UK.

I. C. V. Thuné-Boyle; Jan Stygall; Mohammed Keshtgar; Tim Davidson; Stanton Newman

Objectives: The use of religious/spiritual coping strategies may be particularly prevalent when dealing with the stress of a cancer diagnosis. There has, however, been very little research conducted on this topic outside the USA. Existing measures of coping largely ignore the complexity of religious/spiritual coping and its potential to be adaptive as well as maladaptive. The aim of this study was to examine the prevalence of various religious coping strategies in a UK cancer sample.


European Journal of Nuclear Medicine and Molecular Imaging | 2011

18F-FDG PET and biomarkers for tumour angiogenesis in early breast cancer

Ashley M. Groves; Manu Shastry; Manuel Rodriguez-Justo; Anmol Malhotra; Raymondo Endozo; Tim Davidson; Tina Kelleher; Kenneth A. Miles; Peter J. Ell; Mohammed Keshtgar

PurposeTumour angiogenesis is an independent and strong prognostic factor in early breast carcinoma. We performed this study to investigate the ability of 18F-FDG to detect angiogenesis in early breast carcinoma using PET/CT.MethodsTwenty consecutive patients with early (T1-T2) breast carcinoma were recruited prospectively for 18F-FDG PET/CT. The PET/CT data were used to calculate whole tumour maximum standardized uptake value (SUVmax) and mean standardized uptake value (SUVmean). All patients underwent subsequent surgery without prior chemotherapy or radiotherapy. The excised tumour underwent immunohistochemistry for vascular endothelial growth factor (VEGF), CD105 and glucose transporter protein 1 (GLUT1).ResultsThe SUVmax showed the following correlation with tumour histology: CD105: r = 0.60, p = 0.005; GLUT1: r = 0.21, p = 0.373; VEGF: r = −0.16, p = 0.496. The SUVmean showed the following correlation with tumour histology: CD105: r = 0.65, p = 0.002; GLUT1: r = 0.34, p = 0.144; VEGF: r = −0.18, p = 0.443Conclusion18F-FDG uptake is highly significantly associated with angiogenesis as measured by the immunohistochemistry with CD105 for new vessel formation. Given that tumour angiogenesis is an important prognostic indicator and a predictor of treatment response, 18F-FDG PET may have a role in the management of primary breast cancer patients even in early-stage disease.


Oncologist | 2012

Defining the Role of PET–CT in Staging Early Breast Cancer

Ashley M. Groves; Manu Shastry; Simona Ben-Haim; Irfan Kayani; Anmol Malhotra; Tim Davidson; Tina Kelleher; Diane Whittaker; Marie Meagher; Brian Holloway; Ruth M. Warren; Peter J. Ell; Mohammed Keshtgar

INTRODUCTION Currently, there is a lack of data on the role of combined positron emission tomography-computed tomography (PET-CT) in the staging of early invasive primary breast cancer. We therefore evaluated the role of (18)F-fluorodeoxyglucose ((18)F-FDG)-PET-CT in this patient population. METHODS We prospectively recruited 70 consecutive patients (69 women, one man; mean age, 61.9 ± 8.1 years) with early primary breast cancer for staging with (18)F-FDG-PET-CT. All PET-CT images were interpreted by two readers (independently of each other). A third reader adjudicated any discrepancies. All readers had ≥5 years of specific experience. Ethics board approval and informed consent were obtained. RESULTS The mean clinical follow-up was 22.7 ± 12.6 months. The primary tumor was identified with PET-CT in 64 of 70 patients. Of the unidentified lesions, surgical pathology revealed two intraductal carcinomas, one invasive tubular carcinoma, and three invasive lobular carcinomas. Undiagnosed multifocal breast disease was shown in seven of 70 patients. PET-CT identified avid axillary lymph nodes in 19 of 70 patients, compared with 24 of 70 confirmed during surgery. There were four patients who were axillary node positive on PET but had no axillary disease at surgery. Five patients were reported with avid metastases. Two of those patients were treated for metastatic disease (nodal, lung, and liver in one and bone metastases in the other) following further imaging and clinical assessment. In the other three patients, lesions (lung, n = 1; pleural, n = 1; paratrachael node, n = 1) were subsequently diagnosed as benign lesions. CONCLUSION Integrated (18)F-FDG-PET-CT may have a role in staging patients presenting with early breast cancer.


Lancet Oncology | 2001

Abortion and breast cancer: a hard decision made harder

Tim Davidson

Over recent years, concerns have been raised about a possible causal relation between induced abortion and subsequent breast cancer. The abrupt hormonal changes associated with termination of pregnancy may induce changes in breast epithelial cells at a stage when they are not fully differentiated and therefore more vulnerable to later development of breast cancer. This review examines the published evidence supporting and refuting this hypothesis and concludes that there are, to date, insufficient data to justify warning women of future breast-cancer risk when counselling them about abortion.


