Laparoscopic surgery for cancer patients

Minimally invasive techniques such as laparoscopy are now being used frequently in nearly all fields of surgery. The explosion of these procedures can be traced to the development of high-resolution video monitors in the early 1980s. Previously, only one surgeon could view the abdominal cavity through the laparoscope. With a high-resolution monitor and a camera attached to the end of the laparoscope, the surgeon and all assistants can comfortably view a high-quality magnified image, and they can perform surgical procedures using delicate laparoscopic instruments. The potential benefits to the patient include less pain, decreased hospitalization, and earlier return to normal activities. Concern exists, however, about the rapid application of minimally invasive surgery to a wide variety of procedures. Adequate training, patient selection, unforseen complications, and appropriate credentialing are some of the issues that have arisen. The use of these procedures in the cancer patient is the subject of increasing excitement and controversy. Laparoscopic surgery dates back to the 1900s. Before the turn of the century, instruments were developed to look into human organs such as the stomach and bladder. The first minimally invasive abdominal examination, cystoscopic examination of the abdominal cavity of a dog, was reported in 1901 by Kelling.5 In Russia during the same year a German physician performed the first laparoscopic procedure on a human.6 Ten years later, Jacobaeus used thoracoscopy and laparoscopy to diagnose several disease states, including malignancy.7 A variety of experiences reported in the 1920s revealed that the abdominal cavity could be viewed through a scope in numerous patients without morbidity and that the procedure could be done under local anesthesia without a hospital stay.7 In the 1930s, Fervers recommended the use of carbon dioxide to establish pneumoperitoneum,6 and Veress suggested the spring-loaded needle that is used today for insufflation of the abdomen.8 During this period Ruddock reported on the first significant series of laparoscopic procedures, 500 laparoscopies (including 39 biopsies) over a 4-year period.5 The slow development of laparoscopic technology over the next several decades inhibited the adoption of minimally invasive techniques by the surgical community. During the 1960s, however, laparoscopy was widely used by gynecologists, mainly as a diagnostic tool.9 During this time Semm, a German gynecologist and engineer, developed an automatic insufflation device for monitoring gas flow and intraabdominal pressure.5 He and others developed a variety of laparoscopic instruments. In 1982 Semm was the first to report on performance of a laparoscopic appendectomy.10 In 1985, with the aid of the endoscopic camera and video monitor, the first laparoscopic cholecystectomy was performed by Muhe in Germany,11 and in 1987, a series of laparoscopic cholecystectomies was begun in France.12 By the end of the decade, laparoscopic cholecystectomy had begun to spread throughout the general surgical community in the United States.13 The widespread adoption of laparoscopic cholecystectomy may have been more rapid than that of any other health care technology in history.14 Inevitably, the expansion of minimally invasive procedures soon included diagnosis and treatment of malignancies. Although minimally invasive techniques have been used for treating cancers of the colon, lung, upper gastrointestinal tract, pelvic organs, and other organs, reports have been published expressing concern about the safety of these procedures15 and even about the safety of insufflation of the abdominal cavity in the patient with an abdominal malignancy.16 This review discusses several minimally invasive techniques for diagnosis and treatment of malignancies by the general surgeon and explores some of the controversies that have arisen from these procedures. Focal points include the use of laparoscopic surgery for diagnosis and staging of abdominal malignancies, therapeutic resection by laparoscopy, and laparoscopic procedures for palliation. Laparoscopic colon resection, laparoscopic adrenalectomy, and laparoscopic cholecystectomy in a patient with unsuspected carcinoma are reviewed individually. A look at the future of laparoscopic surgery and issues such as training and credentialing concludes this review. Laparoscopy is now considered an effective tool for diagnosis and staging of malignancies, one that adds to the information provided by other noninvasive diagnostic modalities, especially when combined with laparoscopic ultrasonog-raphy.17-19 It is a less invasive alternative to laparotomy for staging of intraabdominal malignancies. Many authors have advocated the use of diagnostic laparoscopy in conjunction with other diagnostic modalities. Laparoscopy has been shown to decrease significantly the incidence of unnecessary laparotomy for unresectable disease in up to 67% of patients with abdominal malignancies (Table 1). Many of these studies were done with early-generation computed tomography (CT) scans as part of the noninvasive work-up. Lowy et al21 and Burke et al,22 however, have shown that diagnostic laparoscopy continues to have significant advantages in preventing unnecessary laparotomy in patients with gastric cancer even when current-generation CT scanning is used in the diagnostic work-up. One concern in using diagnostic laparoscopy for the