Faecal egg counts in Australian pasture-based dairy herds

In Australian pastoral dairy systems, a variety of 'routine' anthelmintic programs are used in lactating cows varying from nil anthelmintic use to bi-annual application. Anthelmintic resistance has been repeatedly diagnosed on dairy farms and studies have indicated variable milk production benefits from anthelmintics internationally. We aimed to identify the predominant gastrointestinal parasites in recently calved dairy cows in south-west Victoria and examined the relationship between individual faecal egg counts (FEC) and other cow and management factors such as body condition score, age, and historical anthelmintic use. This study included 18 pasture-based dairy farms in south-west Victoria. FECs were measured in recently calved primiparous and multiparous cows. Individual FEC tests with a minimum detectable FEC of 2.5 eggs per gram of faeces (epg) and group larval cultures were completed. Farm management data and cow information was recorded for data analysis with the Jamovi statistical package. Overall, 35% of all cows had FEC ≥ 2.5 epg (26% of multiparous and 45% of primiparous). Ostertagi ostertagi was the predominant gastrointestinal nematode in all cohorts. Cooperia pectinata or C. punctata were also present in mixed infestations alongside C. oncophora. Multiparous cows in low body condition score post calving (<4) were more likely to have a FEC of >5 epg. Faecal egg counts at a minimum detectable FEC of 2.5 epg are effective indicators of parasitism in recently calved primiparous and poorly conditioned multiparous dairy cows. Increasing the test sensitivity (minimum detectable count) of FECs from 10 epg to 2.5 epg resulted in increasing the overall positive FEC rate from 15% to 35%. Further investigation of sensitive FECs and their relevance to production along with the timing and value of anthelmintic use in dairy cattle is warranted.

Lung cancer outcomes at a UK cancer unit between 1998–2001

There are few data published on lung cancer survival in the UK. Survival rates for lung cancer at a UK Hospital between 1998-2001 are described.

METHODS

Analysis of data collected from multidisciplinary team (MDT) meetings, lung cancer registrations and hospital coding.

RESULTS

835 new lung cancers were diagnosed comprising 597 non-small cell lung cancers (NSCLC) (71%), 133 small cell (SCLC) (16%), and 105 clinical diagnoses (13%). Stage at diagnosis; stage I (25%), II (9%), IIIA (8%), IIIB (23%), IV (35%). Surgery was undertaken in 12%, radical radiotherapy (RT) in 4%, palliative RT in 32%, chemotherapy in 8% and best supportive care (BSC) in 36%. The 3-year cumulative survival for NSCLC was: stage I 39%, stage II 30%, stage III 6%, stage IV 0.5%. Only 46% of patients with stage I-IIIA disease received radical treatment. Reasons included poor lung function (32%), unresectable (24%), co-morbidities (17%), performance status (8%), patient choice (8%), unclear (6%), advanced age (5%).

CONCLUSIONS

Survival figures are similar to other UK studies but do not compare favourably with US and European data. This may be because a large proportion of patients with early stage disease receive palliative care only.

Predictors of operative death after oesophagectomy for carcinoma

BACKGROUND

Oesophagectomy for carcinoma provides a chance of cure but carries significant risk. This study defined risk factors for death after oesophageal resection for malignant disease.

METHODS

Between 1990 and 2003, 773 oesophagectomies for oesophageal cancer were performed. Continuous variables were categorized into quartiles for analysis. Predictors of operative mortality were identified by univariate and multiple logistic regression analysis.

RESULTS

The operative mortality rate was 4.8 per cent (37 of 773). In univariate analysis, advanced age, reduced forced expiratory volume in 1 s (FEV1), reduced forced vital capacity, presence of diabetes and tumour located in the upper third of the oesophagus were associated with a higher mortality rate. Multivariate analysis identified age (highest relative to lowest quartile, odds ratio (OR) 4.87 (95 per cent confidence interval (c.i.) 1.35 to 17.55); P = 0.009), tumour position (upper third relative to other locations, OR 4.23 (95 per cent c.i. 1.06 to 16.86); P = 0.041) and FEV1 (lowest relative to highest quartile, OR 4.72 (95 per cent c.i. 1.01 to 21.99); P = 0.018) as independent predictors of death.

CONCLUSION

Advanced age, impaired preoperative respiratory function and a tumour high in the oesophagus are associated with a significantly increased risk of death after oesophagectomy for carcinoma.

