Mid-term oncologic outcome of a novel approach for locally advanced colon cancer with neoadjuvant chemotherapy and surgery

PURPOSE

Neoadjuvant chemotherapy is being actively tested as an emerging alternative for the treatment of locally advanced colon cancer (LACC) patients, resembling its use in other gastrointestinal tumors. This study assesses the mid-term oncologic outcome of LACC patients treated with oxaliplatin and fluoropyrimidines-based preoperative chemotherapy followed by surgery.

METHODS AND PATIENTS

Patients with radiologically resectable LACC treated with neoadjuvant therapy between 2009 and 2014 were retrospectively analyzed. Radiological, metabolic, and pathological tumor response was assessed. Both postoperative complications, relapse-free survival (RFS), and overall survival (OS) were studied.

RESULTS

Sixty-five LACC patients who received treatment were included. Planned treatment was completed by 93.8 % of patients. All patients underwent surgery without delay. The median time between the start of chemotherapy and surgery was 71 days (65-82). No progressive disease was observed during preoperative treatment. A statistically significant tumor volume reduction of 62.5 % was achieved by CT scan (39.8-79.8) (p < 0.001). It was also observed a median reduction of 40.5 % (24.2-63.7 %) (p < 0.005) of SUV_max (Standard Uptake Value) by PET-CT scan. Complete pathologic response was achieved in 4.6 % of patients. Postoperative complications were observed in 15.4 % of patients, with no cases of mortality. After a median follow-up of 40.1 months, (p ₂₅-p ₇₅: 27.3-57.8) 3-5 year actuarial RFS was 88.9-85.6 %, respectively. Five-year actuarial OS was 95.3 %.

CONCLUSION

Preoperative chemotherapy in LACC patients is safe and able to induce major tumor regression. Survival times are encouraging, and further research seems warranted.

Transthoracic oesophagectomy with lymphadenectomy in 100 oesophageal cancer patients: multidisciplinary approach

OBJECTIVES Analysis of the results on the treatment of esophageal cancer by transthoracic esophagectomy by a multidisciplinary team of surgeons and oncologists. METHODS Between January 1990 and December 2009, 100 consecutive patients underwent transthoracic esophagectomy. Data were collected prospectively and clinical, pathological and histological features of the tumors were analyzed as well as the results of postoperative morbidity and mortality. RESULTS The average patient age was 55 years (range 31- 83 years). In 59 cases the tumor was located in the lower third and in 41 cases in the middle third. Forty-six patients had adenocarcinoma and 54 squamous cell carcinoma. In 54 cases radio-chemotherapy was planned preoperatively. Classifi cation according to pathological tumor stage was: stage 0 in 21 patients, stage I in 10 patients, stage IIa in 28, stage IIb in 9, stage III in 21 and stage IV in 11. The mean number of lymph nodes examined was 14 (range 0-28). Hospital mortality occurred in 4 cases and postoperative complications in 29 patients (33%). The most frequent postoperative complication was pulmonary complications in 17 cases. The average hospital stay was 15.2 days (range 10-40 days) CONCLUSIONS The results of esophageal cancer have been improved in recent years due to the formation of multidisciplinary teams in this pathology. In our study we have shown that the results obtained with the transthoracic technique for cancer of the esophagus are within the ranges reported in the literature for teams with high prevalence of the disease.

Risk factors related to operative morbidity in patients undergoing gastrectomy for gastric cancer

INTRODUCTION

The purpose of this study is to analyze postoperative morbidity and mortality of patients operated on for gastric cancer in a single institution during the last twenty years, and to define risk factors for complications.

MATERIAL AND METHODS

A retrospective study was carried out on 434 patients who underwent gastrectomy for gastric cancer between January 1983 and December 2002. Analysis of main medical and surgical complications and analysis of morbidity risk factors.