staging of abdominal tumors is the invasiveness of the technique, which currently requires general anesthesia, and the potential complications and costs related to it. The use of diagnostic laparoscopy for staging as a separate procedure is controversial, especially for abdominal tumors in which the diagnostic yield of laparoscopy is low (e.g., colorectal and lower esophageal cancers). Many studies, especially recent ones, used laparoscopy immediately before a planned laparotomy.20-22, 26, 31, 32 In these studies, all patients had been found to have resectable tumors based on preoperative noninvasive studies, and laparoscopy was used for diagnostic staging at the same time that laparotomy was to be performed. When laparoscopy is performed at the time of laparotomy, the unnecessary performance of laparoscopy is less of a concern. Laparoscopic evaluation of the abdomen can be performed in as little as 10 to 15 minutes, and such evaluation eliminates the need for laparotomy in many patients. Thus, it is recommended that diagnostic laparoscopy for staging an abdominal malignancy be performed at the time of planned laparotomy. Laparoscopic staging of an abdominal malignancy should be done at the same time as a planned laparotomy. Many authors have stressed the importance of laparoscopic ultrasonography during diagnostic laparoscopy for abdominal malignancy.18, 23, 27, 28, 32 Ultrasonography during laparoscopy gives the surgeon information that otherwise would not be obtained from laparoscopic visual exploration. Ultrasonography can identify lesions deep in the parenchyma of an organ, especially in solid organs such as the liver and pancreas. It can evaluate invasion of a tumor into other structures, such as major vessels, thus determining that the tumor is not resectable in a patient who otherwise might undergo laparotomy. John et al23 evaluated patients who had potentially resectable liver tumors with laparoscopy and laparoscopic ultrasound. In 14 of 43 patients (33%), laparoscopic ultrasound detected liver tumors missed upon laparoscopic inspection alone. Laparoscopic ultrasound provided more information about tumor re-sectability than did laparoscopic inspection alone in 18 of 43 patients (42%). In a study of patients with pancreatic cancer, John et al27 used laparoscopic ultrasonography to determine resectability. Factors confirming nonresectability were shown by laparoscopic ultrasonography in 23 patients (59%). In 20 of 38 patients (53%), laparoscopic ultrasonography identified information relevant to the assessment of tumor stage that was not apparent during laparoscopic inspection. In another study using laparoscopic ultrasonography, Bemelman et al25 found that 21 of 22 pancreatic tumors staged as resectable at laparoscopy actually were resectable. Thirteen of 14 patients thought to have unresectable tumors at laparoscopy actually did have unresectable tumors. Laparoscopy's ability to visualize directly intraabdominal areas and structures gives it a significant advantage over other diagnostic modalities. Direct visualization has been used to characterize abdominal lesions. For example, specific diagnostic and characteristic features have been identified for hepatocellular carcinoma.33, 34 Much of the abdominal cavity can be viewed on initial introduction of the laparoscope. Areas obscured from the initial view often can be seen with the use of instruments introduced through accessory ports for retraction and dissection and adjustment of the table for appropriate patient positioning. Entering the lesser sac, for example, requires dissection and retraction as well as reverse Trendelenburg positioning to most adequately and easily expose the anterior surface of the pancreas. Obtaining biopsies of organs, lymph nodes, and suspicious lesions during laparoscopy is an important part of the diagnosis and staging of malignancies. Laparoscopic guidance of liver biopsy has been shown to be a safe and effective alternative to open liver biopsy, and it significantly decreases hospital stay.35 A skilled laparoscopic surgeon should be able to perform biopsies of most intraab-dominal areas and organs and recognize suspicious lesions that require biopsy to rule out malignancy. The principles of minimally invasive surgery for diagnosing and staging malignancy also have been applied to children with thoracic and abdominal cancers. Holcomb et al36 showed that the success rate of tissue biopsies was high (99%) and morbidity was minimal with no mortality. Laparoscopy also has been used in patients with cancers outside the abdominal and thoracic cavities who had abdominal symptoms. Laparoscopic diagnosis and management of these patients was a safe, effective alternative to an open procedure.37, 38 Primary carcinoma of the lower esophagus and stomach can be cured by surgical resection if it is found early. Unfortunately, these tumors often have spread by the time the diagnosis is made. Preoperative ultrasonography and CT scanning have been shown to be poor predictors of resectability in patients with lower esophageal or gastric cancers, especially when small-volume peritoneal and hepatic metastasis are present.39, 40 Many authors, therefore, have advocated the use of diagnostic laparoscopy in addition to non-invasive modalities to assess these patients for metastatic disease.24,26,36 Although some studies of intraperitoneal chemotherapy for patients with gastric cancer and peritoneal seeding suggest that gastric