Pneumonectomy for non-small cell lung cancer: predictors of operative mortality and survival

OBJECTIVE

The purpose of this study was to identify predictors of operative mortality and survival following pneumonectomy for non-small cell lung cancer (NSCLC).

METHODS

All 206 patients having a pneumonectomy for NSCLC between 1991 and 1997 in our unit were prospectively studied. There were 162 males (79%) and 44 females (21%) with a mean age (+/- standard deviation) of 61+/-7.7 years (range 34-81 years). Squamous cell (75%) and adenocarcinoma (17.0%) were the predominant histological types. The possible impact of 29 parameters on operative mortality and survival was tested with univariate and multivariate analysis. The mean follow-up was 2.3+/-1.2 years, ranging between 0 and 6.8 years, and it was complete.

RESULTS

Operative mortality was 6.8% (14 deaths). On multiple logistic regression older age (P=0.04) and the development post-operatively of bronchopleural fistula (BPF) (P=0.01) were independent predictors of operative mortality. The overall, Kaplan-Meier, 1-, 3- and 5-year survival (+/- standard error from the mean), inclusive of operative mortality, was 68+/-3.3, 42+/-4.1 and 35+/-4.5%. On Cox proportional hazards regression adenocarcinoma (P=0.006), the development of BPF (P=0.003), older age (P=0.03) and higher pathological stage (P=0.02) were independent adverse predictors of survival.

CONCLUSION

Pneumonectomy for NSCLC carries a considerable, but acceptable, operative mortality and provides an important survival benefit. This study suggests that older age and BPF are major determinants of an unfavourable in-hospital outcome; older age, BPF, adenocarcinoma cell type and higher pathological stage significantly reduce the probability of a long-term survival.

A tailored surgical approach for gastro-oesophageal reflux disease: the Nottingham experience

OBJECTIVE

The objective was to assess the results which can be achieved by tailoring the anti-reflux procedure to the anatomical and functional situation of the patient with gastro-oesophageal reflux disease (GORD).

PATIENTS AND METHODS

Two hundred and seventy six patients undergoing a primary tailored anti-reflux procedure between 1986 and 1996 were evaluated. An anti-reflux procedure was selected on the basis of the anatomical and functional findings assessed by means of barium video, endoscopy, manometry and prolonged pH monitoring. The operations performed were Nissen fundoplication (77), total fundoplication gastroplasty (TFG; 140) and Belsey Mark IV (BMIV; 59). The unit policy is for life-long follow-up. The symptoms at review were assessed and graded according to previously published criteria (Orringer MB, Skinner DB, Besley HR. Long-term results of the mark IV operation for hiatal hernia and analyses of recurrences and their treatment. J Thorac Cardiovasc Surg 1972;63:25-31). Patients with recurrent symptoms were fully re-investigated.

RESULTS

Mean hospital stay was 8.2 days (5-32 days). There was one hospital death (0.36%). Mean follow-up was 6.7 years (range, 2.2-13.1 years). Overall excellent or good results were achieved in 247 (89.5%) patients (92.2% in Nissen, 90.7% in TFG and 83.1% in BMIV group, P=0.1). In patients without oesophagitis (n=72), the success rate was 93.1%, while for patients with grade IV oesophagitis (n=89) this was 87.6% (P=0.2). Kaplan-Meier freedom from recurrent or new, operation-induced, symptoms at 10 years was 88.1% (89.5% in Nissen, 87.4% in TFG and 73.8% in BMIV groups, P=0.08).

CONCLUSIONS

These data suggest that where the appropriate anti-reflux procedure is selected, surgery can achieve satisfactory mid- and long-term success rates across the spectrum of GORD. When oesophageal shortening is evident, or merely suspected, we favour a TFG. In the presence of impaired motility and no evidence of oesophageal shortening, a BMIV is the preferred approach. The Nissen procedure is used for uncomplicated cases.

Comparison of long-term results of total fundoplication gastroplasty and Belsey Mark IV antireflux operations in relation to the severity of oesophagitis

OBJECTIVE

Belsey Mark IV (BM IV) and total fundoplication gastroplasty (TFG) were the standard anti-reflux operations in two consecutive periods in Nottingham City Hospital Thoracic Surgery Unit. The aim of this study was to compare the long-term results obtained by these two procedures emphasizing their relation to the severity of the oesophageal mucosal damage.

