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Biomedical subjects

G H Cunnick

Publications and source records attributed to G H Cunnick.

13 recordsLinked to original sources
PubMed2006

Oncological considerations of skin-sparing mastectomy.

AIM: To review evidence concerning the oncological safety of performing skin-sparing mastectomy (SSM) for invasive breast cancer and ductal carcinoma in situ (DCIS). Furthermore, the evidence concerning RT in relation to SSM and the possibility of nipple preservation was considered. METHODS: Literature review facilitated by Medline and PubMed databases. FINDINGS: Despite the lack of randomised controlled trials, SSM has become an accepted procedure in women undergoing mastectomy and immediate reconstruction for early breast cancer. Compared to non-skin-sparing mastectomy (NSSM), SSM seems to be oncologically safe in patients undergoing mastectomy for invasive tumours smaller than 5 cm, multicentric tumours, DCIS or risk-reduction. However, the technique should be avoided in patients with inflammatory breast cancer or in those with extensive tumour involvement of the skin in view of the high risk of local recurrence. SSM with nipple areola complex (NAC) preservation appears to be oncologically safe, provided the tumour is not close to the nipple and a frozen section protocol for the retro-areolar tissue is followed. Although radiotherapy (RT) does not represent a contraindication to SSM, the latter should be used with caution if postoperative RT is likely, since it detracts from the final cosmetic outcome.

Journal Article↗
PubMed2005

Multiple, large, benign peritoneal cysts--a case report.

This case report describes a unique case of large (up to 17 cm!) peritoneal cysts of uncertain aetiology. It illustrates the diagnostic and management difficulties encountered with such a rare problem. Although subsequently proven to be benign, they were thought to represent an extreme form of endosalpingiosis after a literature review.

Cysts↗
PubMed2004

Acute ulcerative colitis in a Meckel's diverticulum.

This report describes the case of a patient with acute ulcerative colitis who underwent an emergency colectomy and removal of an incidental Meckel's diverticulum which appeared inflamed. Histology showed acute inflammation of colonic epithelium within the Meckel's diverticulum, justifying its removal and confirming that this was indeed a 'skip lesion'.

Adult↗
PubMed2004

Acute epididymo-orchitis in an undescended testicle.

Establishing the diagnosis of a groin lump may be difficult, largely due to the large number of potential differential diagnoses. Indeed, this case was originally referred as a strangulated hernia. Despite the final diagnosis being infection of an undescended testicle, the patient did not report that he only ever had one scrotal testicle despite his 78 years of age.

Aged↗
PubMed2004

Evidence for the management of mastalgia.

Mastalgia is the commonest breast symptom presenting to general practitioners and breast surgeons alike. To make a full assessment of the cause, all patients require a full history, examination and, sometimes, investigations. Diary cards are often helpful. The commonest cause is cyclical mastalgia. Most women require reassurance only and the pain often settles spontaneously after a few months. For the remainder, simple lifestyle changes should be suggested initially, such as wearing a well-fitted sports bra, weight reduction, regular exercise and a reduction in caffeine intake. Unfortunately, there is a paucity of evidence for the usefulness of these measures. If pain is persistent or severe, a variety of pharmacological agents exist. The most effective with least side effects is a 3-6-month course of low-dose tamoxifen (10mg). Other proven agents include danazol and bromocriptine, but these have a higher side-effect profile and are rarely indicated nowadays. Newer treatments include lisuride maleate and topical non-steroidal anti-inflammatory preparations.

Breast Diseases↗
PubMed2002

Lymphangiogenesis and breast cancer metastasis.

Breast cancer is one of the commonest malignancies in women in the western world. It spreads predominantly via the lymphatic system. However, the understanding of the formation of lymphatics, lymphangiogenesis, has been limited. This has been largely due to the previous lack of lymphatic specific markers. The most specific marker used in humans has been the vascular endothelial growth factor receptor 3 (VEGFR-3). However, this is also found on blood vessel endothelium. The other vascular endothelial factor receptors (VEGFR-1 and -2) are primarily blood vessel receptors. More recently, novel, specific markers for lymphatics have been discovered, such as LYVE-1, prox I and podoplanin, enabling further research into this new field. Each of these new markers is described in detail. The article also outlines the current understanding in breast cancer metastasis, with an emphasis on the more recent research into lymphangiogenesis. Since these specific markers are now available, quantitation of lymphangiogenesis is now possible by using either immunohistochemistry or quantitative PCR approaches. In addition, to breast cancer, research into many other cancers is now possible using these methods and new markers. With this in mind, possible therapeutic strategies for the future are discussed.