resection and perioperative intraperitoneal chemotherapy may be appropriate, laparoscopy still may be of benefit in these gastric cancer patients. Watt et al41 showed that laparoscopy was more effective than CT scan and ultrasonography in assessing nodal involvement among esophageal and gastric cancer patients. The sensitivities of laparoscopy, CT scan, and ultrasonography were 72%, 57%, and 52%, respectively. The addition of laparoscopy to the preoperative evaluation has increased resectability rates at the time of laparotomy to a range of 56% to 100% in several studies.16–18,20,24,36 In lower esophageal cancers, when resectability is still in question after noninvasive studies and laparoscopy, diagnostic thoracoscopy of the right chest may be performed.42 Laparoscopy aids significantly in the assessment of suspected primary or metastatic hepatobiliary malignancy. Radiographic studies such as ultrasonogra-phy, CT angiography, and magnetic resonance (MR) imaging are helpful in determining the diagnosis and resectability of hepatobiliary cancers. Laparoscopy, however, has opened the door to further evaluation, allowing direct visualization of the entire abdominal cavity and access to several areas for biopsy. In addition, laparoscopic ultrasound and laparoscopicguided biopsy can distinguish between benign and malignant hepatic disease and can identify small peritoneal metastases (less than 1 cm) that might be missed on noninvasive studies. When a hepatobiliary malignancy is diagnosed, staging by laparoscopy can be safe and beneficial. Hemming et al29 studied 168 patients who underwent laparo-scopic staging for malignant tumors (chiefly hepatobiliary tumors) in the abdomen. They reported a 1.8% overall complication rate and no mortality. Several studies have shown that laparotomy can be avoided in a significant number of patients with hepatobiliary cancer when laparoscopy shows that the disease is not resectable.19,22,25,28 Avoiding laparotomy can decrease hospital stay, which averages 5.6 days after laparotomy compared with 1.5 days after laparoscopy. Although pancreatic cancer has a resectability rate of 5% to 10%, laparotomy for pancreatic tumors was justified in the past. Laparotomy provided histologic diagnosis of the primary tumor or showed extrapancreatic spread and allowed for a palliative procedure for obviously unresectable tumors.43, 44 With the current capabilities of radi-ologic and endoscopic techniques, including biopsy, most pancreatic tumors can be diagnosed and palliated without surgery. In patients whose tumors still appear re-sectable after noninvasive studies, laparoscopic evaluation is being used for diagnosis and staging so that laparotomy can be avoided, if possible. Studies have shown that laparoscopic biopsy of extra-pancreatic tissue suspected of harboring metastatic disease and complete abdominal evaluation, including peritoneal washings for cytologic studies, can prevent a significant number of unnecessary laparotomies.45, 46 Although laparoscopy has been shown to predict nonresectability reliably, thereby eliminating the need for laparotomy, it does not necessarily predict resectability reliably. In a series of 73 patients with pancreatic cancer, Cuschieri44 found that only four of nine tumors thought to be resectable upon laparoscopic examination actually were resectable at laparotomy. Surgery for lymphoma has been limited to procedures that help in the diagnosis and staging of the disease. In Hodgkin's disease, staging laparotomy can alter the treatment strategy in some groups of patients by changing the stage of the disease to a later one than that determined by noninvasive means. Studies have shown that after laparotomy, a change in stage can be expected in 20% to 30% of patients with clinical stage I and II disease.47, 48 Laparoscopic biopsy of the liver and spleen combined with imaging studies can decrease the need for staging laparotomy by 70% in patients with clinical stage I or II Hodgkin's disease.48, 49 Now that more laparoscopic splenectomies are being performed, case reports of laparoscopic staging for Hodgkin's disease have been published. These reports show that the entire procedure (including paraaortic lymph node dissection, bilateral liver biopsies, splenectomy, and oophoropexy) can be performed laparoscopically.50, 51 Although only a few patients with Hodgkin's disease are considered candidates for staging laparotomy, the use of laparoscopy for staging is a significant advantage for them. Patients have less postoperative pain and a shorter hospital stay and postoperative recovery period after staging laparscopy than they do after staging laparotomy. Laparoscopy has a limited role in non-Hodgkin's lymphoma. It is used primarily to obtain a sufficient amount of tissue to aid in diagnosis. The addition of laparoscopic-guided biopsy doubles the diagnostic yield compared with that obtained by percutaneous biopsy alone.52 The importance of sampling the liver and spleen in cases of lymphoma makes direct visualization during biopsy a distinct advantage over other modes of percutaneous biopsy. Visualization of the parenchyma of the liver and the spleen after biopsy can help the operator avoid prolonged bleeding from the biopsy site. Any increased bleeding can be controlled laparoscopically with direct pressure, electrocautery, argon laser coagulation, application of hemostatic material, or suturing. With current laparoscopic capabilities, patients with