METHODS

Ninety patients (50 females and 40 males with a mean age of 57 years) who had a BM IV operation between 1976 and 1983 and 86 patients (46 females and 40 males, with a mean age of 56.5 years) undergoing a TFG procedure between 1983 and 1986 were evaluated. All patients were assessed preoperatively by means of clinical history, barium meal and endoscopy. In addition, 72 of the patients having a TFG had prolonged pH monitoring and manometric studies. The unit policy is for life-long follow-up. The symptoms at review were assessed and graded according to the criteria published by Orringer et al. (Orringer MB, Skinner DB, Belsey RHR. Long-term results of the Mark IV operation for hiatal hernia and analyses of recurrences and their treatment. J Thorac Cardiovasc Surg 1972;63:25-33).

RESULTS

In the BM IV group there was one post-operative death (1.1%). The median follow-up was 11 years (range 3-18 years). Overall good results were achieved in 64 patients (71.9%). In patients without oesophagitis (n = 24) the success rate was 91.7% while for grades I (n = 17), II-III (n = 36) and IV (n = 12) oesophagitis this was 76.5, 66.7 and 41.7%, respectively (P = 0.01). The actuarial success rate at 10 through to 18 years was 71.0%. In the TFG group there was no postoperative death. The median follow-up was 10 years (range 2-14 years). Overall good results were achieved in 78 patients (90.7%). In the absence of oesophagitis (n = 10) the success rate was 90.0% and for grades I (n = 12), II-III (n = 26) and IV (n = 38) oesophagitis this was 91.6, 92.3 and 89.4%, respectively. The actuarial success rate at 10 through to 14 years was 90.3%. The differences in the overall success rate (P = 0.002), the success rates forgrades II-III (P = 0.02) and IV (P = 0.001) oesophagitis and the long-term actuarial success rates (P = 0.001) were significant.

CONCLUSION

These data provide evidence on the superiority of the TFG against the BM IV in achieving long-term relief of reflux symptoms in the presence of severe oesophagitis. We believe that failure of BM IV in this setting is due to obvious or subtle oesophageal shortening.

Chylothorax following oesophagogastrectomy for malignant disease

OBJECTIVE

To define the incidence, causes, management and impact of Chylothorax after oesophagogastrectomy for malignant disease in Nottingham Thoracic Surgery unit.

PATIENTS AND METHODS

Retrospective analysis of 523 patients with cancer of the oesophagus or the gastro-oesophageal junction who underwent oesophageal resection between January 1987 and November 1997 in a single unit using similar techniques and uniform routine perioperative management.

RESULTS

Chylothorax occurred in 21 patients (4.0%). There were 12 males and 9 females with a mean age of 64.7 years (SD 7.5). Age, sex, tumour site, length, histological type, depth of wall penetration, nodal status and type of operative approach were not significant predisposing factors on univariate and multivariate analysis. Seventeen patients were treated conservatively (four deaths, 23.5%) and four surgically (one death, 25.0%), effective control of the chylous leak being achieved in all four cases. Eleven patients with a chylous drainage of up to 2.2 l/day, diminishing within 1 week of conservative treatment had an uneventful recovery. However, a chylous drainage of more than 2.5 l/day in the remaining ten patients was associated with increased morbidity, hospital stay, operative mortality and the need for surgical intervention. In comparison with the remaining patients (n = 502), those who developed chylothorax (n = 21) had more respiratory complications (42.8%, P = 0.008), longer mean hospital stay (23.8 days, P = 0.004), higher operative mortality (23.1%, P = 0.004) and, unexpectedly, reduced 5 year survival rate (P < 0.0001).

CONCLUSIONS

There appeared to be no clear predisposing factor in the development of a chylous leak other than the routine extensive dissection. Although definitive conclusions can not be drawn, where there is early reduction of the initial amount (in this series up to 2.2 l/day) of drainage, there may be a place for successful non-surgical management; in cases of high output chylothorax, persisting after a few days of conservative treatment, however, early re-operation and ligation of the thoracic duct, seems to be advisable.

