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PubMed2005

[Results of laparoscopic antireflux surgery at five years and beyond].

Laparoscopic antireflux surgery was first introduced in 1991. As with any new technique, there was a learning curve during which surgeons had a unique opportunity to prospectively document the evolution of the technique and its results. We have regularly assessed our results and conducted randomised prospective studies with the aim of obtaining solid long-term outcome data. We now have at least 5 years of follow-up for two groups of patients. Group I consists of the first 178 patients who underwent fundoplicature, i.e. during the learning curve. Group II consists of 107 patients who were enrolled in a randomised trial comparing total fundoplicature with anterior partial fundoplication. The re-operation rate was 15% in Group I and only 6% in Group II. Overall, about 85% of patients were free of reflux symptoms 5-8 years after fundoplication, indicating that laparoscopic surgery provides a durable benefit in the vast majority of patients.

Adult↗

PubMedDate not supplied

Laparoscopic radical prostatectomy: a European virus with global potentials.

OBJECTIVES: To review the current status of the Laparoscopic Radical Prostatectomy in Europe (LRP). METHODS: The published peer reviewed articles on the experience of the European groups performing Laparoscopic Radical Prostatectomy. RESULTS: Three different approaches have been described for LRP, two of them transperitoneally (early dissection of seminal vesicles or of the prostatic apex) and one totally extra peritoneally. Results in terms of per operative performances and immediate outcomes seem to be comparable with the exception of the bleeding and the transfusion rate that seem higher in the transperitoneal approach with early dissection of the prostatic apex. Conversion rates have been described up to 5% but it is rare after the 20 first cases; after the learning curve has been overcome the complication rate varies between 10% and 17%. Being a novel technique, all the series have a short median follow-up of around one year. The one-year continence rates are comparable to the ones described with the classical open approach, as it is the potency rate. The rate of positive margins bounces between 2 and 49% depending mainly on case selection. A long and steady learning curve burdens the technique in terms of complications. CONCLUSIONS: LRP is feasible, teachable and reproducible. Although no comparative series with the open approach are available yet, functional and oncological results seem to be comparable to the ones reached after open Retropubic Radical Prostatectomy.

Adenocarcinoma↗

PubMed2005

Endoscopic adrenalectomy: an analysis of the transperitoneal and retroperitoneal approaches and results of a prospective follow-up study.

BACKGROUND: Endoscopic adrenalectomy is currently performed using either a retroperitoneal or transperitoneal approach. The aim of this study was to determine which of these is the optimal surgical technique in a prospectively designed analysis of a large series of patients operated on by a single team over a 10-year period. METHODS: From February 1994 to March 2004, 267 endoscopic adrenalectomies (retroperitoneal in 132 patients and transperitoneal in 135 patients) were performed in 245 consecutive patients. There were 102 right lateral and 121 left lateral procedures (22 patients had a bilateral procedure). The most prevalent indication was incidentaloma (35.9%), followed by pheochromocytoma and Conn's adenoma. RESULTS: The endoscopic procedure was performed in 238 of 245 patients (97.1%). The conversion rate was 1.5% for the transperitoneal approach and 3.8% for the retroperitoneal approach. No statistically significant influence was noted for the parameters of intraoperative blood loss, rate of postoperative complications, and duration of hospital stay with regard to the surgical technique. The operative time and the learning curve proved to be significantly longer for the retroperitoneal adrenalectomy. In addition, a variance analysis identified tumor size (>5 cm) as a significant factor influencing the operative time, whereas body mass index and localization (right/left lateral) did not prove significant. CONCLUSION: Independent of the underlying pathology, endoscopic adrenalectomy using either the trans- or retroperitoneal approach can be performed in 96-98% of all patients. Differences between the two techniques in operative time and learning curves clearly favor the transperitoneal adrenalectomy.

Adrenal Cortex Neoplasms↗

PubMed2001

Trocar site recurrence in laparoscopic surgery for colorectal cancer.