lymphoma can be accurately diagnosed and staged without laparotomy. The benefits of decreased pain, decreased hospitalization, earlier return to normal activities, and the ability to begin chemotherapy treatments earlier than after laparotomy make laparoscopy an important option in the diagnosis and staging of the patient with lymphoma.53 Most indications for pelvic lymphadenec-tomy are within the realm of urologic and gynecologic surgery. Several reports evaluating laparoscopic pelvic lymphadenectomy for staging prostate cancer have shown significant benefits, which include decreased pain, decreased hospital stay, and decreased use of laparotomy.54, 55 Laparoscopic pelvic and retroperitoneal lymphadenectomies have been used for staging other urologic tumors, such as bladder,56 penile,56, 57 and nonseminoma-tous testicular cancers.58 The large number of laparoscopic pelvic lymphadenectomies performed for prostate cancer raised concerns about the low yield of positive lymph nodes (sometimes less than 5%) and the incidence of port site metastases.59 To avoid unnecessary surgery, patients who are unlikely to have metastatic disease should not undergo laparoscopic staging. Therefore, laparoscopic pelvic lymph node dissection is limited to patients with prostate cancer who have a high likelihood of metastatic disease as predicted by preoperative clinical staging, prostate-specific antigen levels, and Gleason grade.60, 61 For gynecologic tumors, laparo-scopic pelvic lymphadenectomy has focused primarily on cervical and early endometrial cancers.62, 63 Studies have shown that an adequate lymph node sample can be obtained with the laparoscopic approach; compared with open surgery, the hospital stay is shorter, but a low complication rate is maintained.64, 65 More prospective randomized studies are needed to determine the role of laparoscopic pelvic lymphadenectomy in gynecologic malignancies. A significant learning curve for laparoscopic pelvic lymphadenectomy has been identified.63, 66 General surgeons may play a role in the adoption of this procedure because of their familiarity with the laparoscopic pelvic anatomy if their experience includes a significant number of laparoscopic herniorrhaphies. These techniques can be adopted most safely when surgeons familiar with laparoscopic anatomy help other surgeons through their learning curve. Other general surgical applications of laparoscopic pelvic lymphadenectomy are rare and include staging for cutaneous or soft tissue malignancies, especially malignant melanoma.67 The use of minimally invasive techniques for curative resection of abdominal malignancy is controversial. The growth of laparoscopic capabilities has resulted in reports of the resection of most types of abdominal tumors and organs. Although the reports have shown that these procedures can be done, determining when laparoscopic resection of cancer should be performed is difficult. Because of the concerns surrounding laparoscopic resection of cancer and the difficulty associated with doing these procedures, laparoscopic resection of abdominal tumors rarely has been performed except in two areas. One is laparoscopic adrenalectomy, which is being done increasingly more often. The greater experience with laparoscopic adrenalectomy has been aided by the fact that a significant mumber of these resections are performed for benign tumors. The other exception is laparoscopic resection for colorectal malignancy. The high incidence of colorectal disease has led to increased experience with laparoscopic colon resection. Laparoscopic curative resection of gastric cancer has been reported.68–71 The approaches used depended on the extent of the tumor. For early gastric cancers or smooth muscle tumors, some authors used a technique of laparoscopic intragastric resection or a combined laparoscopic-gastroscopic technique that employed standard laparoscopic ports and instruments to perform a wedge resection of the lesion from within the gastric lumen.68, 71 Other reports of resection for early gastric cancers describe laparoscopic distal gastrectomy with a primary anastomo-sis.69, 70 These resections include a perigas-tric lymphadenectomy similar to what would be done in an open gastrectomy for cancer. Jagot et al72 reported on nine patients who underwent laparoscopic gastric mobilization and lymphadenectomy for esophageal cancer. These patients had combined open incisions (six through the right side of the chest and three through the left side of the neck) for esophageal resection and anastomosis. All intraabdominal portions of the procedures were completed laparoscopically. Mean hospital stay was 10.3 days, and no complications occurred. The patients in these reports of laparoscopic gastric surgery did well with no complications in short-term followup; however, all reports included 10 patients or fewer. Using early gastric cancer or gastric lymphoma as an indication, an Italian group performed only 10 laparoscopic gastrectomies in more than 100 patients with gastric cancer in a 4-year period,73 showing the infrequent use of laparoscopic resection for gastric cancer. In an international review of laparoscopic gastrectomies, Goh et al70 sent surveys to many surgeons known to have performed laparoscopic gastrectomies. Among 118 laparoscopic gastrectomies performed, gastric cancer was the most common indication for the procedure (46 patients). The indications for laparoscopic resection of gastric cancer