Differential role of vasoactive prostanoids in porcine and human isolated pulmonary arteries in response to endothelium-dependent relaxants

The pig is increasingly being used in medical research, both as a model of the human cardiovascular system, and as a possible source of organs for xenotransplantation. However, little is known about the comparative functions of the vascular endothelium between porcine and human arteries. We have therefore compared the effects of two endothelium-dependent vasorelaxants, acetylcholine (ACh) and the Ca2+-ATPase inhibitor, cyclopiazonic acid (CPA) on the porcine and human isolated pulmonary artery using isometric tension recording. ACh and CPA produced endothelium-dependent relaxations of both the human and porcine pulmonary arteries. In the porcine pulmonary artery, the cyclo-oxygenase inhibitor, flurbiprofen had no effect on relaxations to ACh (Emax: control 67.8+/-8.8% versus 72.4+/-9.5% (n=11)) or CPA (Emax: control 79.6+/-5.0% versus 94.0+/-10.6% (n=7)). The nitric oxide synthase inhibitor, L-NAME converted relaxations to both ACh and CPA into contractile responses (maximum response: ACh 30.0+/-11.1% (n = 10); CPA 80.4+/-26.2% (n = 8) of U46619-induced tone). These contractile responses in the presence of L-NAME were abolished by flurbiprofen. In the human pulmonary artery, L-NAME and flurbiprofen partly attenuated relaxations to ACh (Emax: control: 45.1+/-12.1%; flurbiprofen: 33.4+/-13.5%; L-NAME: 10.1+/-7.2%) and CPA (Emax: control: 78.1+/-5.5%; flurbiprofen: 69.6+/-7.2%; L-NAME 37.9+/-10.7% of U46619-induced tone). These responses were abolished by the combination of both inhibitors. We have demonstrated that while the release of nitric oxide is important in responses to endothelium-dependent vasorelaxants in both human and porcine pulmonary arteries, in the human arteries, there is an important role for vasorelaxant prostanoids whilst in the porcine arteries, vasoconstrictor prostanoids are released.

Surgery for esophageal cancer in elderly patients: the view from Nottingham

OBJECTIVE

Our aim was to compare the outcome of esophageal resection for carcinoma in elderly patients (aged over 70 and over 80 years) with that of younger patients managed within a single specialist thoracic surgery unit.

PATIENTS AND METHODS

Between January 1987 and November 1997, 523 patients underwent esophagectomy for carcinoma in the Nottingham City Hospital Thoracic Surgery Unit. The patients were divided into 3 groups by age: group I, under 70 years (n = 337); group II, 70 to 79 years (n = 150), and group III, 80 to 86 years (n = 36). These groups were compared with regard to preoperative medical status, operability and resectability, complications, operative mortality, and longterm survival.

RESULTS

Patients in groups II (6.0%) and III (2.8%) had fewer preexisting respiratory problems than patients in group I (12.5%), and the patients in group III had fewer preexisting cardiovascular problems (16.7%) than patients in groups I (25.2%) and II (32.7 %). Although patients in group III were generally less likely to have operable lesions (64.3%), no significant differences in resectability rate were detected among the 3 groups (80.8%, 77.7%, and 80%). Elderly patients (groups II and III) had a higher incidence of overall (34% and 36.1%), respiratory (24.7% and 19.4%), and cardiovascular (7.3% and 11.1%) complications than those aged under 70 years (24.6%, 16.3%, and 2.1%, respectively). However, operative mortality (4.7%, 6.7%, and 5.6%) and 5-year survivals inclusive of operative mortality (25.1%, 21.2%, and 19.8%) were similar among the 3 groups.

CONCLUSIONS

Accumulated experience in all aspects of perioperative management may account for a low hospital mortality in elderly patients despite a greater operative risk. The survival benefit is similar to that in the younger age groups, enforcing the view that esophagectomy within specialist thoracic units can be safely offered (in appropriately selected patients) with acceptable long-term survival in all age groups.

Inflammatory pseudotumors of the lung

Two unusual cases of inflammatory pseudotumors in young female patients are described. One presented with massive hemoptysis and a solitary circumscribed mass treated with urgent lobectomy. The second presented initially with cough and a small right lower lobe mass. She presented again, 8 years later, with a lung mass so expanded as to necessitate a pneumonectomy with partial resection of surrounding structures. Both cases indicate the need for early and complete removal of the inflammatory pseudotumors.

Dysphagia due to pancreatic pseudocyst with mediastinal extension

This case report describes a patient who presented with severe dysphagia, found to be due to a large pancreatic pseudocyst extending into the mediastinum. The patient was successfully treated by cystgastrostomy.