BMJ | 2009

Tissue screening after breast reduction

Mohammed Keshtgar; Alireza Hamidian Jahromi; Tim Davidson; Paula Escobar; Patrick Mallucci; Afshin Mosahebi; Michael Baum

Patients who undergo breast reduction surgery have a low risk of being found to have breast cancer, but they need to be made aware of it—and doctors need to debate whether routine histological examination of tissue specimens is a good idea. We sought the views of Tom Treasure, a surgeon (doi:10.1136/bmj.b759), Jeremy Sugarman, an ethicist (doi:10.1136/bmj.b753), and Tessa Boase, a lay person (10.1136/bmj.b776)


The Breast | 2014

Detailed evaluation of one step nucleic acid (OSNA) molecular assay for intra-operative diagnosis of sentinel lymph node metastasis and prediction of non-sentinel nodal involvement: Experience from a London Teaching Hospital

Shramana Banerjee; Nikolaos V. Michalopoulos; Norman R. Williams; Tim Davidson; Soha El Sheikh; Nuala McDermott; My-anh Tran-Dang; Stephen Davison; Mohammed Keshtgar

One step nucleic acid (OSNA) is a molecular diagnostic assay for intra-operative detection of sentinel node metastases. This study compared OSNA with standard histopathology in 283 nodes from 170 patients to evaluate sensitivity, specificity and concordance of the two methods. Additional analysis was done to investigate how cytokeratin 19 mRNA copy number affects prediction of non-sentinel node positivity. OSNA sensitivity was 93.2% and specificity 95.8%. Concordance between OSNA and histology was 95.6%. In the patients who had axillary clearance, the OSNA mRNA copy number on the sentinel node had 100% negative predictive value for histologically proven metastasis. mRNA copy numbers <1400 were not associated with histologically proven metastasis in subsequent nodes at axillary clearance. OSNA is a reliable method for the intra-operative evaluation of axillary lymph node metastasis even when half of the lymph node is used. Identification of mRNA copy number threshold predicting the positivity of non-sentinel axillary nodes seems to be feasible and would be clinically important.


Radiation Oncology | 2012

Pacemaker and radiotherapy in breast cancer: is targeted intraoperative radiotherapy the answer in this setting?

Mohammed Keshtgar; David J. Eaton; Claire Reynolds; Katharine Pigott; Tim Davidson; Benjamin Gauter-Fleckenstein; Frederik Wenz

We present the case of an 83 year old woman with a cardiac pacemaker located close in distance to a subsequently diagnosed invasive ductal carcinoma of the left breast. Short range intraoperative radiotherapy was given following wide local excision and sentinel node biopsy. The challenges of using ionising radiation with pacemakers is also discussed.


International Journal of Surgery | 2010

Current status and advances in management of early breast cancer

M. Keshtgar; Tim Davidson; Katharine Pigott; Mary Falzon; Alison Jones

Breast cancer is the most common female cancer. Worldwide, more than a million women are diagnosed every year. However despite this increase, the mortality rate is declining. This is due to combination of factors including early diagnosis and effective treatment. This manuscript which is presented in two sections outlines the current status in management of early breast cancer. Section 1 focuses on the advances in diagnosis and surgical treatment of breast cancer and give an overview of the histopathological aspects. The focus of section 2 is on advances on adjuvant treatment of breast cancer including radiotherapy, chemotherapy and endocrine treatment.


Ejso | 2016

The use of onestep nucleic acid amplification (OSNA) and tumour related factors in the treatment of axillary breast cancer: A predictive model

Shramana Banerjee; Norman R. Williams; Tim Davidson; S. El Sheikh; My-anh Tran-Dang; Stephen Davison; Debashis Ghosh; Mohammed Keshtgar

AIMS We aimed to determine the effectiveness of CK19 mRNA copy number and tumour related factors in predicting non-sentinel axillary nodal involvement, in order to facilitate the formulation of local treatment guidelines for axillary clearance (ANC) following intra-operative analysis of the sentinel node biopsy (SNB) using one-step nucleic acid amplification (OSNA). METHODS Patients due to have (SNB) at our institution for breast cancer as well as patients with high grade ductal carcinoma in situ with pre-operative negative assessment of the axilla were included. Alternate slices of each node were sent for assessment by either OSNA or histopathology. Immediate ANC was performed if OSNA was positive. The CK19 mRNA nodal copy number, the total tumour load (TTL) measured by summation of mRNA copy numbers of all positive nodes, the nodal status at ANC and tumour characteristics for each patient were recorded. A model of risk probability was constructed using TTL and tumour related factors. RESULTS 664 nodes were analysed from 425 patients who had SNB performed between 2011 and 2014. ANC was performed on 105 of these patients. The concordance between OSNA and histology was 91.4% and negative predictive value (NPV) was 97%. TTL (p = 0.003) and LVI (p = 0.04) were identified as risk factors for non-sentinel nodal involvement. The risk probability model identified all patients with pN2 disease for ANC. CONCLUSION In the future a decision to perform ANC will be based on a risk stratification model based on TTL and tumour related factors.

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Shramana Banerjee

Royal Free London NHS Foundation Trust

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Dionisio Acosta

University College London

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Soha El Sheikh

Royal Free London NHS Foundation Trust

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