A collaborative review of the current concepts and challenges of anastomotic leaks in colorectal surgery.

The reduction of the incidence, detection and treatment of anastomotic leakage (AL) continues to challenge the colorectal surgical community. AL is not consistently defined and reported in clinical studies, its occurrence is variably reported and its impact on longterm morbidity and health-care resources has received relatively little attention. Controversy continues regarding the best strategies to reduce the risk. Diagnostic tests lack sensitivity and specificity, resulting in delayed diagnosis and increased morbidity. Intra-operative fluorescence angiography has recently been introduced as a means of real-time assessment of anastomotic perfusion and preliminary evidence suggests that it may reduce the rate of AL. In addition, concepts are emerging about the role of the rectal mucosal microbiome in AL and the possible role of new prophylactic therapies. In January 2016 a meeting of expert colorectal surgeons and pathologists was held in London, UK, to identify the ongoing controversies surrounding AL in colorectal surgery. The outcome of the meeting is presented in the form of research challenges that need to be addressed.

The reliability of lymph-node staging in rectal cancer after preoperative chemoradiotherapy.

AIMS: To determine the prognostic significance of the nodal stage and number of nodes recovered in the surgical specimen after preoperative synchronous chemoradiation (SCRT) and surgery for locally advanced or unresectable rectal cancer. MATERIALS AND METHODS: One hundred and eighty-two consecutive patients with locally advanced or unresectable (T3/T4) rectal carcinomas were entered on a prospective database and treated in this department with preoperative chemoradiation, followed 6-12 weeks later by surgical resection. Most patients received chemotherapy in the form of low-dose folinic acid and 5-fluorouracil (5-FU) 350 mg/m2 via a 60-min infusion on days 1-5 and 29-33 of a course of pelvic radiotherapy delivered at a dose of 45 Gy in 25 fractions over 33 days to a planned volume. After resection, patients with a positive circumferential margin (< or = 1 mm), extranodal deposits or Dukes' C histology received adjuvant 5-FU-based-chemotherapy (n = 40). RESULTS: After SCRT, 161 patients underwent resection. Twenty-one patients remained unresectable or refused an exenterative operation. Median follow-up is 36 months. Down-staging was achieved in most patients, with 19 having a complete pathological response (pT0). The median number of lymph nodes recovered for all patients was five (range 0-21). The 3-year survival rate for node-positive patients is 47%, for node-negative patients with less than three lymph nodes recovered is 62% and for node-negative patients with three or more lymph nodes recovered is 70%. Compared with node-positive patients, simple regression models revealed a reduced hazard ratio (HR) of 0.72 (0.36-1.43) for node-negative patients with less than three nodes recovered and 0.48 (0.26-0.89) for node-negative patients with three or more lymph nodes recovered. In a multivariate model, including nodal status, excision status, age and sex only positive excision margins significantly predicted a poor outcome: HR = 3.05 (1.55-5.97). CONCLUSIONS: The number of nodes found after preoperative chemoradiation is a significant prognostic factor by univariate analysis. In this study, patients with node-negative histology, and at least three nodes recovered, had better long-term survival than patients in whom two or less nodes were recovered or with positive nodes. This effect was attenuated by the inclusion of excision status in multivariate models.

Biliary anastomosis after liver transplantation does not benefit from T tube splintage.

T tubes are commonly used to splint biliary anastomoses after liver transplantation. Although several advantages are claimed for this approach, there is undoubtedly some iatrogenic morbidity associated with the use of T tubes in this situation. We have evaluated 120 consecutive biliary reconstructions after liver transplant, the majority of which were unsplinted end to end bile duct anastomoses. We have shown that biliary leakage and stricture rates are not significantly affected by T tubes. We have also shown that endoscopic retrograde cholangiopancreatography and percutaneous cholangiography are reliable posttransplant methods for cholangiography and stricture dilatation. Routine T tube splintage of post-liver transplant biliary anastomoses is unjustified.

Short course continuous, hyperfractionated, accelerated radiation therapy (CHART) as preoperative treatment for rectal cancer.

Determine feasibility and toxicity of preoperative short course pelvic CHART (25 Gy in 15 fractions over 5 days) for treatment of clinically resectable primary rectal tumours. Between 1998 and 2004, 20 patients with clinically staged T3 resectable rectal carcinoma were treated in this prospective pilot study with preoperative short course CHART to their pelvis. The aim was for total mesorectal excision within 7 days. Radiation toxicity, surgical morbidity, locoregional control (LRC), overall (OS), cause specific (CSS) and disease free survival (DFS) outcomes were documented. Nineteen of the 20 patients completed planned radiotherapy. One discontinued radiotherapy due to toxicity. All patients underwent potentially curative radical surgery. One patient developed grade 3, and three patients grade 2 gastrointestinal toxicity. With a median follow-up of 31 months (range 0.9-88), there is no grade 3, 4 or 5 late toxicity. Two patients experienced grade 2, and three patients grade 1 late bowel toxicity. Two patients died from postoperative complications, and two developed grade 2 abdominal wound infections. At 3 years LRC is 95% (95% CI 83-100), OS 72% (95% CI 51-94), CSS 86% (95% CI 68-100) and DFS 80% (95% CI 60-100). Two patients died from metastatic disease, one patient from a second primary and one patient is alive after successful resection of hepatic metastases. This small study suggests preoperative short course CHART for clinically resectable rectal carcinoma is feasible with acceptable compliance and tolerable side effects.

Role of surgery in the treatment of pseudomyxoma peritonei.

Laparotomy was undertaken in five patients with pseudomyxoma peritonei presenting over a 9-year period. Three patients remain alive and have not required further surgery. A fourth patient has died of an unrelated condition, having been asymptomatic for 8 years, and the fifth has succumbed to the disease 20 years after presentation. It is suggested that an aggressive approach to initial surgery, and in particular thorough peritoneal toilet, carries the best prospects of long-term survival.

Ablation of recurrent primary liver cancer using 131I-lipiodol.

A case of recurrent hepatocellular carcinoma following resection is reported. The patient received 2 treatments of 131I-lipiodol administered via the hepatic artery at angiography. Good localization in tumour tissue was observed on subsequent computed tomographic scans and no adverse effects were seen after either treatment. After the first treatment 2 nodules of recurrent tumour were resected and proved to be totally necrotic. The patient remains well 9 months later with a persistently elevated serum alphafetoprotein but no evidence of residual tumour. It is suggested that 131I-lipiodol may be the treatment of choice for small tumours in elderly high-risk patients.

Utilización conjunta de fármacos inhibidores de la acetilcolinesterasa y antagonistas NMDA en la enfermedad del Alzheimer en personas con síndrome de Down / No disponible

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