Biomarkers, Tumor↗
PubMed2001

Lymphangiogenesis quantification using quantitative PCR and breast cancer as a model.

The detection of lymphangiogenesis (formation of new lymphatics) has previously been difficult to measure, primarily due to the lack of specific markers for lymphatic endothelium. Using conventional PCR (polymerase chain reaction), DNA sequencing, plasmid synthesis, and real-time quantitative PCR (RTQPCR), we report a new approach to enable the measurement of lymphangiogenesis using LYVE-1, a novel, specific lymphatic marker in breast cancer tissue. By using a Scorpion-based probe system with the RTQPCR analyser, a highly sensitive and specific detection and quantitation of LYVE-1 was possible. It was found that lymphangiogenesis occurred in all breast specimens and that higher levels were found in tumours which had spread to the lymph nodes.

Biomarkers↗
PubMed2001

Anatomical variants of the intercostobrachial nerve encountered during axillary dissection.

Recent reports have described attempts at preserving the intercostobrachial nerve in patients undergoing axillary clearance for breast cancer. However, the anatomy of the nerve encountered by the surgeon operating in the axilla has not been previously described in any detail. In this study, we were able to document the anatomy of this nerve in 45 out of 50 consecutive patients undergoing axillary clearance. We found the anatomy variable, but have illustrated six main variants. In addition, we were able to preserve the nerve in 40 out of 50 cases.

Journal Article↗
PubMed2001

Aromatase inhibitors.

The new non-steroidal and steroidal aromatase inhibitors are at least as effective as megestrol acetate (MA) as second-line hormonal agents in postmenopausal women with breast cancer. However, they are superior to MA in terms of tolerability and adverse effects. Letrozole and exemestane have been shown to be superior to MA in terms of efficacy. Furthermore, exemestane and anastrozole demonstrated a survival advantage over MA. These drugs are therefore considered established second-line hormonal agents. There is a growing body of evidence supporting the role of third-generation aromatase inhibitors as first-line therapy for ER-and/or PgR-positive advanced breast cancer in postmenopausal women, and as a neoadjuvant therapy in postmenopausal women with hormone receptor positive tumours unsuitable for breast conserving surgery. Studies comparing these drugs head-to-head and with adjuvant tamoxifen are currently in progress. The potential role of these drugs in breast cancer prevention is worth investigating.

Antineoplastic Agents, Hormonal↗
PubMed2001

Pre-operative electrocardiograph examination.

The leading cause of death following surgery is a cardiac event, and an electrocardiogram is the most common pre-operative test to investigate coronary artery disease. Fifty adults, who required an electrocardiogram, undergoing general surgical procedures, were recruited into this pilot study, which investigated the examination rate of electrocardiographs by doctors pre-operatively. Each tracing was folded in one corner and a paperclip prevented full pre-operative viewing without its removal. Results suggest that 30% of ECGs were not opened and the records of 58% patients overall had no mention of the ECG having been performed. Further analysis showed no correlation with the examination rate of the electrocardiograph with patient age or fitness. If this reflects normal clinical practice, it is sub-optimal use of resources and warrants further audit.

Abdomen↗
PubMed2000

Junior doctor training in breast and axillary examination: a comparative study.

To date, there has been a lack of published data concerning the training of breast and axillary examination, yet this remains an essential part of the triple assessment of breast lumps. In this study, we aimed to determine the competence of junior doctors in examining the breast and axilla, and whether this skill improved with time. We compared the findings of a specialist registrar and senior house officer with those of a consultant in 15 consecutive one-stop breast clinics in a district general hospital. The results suggested that although specialist registrars become proficient after this period, senior house officers do not progress at the same rate. This may have important implications for training and the organization of breast clinics.

Journal Article↗
PubMedDate not supplied

Radiotherapy and tamoxifen after breast-conserving surgery for DCIS.

The main controversies surrounding the management of DCIS evolve around the need for adjuvant radiotherapy (RT) after adequate local excision (LE) of localized lesions and the role of adjuvant endocrine therapy. Three recent randomized controlled trials (RCTs) have demonstrated that adjuvant RT significantly reduces the incidence of ipsilateral breast tumor recurrence (IBTR) after "adequate" LE. The role of adjuvant tamoxifen in the treatment of DCIS was evaluated in two RCTs: one demonstrated a significant reduction in IBTR with tamoxifen and the other did not. Retrospective subgroup analysis of the former demonstrated that the reduction in all breast cancer events was even greater for ER positive tumors, but no benefit was observed for ER negative lesions. The effect of tamoxifen was greater in both trials for women under 50 years.

Adult↗