RESULTS

Overall morbidity and mortality rates were 38.4% and 2.7% respectively. The most frequent complications were pneumonia (13%) and intra-abdominal abcesses (12%). The main cause of death was anastomotic dehiscence with abdominal sepsis. The last ten years mortality rate dropped from 4.7% to 0.8%. Risk factors for complications were gender (male, p = 0.01) and resection of spleen (p = 0.02) or pancreas (p = 0.002). A significantly lesser rate of complications was found in patients who had underwent gastrectomy during the previous five years (p = 0.001) or with tumors located in the lower third of the stomach (p = 0,01).

CONCLUSION

Morbidity of gastrectomy for gastric cancer in our institution is still high but mortality has decreased significantly over the last ten years due to the specialization of the hospital and the surgical team. The main risk factor for complications was pancreatosplenectomy in the multivariate analysis.

[The present state of esophageal laparoscopic surgery]

Laparoscopic surgery has changed the therapeutic approach in the most frequent esophageal diseases. With the excellent results in the control of symptoms and the low associated morbidity, surgical treatment is increasingly indicated in benign esophageal pathology as a superior alternative to a chronic and less efficient medical treatment. For the hiatus hernia and gastroesophageal reflux, Nissen's fundoplication by laparoscopy is the technique of choice. The best results in the treatment of achalasia are obtained with Heller's laparoscopic myotomy. This growing experience includes the resection of tumours of the esophagus combining thoracoscopy and laparoscopy with similar results to those of open surgery.

The role of transjugular intrahepatic portosystemic shunt prior to abdominal tumoral surgery in cirrhotic patients with portal hypertension

INTRODUCTION

Major abdominal surgery can be contraindicated in some cirrhotic patients because of severe portal hypertension. The present study reports our experience of three patients with abdominal tumours prepared for surgery by transjugular intrahepatic portosystemic shunts (TIPS) in order to reduce portal hypertension and the risk of intraoperative bleeding.

PATIENTS AND METHODS

Three patients with cirrhosis and portal hypertension diagnosed with a right colon carcinoma, an adenocarcinoma of pancreas and a gastric and sigmoid synchronic tumours in the same patient. Because portal hypertension was the leading cause of surgical contraindication, neoadjuvant TIPS placement was proposed before surgery.

RESULTS

TIPS placement was performed without intra-procedure complications. An average reduction of 18 mmHg was achieved in portosystemic gradients. The planned operations were performed with a delay of 14-45 days after TIPS without intraoperative bleeding. Complications occurred in one patient without operative mortality.

CONCLUSION

TIPS placement allows a pre-operative portal decompression in cirrhotic patients with portal hypertension and abdominal tumours that require surgical treatment. This procedure reduces the risk of bleeding by reducing the portosystemic gradient and the varices around the tumoral area. This procedure is less invasive than conventional shunt surgery, but it is not free of complications and should be performed by experienced interventional radiologists on selected patients. This is still an experimental indication of TIPS which efficacy must be confirmed in larger series.

Comparison between two warm ischemic models in experimental liver transplantation in pigs

BACKGROUND

Experimental models of warm ischemia in liver transplantation have been employed to study the mechanisms and treatment of ischemia reperfusion injury.

METHODS

We compared a control group without (group A, n = 10) versus two models of warm ischemia of liver transplants in pigs: namely, occlusion of the hepatic artery and portal vein for 30 minutes (group B, n = 23) and extraction of the liver 60 minutes after cardiac arrest (group C, n = 5). Liver function tests, coagulation studies, and liver biopsies were performed during the first 24 hours post-liver transplant.

RESULTS

Clamping of the hepatic vasculature in group B produced a significant liver injury compared with the control group: elevation of the ALT and an abnormal 1-hour post-revascularization biopsy similar to that observed in the cardiac arrest group C. The transaminase levels were lower among group A animals (P <.05). But the hepatic synthetic functions as reflected in the protrombin time (PT) were not affected in group B versus group A. The alteration in PT with respect to the initial value was similar among group A and group B animals, which were significantly less than that in group C (P <.05).

CONCLUSIONS

Occlusion of the hepatic artery and portal vein, a simple surgical maneuver, causes moderate damage to a liver graft but less alteration of hepatic synthetic function. Clamping of the hepatic vasculture obtains more long-term survivors after OLT than cardiac arrest.