must be limited to palliation of advanced gastric cancer and possibly treatment of early gastric cancer. The use of laparoscopy for resection of stage II or III gastric cancers must be evaluated in prospective randomized studies. The infrequent use of laparoscopic resection of gastric cancer, however, makes it difficult to evaluate this technique for future use. Even more difficult is training the inexperienced laparoscopic surgeon to perform and safely adopt this technique. Laparoscopic resection of gastric cancer is indicated only for palliation of advanced gastric cancer and possibly for treatment of early gastric cancer. Still fewer reports have been published on laparoscopic resection of other upper quadrant abdominal cancers. Laparoscopic resection of benign liver tumors measuring up to 9 cm in diameter has been reported using electrocautery, ultrasonic dissection, and endoscopic stapling devices to ensure minimal blood loss.74 Laparoscopic liver resection for malignant disease has also been reported for smaller lesions.75, 76 Reports of laparoscopic distal pancreatectomy with splenectomy have shown the benefits of decreased pain and shorter hospitalization compared with open surgery.77 Gagner and Pomp78 have even reported three pancreatoduodenectomies performed laparoscopically. However, each case required a significantly prolonged operative time, and the benefits of minimally invasive surgery, such as a decreased hospital stay, were not realized. Laparoscopic splenectomy has been discussed in the context of staging for Hodgkin's disease, and many authors have reported good results from laparoscopic splenectomy for a variety of diseases.79, 80 However, primary or metastatic carcinoma of the spleen would be a rare indication. Other curative laparoscopic procedures, such as laparoscopic resection of small bowel carcinoma, are feasible, but the reported experience is too limited to be a basis for evaluation. Partially because of the few clinical reports on laparoscopic resection for gastric, hepatic, pancreatic, splenic, and small bowel carcinomas, authorities currently believe that curative laparoscopic resections should not be performed routinely until further experimental investigations and clinical studies The first case of laparoscopic adrenalectomy was reported by Gagner in many surgeons have the safety and of the laparoscopic for of the including bilateral Several series of laparoscopic have shown that the procedure results in a hospital stay with morbidity and (Table with open resection, laparoscopic adrenalectomy has less blood a decreased for pain a shorter hospital stay, and an earlier return to normal and Although the most common indications for laparoscopic adrenalectomy were primary and cases of primary and carcinoma metastatic to the were The laparoscopic approaches used for adrenalectomy have included and with The for of the entire abdominal including the without the The however, considered the for of the The has the is less than and the learning curve is than that of the The most common complication of laparoscopic adrenalectomy has been combined with poor was the most common for to an open other complications or and only one were one the importance of of the and the use of a for Gagner et reported a case in which the into the in prolonged that without Most large than cm) and of invasion of surrounding structures to be to laparoscopic adrenalectomy, and some a For other however, the laparoscopic is the for of the if the surgeon is skilled in open adrenalectomy and in advanced laparoscopic Laparoscopic colon resection is one of the most performed advanced laparoscopic procedures. In with open colon resection, the laparoscopic the patient decreased blood earlier return of bowel shorter hospital stay, and hospital Many series of laparoscopic including resection for malignant disease, have reported the safety and of laparoscopic colon surgery (Table The benefits of minimally invasive have been shown even in and these studies, laparoscopic colon resection is still controversial, especially for the management of colon One concern about the laparoscopic for treatment of colon cancer is laparoscopic techniques can resection wide and resection of areas of lymph node of the Studies of and the of major and the amount of lymph nodes after resection of the colon to show that laparoscopic techniques could to principles of cancer The of has been by several studies, which showed that the number of lymph nodes laparoscopically was similar to the number in open for The technique of laparoscopic colon resection also has been controversial. surgeons have performed laparoscopic colon resections as to The one or more of the example, the outside the peritoneal cavity through a small When a laparoscopic is all of the procedure are performed within the abdominal Studies these two techniques have shown no significant in the of the the of postoperative or the of hospital With the spread of laparoscopic techniques, another concern is the by which a surgeon adequately to do a laparoscopic colon resection for cancer. in the have that the current or training are is by studies showing that the learning curve by operative time, of and of to an open to from 10 to must to obtain training after these and for from surgeons who are more with laparoscopic such as when to to an open is also to the safe adoption of the laparoscopic for indications for to an open procedure include tumor invasion into small and or