Publications by authors named "Chris Wakeman"

Background: Vertical rectus abdominis myocutaneous (VRAM) flap has proven to be a robust reconstruction method following radical pelvic surgery. Radical pelvic surgery is associated with high morbidity due to pelvic complications and non-healing perineal wounds, as a result of non-collapsible pelvic dead space and pre-operative adjuvant radiotherapy insult. VRAM flap reconstruction addresses both issues by obliterating the dead space and introducing healthy non-radiated tissue.

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Background: Once considered to be a congenital condition, the epidemiology of right-sided colonic diverticulosis (RCD) is evolving. Acute diverticulitis (AD) is a complication of RCD which is frequently misdiagnosed as appendicitis, resulting in unnecessary surgery, as there is strong evidence supporting medical management for right-sided AD. In general, the incidence of AD correlates with the prevalence of RCD, which shows marked geographic variation.

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Article Synopsis
  • Lynch syndrome is the leading inherited cause of colorectal cancer (CRC), and this study examined the CRC-risk among patients undergoing regular colonoscopy surveillance in New Zealand.
  • A total of 381 participants with various Lynch syndrome mutations were followed, with 18 individuals developing CRC after an average of 6.5 years; most cases were diagnosed early and with no CRC-related deaths.
  • The findings highlighted different CRC risks based on specific mutations, indicating a 5-year risk of 2.49% overall, and cumulative risks by age 70 for MLH1, MSH2, and MSH6 variants were 17.7%, 17.8%, and 8.5%, respectively.
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Carcinoembryonic antigen (CEA) is not normally produced in significant quantities after birth but is elevated in colorectal cancer. The aim of this review was to define the current role of CEA and how best to investigate patients with elevated CEA levels. A systematic review of CEA was performed, in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.

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Background: Extensive multi-visceral resection, including components of the urinary tract, is often required to achieve clear resection margins, which is now well established as a key predictor of long-term survival for locally advanced pelvic tumours. The aims of this study were to analyse major morbidity and factors predicting complications and long-term outcomes following a urological procedure within extended radical resections.

Methods: Data were collected from prospective databases at two high-volume institutions specialising in extended radical resections for locally advanced and recurrent pelvic malignancies between 1990 and 2015.

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Background: The oncological role of pelvic exenteration for locally advanced and recurrent pelvic malignancies arising from the anorectum, gynaecological, or urological systems is now well-established. Despite this, the surgical community has been slow to accept pelvic exenteration, undoubtedly due to concerns about high morbidity and mortality rates. This study assessed the general major complications and predictors of morbidity following extended radical resections for locally advanced and recurrent pelvic malignancies.

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Objective: To examine the changes in exenterative surgery over three decades analysing oncological outcomes and whether changes in surgical approach have led to improved patient outcomes.

Background: Advances in surgical technology, perioperative care and pattern of disease recurrence have coincided with an evolutionary change in exenterative surgery.

Methods: A review of a prospectively maintained databases of pelvic exenteration surgery from 1988 to 2018  at two high volume specialised institutions.

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Aim: Abdominal tuberculosis presents with non-specific symptoms, including generalised abdominal pain. Prompt and accurate diagnosis is critical to improving outcomes and avoiding complications. We conducted a retrospective review of cases of abdominal tuberculosis presenting to Christchurch Hospital to explore the epidemiology, clinical features and diagnostic modalities used.

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Aim: The aim of this study was to describe the demographics, mechanisms of injury, management and outcomes in patients who suffered splenic trauma in Christchurch, New Zealand.

Methods: A retrospective study included all splenic injury patients admitted to Christchurch Public Hospital between January 2005 and August 2015.

Results: A total of 238 patients were included, with a median age of 26 years (4-88.

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Background: Colorectal cancer is a common and often fatal malignancy. Currently, the modifications that alter disease outcome include early symptom recognition, population screening as well as improved surgical and adjuvant treatments. Preventative strategies have been limited with little evidence that lifestyle changes significantly alter risk.

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Background: New Zealand tumour standards require discussion of all cases of colorectal cancer in a multidisciplinary meeting (MDM), but supporting evidence is lacking. The aim was to determine which patients benefit from MDM discussion.

Methods: A retrospective and prospective audit was undertaken of all patients discussed in the Christchurch Hospital colorectal MDM over 12 months to November 2014, who were compared with contemporaneous patients not discussed and identified through Hospital discharge codes.

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Background: There is minimal published data evaluating the oncological outcome of rectal resection with prostatectomy alone versus rectal resection with cystoprostatectomy in patients undergoing pelvic exenteration for locally advanced or recurrent pelvic cancer. This study aims to evaluate the oncological and functional outcomes of performing rectal resection with prostatectomy alone compared with rectal resection with cystoprostatectomy in patients undergoing pelvic exenteration.

Methods: Consecutive patients undergoing pelvic exenteration for locally advanced or recurrent pelvic cancer between 1998 and 2012 were identified from a prospectively maintained database.

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Aim: Melanoma of the anorectum is a rare malignancy which is particularly aggressive compared to cutaneous melanoma. Due to its presenting symptoms, location and rarity there is often a delay in diagnosis. The purpose of this paper is to raise awareness of anorectal melanoma in New Zealand by presenting our institution's experience of four cases.

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Background: Gastrointestinal stromal tumours (GISTs) are the most common mesenchymal tumours of the gastrointestinal tract and make up 1-2% of all gastrointestinal malignancies. Traditionally, the treatment of choice for primary disease is surgical resection; however, no single surgeon or institution gets extensive exposure to these patients so appropriate decision-making is difficult, particularly since the introduction of the tyrosine kinase inhibitor imatinib, which has become an important additional management tool.

Method: All patients were diagnosed and treated for GISTs in Christchurch Hospital (Christchurch, New Zealand) between 1 January 2000 and 31 December 2010.

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Background: Colorectal cancer is the second most common type of solid organ cancer in New Zealand behind prostate cancer. Even with treatment, distant disease may develop in the liver and lungs. Surgical resection of isolated liver and/or lung metastasis is now commonly considered, but survival outcomes from the latter are not well described.

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Background: CD40 plays a critical role in immunoregulation, and CD40 ligation is being investigated as a therapy for hematologic malignancies. Although soluble CD40 (sCD40) is a potential modulator of both antitumor responses and CD40-based therapies, the levels and significance of sCD40 in patients with hematologic malignancies are unknown.

Methods: The authors evaluated serum/plasma sCD40 levels using an enzyme-linked immunoassay in patients with acute myeloid leukemia (AML), myelodysplastic syndrome (MDS), chronic lymphocytic leukemia (CLL), mantle cell lymphoma (MCL), and multiple myeloma (MM).

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