[Role of extended type R2 lymphadenectomy in the surgical treatment of resectable gastric cancer]

The extended lymphadenectomy has been proposed as routine procedure in the surgical treatment of gastric cancer, although some controversies have been published. We present a retrospective analysis on the impact of extended lymph node dissection after total gastrectomy, in terms of post-operative course and histopathologic findings, in a group of 30 patients with R2 lymphadenectomy and in 16 patients with R1 lymphadenectomy. There were no significant differences in duration of operation, amount of blood transfusion and length of hospital stay between the 2 groups. The only significant difference was found in the greater amount of drainage output after R2 lymphadenectomy as compared with R1. There were no mortalities in either group and morbidity rate was similar for both [43% in R1 and 40% in R2) mostly in the form of abdominal infections (18% in R1 and 16% in R2]). A significantly greater number of lymph nodes was identified after R2 gastrectomy. Fifty-three per cent of patients has positive lymph nodes, 12% of them being from the N2 echelon of nodes (including one case of early gastric cancer). Careful lymph node dissection in gastric cancer surgery allows a more precise staging of the tumor with no increase in postoperative morbidity.

[Resection of hepatic metastases of colo-rectal carcinoma. Indications and initial results]

We report our initial experience in the resection of metastases from colo-rectal cancer confined to the liver. Seventeen hepatic resections were performed in sixteen patients over a thirty-eight months period. Median age was 58 years (45-75). The extent of liver involvement was assessed by computerized tomographic portography and magnetic resonance. In fourteen cases there was a solitary lesion. Mean interval time between colo-rectal resection and hepatic resection was 18 months (0-69). Twelve major hepatic resections and five wedge resections were performed. There was not operative mortality. Seven patients received complementary chemotherapy. Mean follow-up was 14.8 months (2-34). One patient died from carcinoma of the lung, five patients (31.25%) are alive with recurrence of some sort (three recurrences being in the liver) and ten patients (62.5%) are free of disease. Indications for resection, methods used for identification of candidates, prognostic determinants and indications for complementary chemotherapy are discussed.

[Cancer of the esophagus (II): the results of surgery, anatomicopathological study and patient survival]

We present a retrospective study of 68 esophageal cancer patients treated with surgery between 1975 and 1991. Results showed a resectability of 73.5% with the most frequent surgical approach being a Lewis esophagectomy. The mean hospitalization time was 24.7 days with a postoperative mortality of 7.3%. Other complications included anastomotic leakage, wound infection, sepsis and pulmonary disorders. Over-all survival at 3 years was 17.3%, reaching 24% in resected patients. Survival according to lymph node involvement was 13.4% for lymph node positive patients and 34.5% for node negative patients. According to histopathologic stage, survival rates were 34.6% and 8.59% for early and advanced tumor respectively, the difference being statistically significant using the Mantel-Haenszel test.

[Cancer of the esophagus (I): its epidemiological, clinical and diagnostic assessment according to histological type]

From 1975 to 1991, sixty-eight patients were treated with surgery for esophageal cancer at the Clínica Universitaria de Navarra. This study involves an analysis of epidemiologic and predisposing risk factors in relation with the histologic type of tumor: epidermoid carcinoma vs. adenocarcinoma. The difference in mean age of males (60.5 yrs.) as compared with that of females (48.7 yrs.) was statistically significant (p < 0.05). Likewise, the mean age of patients with epidermoid carcinoma (57.8 yrs.) was significant lower (p < 0.01) as compared with that of those with adenocarcinoma (66.3 yrs.). Smoking and alcoholism were common in the group of patients with epidermoid carcinoma, while Barrett's esophagus and hiatal hernia were frequently seen in patients with adenocarcinoma. Dysphagia was the most frequent symptom both at the start of disease (75%) and with the diagnosis established (96.7%). There was no significant difference in the symptomatology of patients with one type of tumor or the other. The efficacy of ancillary diagnostic procedures such as barium swallow, esophagoscopy, computerized tomography and biopsy were likewise assessed. The most frequent site of tumor was at the middle third, with majority of patients being at clinical stage 1-2 of disease at the time of diagnosis.