BACKGROUND: Laparoscopic colorectal surgery has been associated with less postoperative pain, an early return of bowel function, a shorter period of hospitalization and disability, and better cosmetic results. However, the application of laparoscopic techniques to the curative resection of colorectal cancer is still controversial, owing to reports of cancer recurrence at the port site wounds. The accumulation of numerous such reports in a relatively short period raised concern that there might be an extraordinary high rate of port site metastases after laparoscopic colorectal surgery. This concern has led to intense clinical and basic research aimed at determining the incidence and causes of wound recurrence and developing preventative measures to address this problem. Despite these efforts, it is still not clear whether port site metastasis is really an inherent drawback to laparoscopic cancer surgery. METHODS: In this review of the literature on port site metastasis, we gathered data from clinical series of laparoscopic surgery for colorectal cancer. We eliminated series of <50 patients, since they may be flawed by the learning curve required for this technically demanding procedure. RESULTS: The rate of port site recurrences in the 1737 patients who participated in these series was 1%. Although the methods and criteria for patient selection in these studies varied, this figure appears to be comparable to the incidence reported for other malignancies and for laparotomies performed to treat colorectal cancer. CONCLUSION: This review suggests that wound recurrence may actually be the result of an unfortunate learning curve, rather than an inherent concern. However, we must await the final results of large randomized studies before drawing any definitive conclusions.

Adenocarcinoma↗

PubMed1996

[Retroperitoneoscopy. Technique and experiences with the first 100 patients].

Retroperitoneoscopic procedures were already being performed in the late 1970s. The clinical breakthrough of retroperitoneoscopy, however, was initiated in 1992 by the balloon-dissecting technique of Gaur, together with the experience gained with transperitoneal laparoscopic procedures in the upper retroperitoneum. We have modified the balloon-dissecting technique into a hydraulic video-optically controlled balloon dissection of the retroperitoneal space, and this procedure was recently further simplified. From December 1992 to December 1995 we performed 100 retroperitoneoscopic procedures in 98 patients (aged 4-82 years). Twenty-two patients had undergone previous abdominal surgery, 16 patients had been operated on for kidney and ureter problems. We performed 28 simple procedures (6 renal biopsies, 17 renal cyst resections, 4 ureterocutaneostomies, 1 foreign body retrieval), 65 difficult operations (47 nephrectomies, 5 nephroureterectomies, 5 nephropexies, 4 ureterolithotomies, 2x ureterolysis). There were also 9 complicated cases (5 heminephrectomies, 2 tumor nephrectomies, 2 dismembered pyeloplasties). Operating time, complications and conversion rate to open surgery mainly depended on the difficulty of the procedure and the personal learning curve, resulting in 50-90 min, 0% and 3.8%, respectively, for an easy retroperitoneoscopy, 90-210 min, 12% and 9.2% respectively for a difficult operation, and 180-390 min, 22% and 11%, respectively, for a very difficult procedure. Excluding the 17 patients with complications or conversion (unclear anatomy, extremely difficult dissection), the mean postoperative need for analgesics was 0.7 vials, and the mean hospital stay was 4.7 days. We have now passed most of our learning curve, and retroperitoneoscopy has become a standardized procedure that is a part of the training program for the experienced urologist.

Biopsy↗

PubMed1994

[Laparoscopic cholecystectomy: current status].

Since its introduction a few years ago, laparoscopic cholecystectomy has become today the standard treatment of gallbladder stones. Compared to open surgery it involves little change in the preoperative investigations. There has been, especially in the beginning of the learning curve, a demand for preoperative visualization of the bile duct anatomy and for exclusion of intraductal stones. Thus the incidence of preoperative ERCP has risen with the development of laparoscopic cholecystectomy. For the advanced laparoscopic surgeon, the indications for laparoscopic cholecystectomy are the same as for open surgery. The benefits of laparoscopy for the patient are obvious and the results are favourable. Bile duct injury is a very severe complication and, at the beginning of the learning curve, the incidence has been somewhat higher than in open surgery. Therefore, proper training in laparoscopic surgery and quality control are necessary. Many reports on advanced laparoscopic procedures have already been published, but only the future will show the limits of this technique.

