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Kardiochirurgia i Torakochirurgia Polska/Polish Journal of Thoracic and Cardiovascular Surgery
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4/2012
vol. 9
 
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Transthoracic versus transhiatal esophagectomy

Mariusz Łochowski
,
Łukasz Pryt
,
Daniel Brzeziński
,
Józef Kozak

Kardiochirurgia i Torakochirurgia Polska 2012; 9 (4): 439–442
Online publish date: 2013/01/14
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Introduction

There are many esophageal cancer surgery methods, the oldest of which is the transthoracic approach with thoracic anastomosis (the Lewis-Tanner approach) or cervical anastomosis (the McKeown approach). In the 1970s, Orringer introduced the transhiatal approach in order to diminish the number of cardiac and pulmonary complications resulting from thoracotomy. With the introduction of endoscopic methods (laparoscopy, thoracoscopy), surgeons began to employ minimally invasive procedures for esophagectomy [1, 2]. All these methods have their flaws and merits. In the present study, we wish to present our own experience related to the methods of transthoracic and transhiatal surgery and to qualifying patients for these procedures.

Aim of the study

The aim of this study is to compare patient qualification and treatment results for esophageal/cardia carcinoma patients treated with open transthoracic esophagectomy (TTE) and with transhiatal esophagectomy.

Material and methods

During the years 1996-2011, 1705 patients were treated for esophageal and cardia cancer. 273 patients (16%) were treated radically, while the remaining 1432 were provided palliative care. Analysis was conducted on 102 patients (24 women, 78 men) aged 19-75 (mean – 59.5) who had been treated radically for esophageal/cardia cancer within the last 5 years. The patients did not receive neoadjuvant chemoradiotherapy. The examination of the patients qualified for surgery included history taking, physical examination, laboratory examination, contrast x-ray of the esophagus, endoscopic examination along with obtaining histopathological samples, thoracic and epigastric tomography, ultrasonography of the abdominal cavity and of the neck, bronchoscopy (neoplasms of the cervical as well as upper and middle thoracic esophagus).

Two types of surgery were performed on the patients: open surgery (McKeown approach) in 38 cases and transhiatal surgery (Orringer approach) in 64 cases.

Two-field lymphadenectomy was performed on the epigastrium and thorax.

The stomach was used as the esophageal substitute (conduit) for all patients. It was moved through the posterior mediastinum. The anastomosis of the proximal esophageal stump (ca. 2 cm) with the conduit was performed by left-sided cervicotomy. The semi-mechanical technique (side-to-side Collard method) was employed in all patients. A tube was inserted through the anastomosis to the conduit, introduced to the esophagus through the nose. A Redon drain was used for draining the vicinity of the anastomosis. A feeding jejunostomy was performed on the proximal segment of the small intestine. Most patients also underwent pyloromyotomy. Antithrombotic and antibacterial prophylaxis was conducted as well. During the first two postoperative days, the patients were provided with intravenous nutrition. Subsequently, enteral nutrition was provided using standard nutrition formulas.

Postoperatively (on the 6th day), a contrast (Gastrografin ) radiological examination was conducted and the healing (tightness) of the cervical anastomosis was evaluated. In a later period (up to 3 years) its adequacy (width) was assessed.

The following factors that could influence treatment results were analyzed: age, nutritional status, presence of concomitant diseases, location of the tumor, perioperative blood loss, surgery duration, stage of the cancer, invasiveness of the procedure, presence of complications.

The examination results were noted in a Microsoft Excel spreadsheet (MS Office 2007) and were analyzed statistically with the chi-squared test, the Shapiro-Wilk test and the Mann-Whitney test. Statistically significant difference was set at p < 0.05 for all statistical comparisons.

Results

Notwithstanding the difference in the number of patients, the compared groups undergoing the two procedures were homogeneous in terms of age, nutritional status and concomitant diseases (Tab. I).

The patients qualified for open transthoracic surgery were at more advanced TNM stages (63% at stage III) and the tumor was located in the closer segment of the esophagus. The patients qualified for transhiatal surgery were at less advanced TNM stages (53% at stage III) and the tumor was located closer to the cardia. The most frequent tumor type for transthoracic surgery was squamous carcinoma (84% of cases), while the most frequent type of tumor for transhiatal surgery was adenocarcinoma (64% of cases), which was statistically significant at p < 0.0001 (Tab. I). Postoperative complications occurred in 42% of the patients, with different frequency in the two groups. The transthoracic surgery patients required a respirator more often, while the transhiatal surgery patients were more prone to intraoperative arrhythmias and pulmonary complications (pleural effusion or pneumothorax). The groups did not differ in terms of abdominal complications or mortality (Tab. III). The duration of transthoracic surgery was 30 min longer than in the case of transhiatal surgery (150 vs. 180 min on average) (Tab. II). R0 resection was attained in 95% of transthoracic surgery patients and in 86% of transhiatal surgery patients. R2 resection was only noted among transhiatal surgery patients (6%). Statistically (p < 0.05), more lymph nodes were removed during the transthoracic surgery than during the transhiatal surgery (Tab. IV).