The surgical management of empyema thoracis

Empyema thoracis remains a common thoracic problem with challenging management strategies. We analysed retrospectively 107 consecutive patients treated for empyema thoracic over a 5-year period. The majority of patients (75%) were male with a mean age of 51 years. Common presenting symptoms were cough, dyspnoea, chest pain and pyrexia. The mean duration of pre-admission symptoms was 7.5 weeks. The causes of empyema were pneumonia, malignancy, iatrogenic injury and trauma. The most frequently isolated organism was Streptococcus milleri. In 71% of patients there was an underlying systemic disorder. Forty-nine patients (46%) underwent an unsuccessful therapeutic procedure prior to admission to the surgical units. In the units, 24 patients received closed intercostal chest tube drainage, 14 of whom required further intervention. Two patients were treated with repeated thoracocentesis. The majority of patients underwent a surgical procedure in the first instance: rib resection and drainage (5), decortication (22), and more extensive procedures (9) with only two patients requiring further surgery. The mean post-operative stay was 16 days and the hospital mortality was 13%. We recommend early referral of all empyema patients to thoracic units, where assessment and definitive procedures can be performed with high chances of success and moderate risk of morbidity and mortality.

Pelvic exenteration: a treatment for failed rectal cancer surgery

Local-regional recurrences of the pelvis occur as an isolated event in 4 to 24 per cent of rectal cancer patients. While radiation therapy may provide temporary relief of pain due to recurrence, only a salvage pelvic exenteration offers hope of cure in these patients. We identified and reviewed 16 rectal cancer cases with local-regional recurrence who underwent salvage pelvic exenteration for cure. There were eight men and eight women. The primary cancer was treated by AP resection (3), low anterior resection (6), Hartman's resection (6), or local excision (1). Tumor at primary resection was Stage I for two patients, II for five patients, and nine patients were Stage III. Adjuvant radiation had been given to nine patients. The type of exenteration required for curative resection was anterior (3), posterior (6), total (4), or total-sacral (3). One patient died postoperatively. Survival calculations were from time of salvage exenteration until death or last follow-up. Only six deaths have occurred with a 5-year survival of 49 per cent. Mean survival for the total group was 31 months. Salvage pelvic exenteration should be given high priority in managing local-regional recurrences of the pelvis and provides worthwhile survival.

Dissemination of tumour cells from fine needle biopsy

A 53 year old woman developed a cutaneous tumour implant in the needle track after transcutaneous fine needle biopsy of a pulmonary adenocarcinoma. The tumour implant was completely excised.

Spontaneous perforation of cervical oesophagus associated with oesophageal web

A case is described, of a patient who sustained a spontaneous perforation of the cervical oesophagus in association with a congenital oesophageal web.

The role of computed tomography in assessing the operability of oesophageal carcinoma

The reliability of CT scanning in assessing resectability in carcinoma of the oesophagus was investigated prospectively by direct comparison with the operative findings. Over 11 months, 38 patients judged potentially operable following conventional investigation underwent CT scanning from the thoracic inlet to the level of the adrenal glands. These patients were then explored surgically with a view to resection. The CT findings were assessed by two radiologists without access to clinical information. Operative findings were recorded by the surgeon. Comparison was made between the tomographic and surgical findings specifically assessing: longitudinal tumour extent, direct mediastinal infiltration, invasion of other mediastinal structures, lymph node involvement and the presence of hepatic and pulmonary metastases. The sensitivity and specificity of the scan for each feature was then calculated. Scan sensitivity was poor, ranging from 0%-66.7%. Specificity was better with a range of 70.8%-100% according to the criterion studied. We conclude that the poor sensitivity means that CT scanning is of little value in the preoperative assessment of resectability in oesophageal carcinoma.

Multiple symmetric lipomatosis (Launois-Bensaude syndrome): effect of oral salbutamol

A 65-year-old Kenyan Asian developed rapidly progressive multiple symmetrical lipomatosis over 8 years. Noradrenaline infusion showed a normal response of plasma free fatty acids. In-vitro studies of the lipomatous tissue demonstrated intact lipolytic activities with a normal rate of free fatty acids release and cyclic AMP accumulation with or without isoprenaline and fenoterol stimulation. A clinical trial of oral salbutamol, a beta 2-agonist, was performed with significant therapeutic effect. The body fat mass showed a reversal of the rapid progression while on the treatment, associated with an increase in the resting metabolic rate.

Within-groups changes in reading performance, a further analysis

Within-groups analyses of performance by groups of college students taught reading by 4 different methods yielded information not reflected in the initial analysis. Patterns of change by methods were not the same.