Bile Ducts↗

PubMed2001

The Guildford MATTU TEP hernia model.

BACKGROUND: The totally extraperitoneal technique (TEP) is a well-established method for repairing inguinal hernias laparoscopically. It has a low recurrence rate with minimal morbidity. Good training is necessary to decrease the length of the learning curve. Laparoscopic training courses at the Guildford Minimal Access Therapy Training Unit (MATTU) include lectures, live demonstrations, and practical training. In the absence of a commercially available TEP hernia model, the Guildford MATTU, along with Limbs and Things, has developed a realistic artificial model. OBJECTIVE: The aim was to develop a model that would familiarize course participants with the different anatomical perspective and the steps needed to complete the TEP repair, in an effort to shorten their learning curve. EVALUATION: The MATTU model has been evaluated in terms of anatomic accuracy, realism, versatility, cost effectiveness, and ease of use. CONCLUSIONS: The MATTU model accurately replicates TEP repair. It is robust, easy to use, cost effective, and easy to maintain. It will be widely available.

Curriculum↗

PubMed1999

Technical complications of the Bernese periacetabular osteotomy.

Periacetabular osteotomy provides technical challenges in surgical exposure and reorientation of the acetabular fragment. There is evidence to indicate that the procedure is effective, but there is a recognized learning curve with respect to its performance. This analysis includes a retrospective review of the technical complications encountered in more than 500 cases. These problems were analyzed and then related to the stages of the procedure in which they occurred (surgical approach, osteotomy, fragment positioning, fragment fixation, and the postoperative period). Efforts are made to analyze the cause of the complications and to suggest preventative or remedial treatments. It is hoped that highlighting these complications will shorten the learning curve for surgeons trying this procedure for the first time.

Acetabulum↗

PubMed2004

First clinical experience with new transurethral bipolar prostate electrosurgery resection system: controlled tissue ablation (coblation technology).

BACKGROUND AND PURPOSE: Bipolar transurethral resection of the prostate (TURP) can allow transurethral debulking of the adenoma with a lower potential for complications from systemic absorption of hypotonic irrigant. We evaluated a new bipolar double-loop resection system with a dedicated controlled ablation (Coblation) generator in this context. PATIENTS AND METHODS: In our series of 36 patients, 32 underwent transurethral bipolar loop resection, of whom 12 had prostates >50 cc (range for entire series 30-126 cc) on transrectal ultrasonography. Ten men had indwelling catheters because of urinary retention. The four other patients underwent transurethral resection of bladder tumors. After an initial learning curve of eight TURPs, some minor technical modifications were made, both to the bipolar-loop resection technique and to the hardware. The modified Vista Coblation system was subsequently evaluated by 18 other urologists in 17 other centers throughout the U.S. RESULTS: The median resected dry weight was 22 g, and the median operating-room time was 48 minutes, giving a median resection rate of approximately 1 g every 2 minutes. Two of the eight men in our learning curve required treatment for delayed bleeding problems (clot obstruction of catheter), and one of these received a blood transfusion. Transfusion was not required subsequently regardless of prostate size, even in men with larger glands. One of the patients treated for bladder tumor had a minor perforation of the posterior bladder wall, which healed with conservative management. In the multicenter experience in the U.S., there were 59 evaluable patients. The median resected weight was 23 g, and the median resection time was 55 minutes. Two men required conversion to monopolar roller coagulation for intraoperative bleeding. Most patients (80%) were discharged from hospital within 24 hours. No adverse neuromuscular stimulation occurred. CONCLUSION: This first single-center and international multicenter experience with Coblation technology for bipolar double-loop saline TURP confirms the feasibility and safety of this procedure. Subjective evaluation showed the four most important perceived benefits of bipolar over monopolar TURP to be smoother cutting action, elimination of TUR syndrome, less tissue burning (and no smell), and reduced bleeding. The results of randomized studies with this technology are awaited, while its role in bladder tumor resection remains unclear.