Discussion

For many years, the two most frequently used techniques for esophageal surgery were a matter of debate and controversy [2-4]. Patients with tumors located in the upper and middle thoracic esophagus require transthoracic surgery. Such tumors are typically at more advanced stages of the TNM classification and are rarely adenocarcinomas. Patients with tumors located in the lower thoracic esophagus and in the cardia qualify for transhiatal surgery. Such tumors exhibit less advanced TNM stages and are more frequently adenocarcinomas. Complication rates after esophagus surgery are estimated to reach as high as 81% [5]. In the material that we analyzed the percentage of complications was 44%. Each technique has its own typical complications. Barghetto et. al., during a congress in Mexico in 2004, presented studies in which the percentages of complications after open surgery, transhiatal surgery and minimally invasive surgery were 61%, 59%, and 38%, respectively [2]. The analysis of our material indicated a larger percentage of complications (47%) for the transhiatal method. An opposite relationship was presented by Donohoe in a study published this year [6]. In this analysis of transthoracic and transhiatal operations, based on 584 cases, there was a higher percentage of complications for open surgery (44.2%) than for transhiatal surgery (31.6%). Respiratory disturbance is more common in the case of transthoracic operations, while cardiac arrhythmias, pneumothoraces and pleural effusions are more frequent in the case of transhiatal operations [7-9]. Orringer demonstrated intraoperative pleural damage in as many as 75% of patients [10]. In our material, we noted only four cases of pneumothorax after transhiatal surgery (6.3%). The frequency of damage to the recurrent laryngeal nerve is estimated at 7% and it is more common in the case of the transhiatal approach [5, 10]. In our material, there were no cases of damage to the recurrent laryngeal nerve, due to carefully conducted dissections (particularly cervical ones). We also did not note any cases of chylothorax, which is estimated at 1-3% of complications in the medical literature [2, 10]. Many studies have demonstrated increased blood loss in the case of open operations [5, 11, 12]. The examination conducted by our medical center demonstrated a statistically significant difference (p < 0.0001) in blood loss during open surgery. Blood loss during the operation may result in secondary ischemia of the anastomosis. As early as 20 years ago, Devar demonstrated the influence of this phenomenon on the frequency of occurrence of leaks and secondary strictures in the cervical esophagogastric anastomosis [13]. A similar relationship was noted in another, earlier study, which we conducted at our medical center. Patients with anastomotic leaks exhibited a statistically significant (p < 0.01) increase in blood loss during the procedure [14]. Some authors list better access to mediastinal lymph nodes among the advantages of the transthoracic procedure [1, 8]. In our study, we demonstrated a significantly (p < 0.05) larger number of lymph nodes being removed in the transthoracic procedures. The duration of both procedures that we conducted was similar and was 150 and 180 minutes for the transthoracic and for the transhiatal approach, respectively. When minimally invasive methods are employed, the duration of the procedure is significantly increased (up to 400 min) [5, 12].

Conclusions

Selecting the proper surgical procedure for cancer of the esophagus/cardia depends on the stage of the disease and on the location of the tumor. Transhiatal operations are shorter and put less strain on the patient, while transthoracic operations are characterized by increased blood loss. However, the complication and mortality rates are similar for both procedures.



The work was presented at the Congress of the Polish Society of Cardiothoracic Surgeons, 24-26.05.2012, Krakow, Poland.

Literature

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Copyright: © 2013 Polish Society of Cardiothoracic Surgeons (Polskie Towarzystwo KardioTorakochirurgów) and the editors of the Polish Journal of Cardio-Thoracic Surgery (Kardiochirurgia i Torakochirurgia Polska). This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International (CC BY-NC-SA 4.0) License (http://creativecommons.org/licenses/by-nc-sa/4.0/), allowing third parties to copy and redistribute the material in any medium or format and to remix, transform, and build upon the material, provided the original work is properly cited and states its license.
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