Aged↗

PubMed2006

Impact of implant length and diameter on survival rates.

INTRODUCTION: Despite the high success rates of endosseous oral implants, restrictions have been advocated to their placement with regard to the bone available in height and volume. The use of short or nonstandard-diameter implants could be one way to overcome this limitation. MATERIAL AND METHODS: In order to explore the relationship between implant survival rates and their length and diameter, a Medline and a hand search was conducted covering the period 1990-2005. Papers were included which reported: (1) relevant data on implant length and diameter, (2) implant survival rates; either clearly indicated or calculable from data in the paper, (3) clearly defined criteria for implant failure, and in which (4) implants were placed in healed sites and (5) studies were in human subjects. RESULTS: A total of 53 human studies fulfilled the inclusion criteria. Concerning implant length, a relatively high number of published studies (12) indicated an increased failure rate with short implants which was associated with operators' learning curves, a routine surgical preparation (independent of the bone density), the use of machined-surfaced implants, and the placement in sites with poor bone density. Recent publications (22) reporting an adapted surgical preparation and the use of textured-surfaced implants have indicated survival rates of short implants comparable with those obtained with longer ones. Considering implant diameter, a few publications on wide-diameter implants have reported an increased failure rate, which was mainly associated with the operators' learning curves, poor bone density, implant design and site preparation, and the use of a wide implant when primary stability had not been achieved with a standard-diameter implant. More recent publications with an adapted surgical preparation, new implant designs and adequate indications have demonstrated that implant survival rate and diameter have no relationship. DISCUSSION: When surgical preparation is related to bone density, textured-surfaced implants are employed, operators' surgical skills are developed, and indications for implant treatment duly considered, the survival rates for short and for wide-diameter implants has been found to be comparable with those obtained with longer implants and those of a standard diameter. The use of a short or wide implant may be considered in sites thought unfavourable for implant success, such as those associated with bone resorption or previous injury and trauma. While in these situations implant failure rates may be increased, outcomes should be compared with those associated with advanced surgical procedure such as bone grafting, sinus lifting, and the transposition of the alveolar nerve.

Bone Density↗

PubMed2004

Laparoscopic virtual reality training: are 30 repetitions enough?

BACKGROUND: Current literature suggests that novices reach a plateau after two to seven trials when training on the MIST VR laparoscopic virtual reality system. We hypothesize that significant benefit may be gained through additional training. MATERIALS AND METHODS: Second-year medical students (n = 12) voluntarily enrolled under an IRB-approved protocol for MIST VR training. All subjects completed pre- and posttraining questionnaires and performed 30 repetitions of 12 tasks. Performance data were automatically recorded for each trial. Learning curves for each task were generated by fitting spline curves to the mean overall scores for each repetition. Scores were assessed for plateaus by repeated measures, slope, and best score. RESULTS: On average, subjects completed training in 7.1 h. (range, 5.9-9.2). Two to seven performance plateaus were identified for each of the 12 MIST VR tasks. Initial plateaus were found for all tasks by the 8th repetition; however, ultimate plateaus were not reached until 21-29 repetitions. Overall best score was reached between 20 and 30 repetitions and occurred beyond the ultimate plateau for 9 tasks. CONCLUSIONS: These data indicate that a lengthy learning curve exists for novices and may be seen throughout 30 repetitions and possibly beyond. Performance plateaus may not reliably determine training endpoints. We conclude that a significant and variable amount of training may be required to achieve maximal benefit. Neither a predetermined training duration nor an arbitrary number of repetitions may be adequate to ensure laparoscopic proficiency following simulator training. Standards which define performance-based endpoints should be established.

Adult↗

PubMed2005

Is there recanalization of the great saphenous vein 2 years after endovenous laser treatment?

PURPOSE: To report the 2-year single-center results of endovenous laser treatment (EVLT) for reflux in the great saphenous vein (GSV). METHODS: From January 2002 to January 2003, 85 symptomatic patients (56 women; mean age 49 years, range 27-80) underwent EVLT in 100 limbs. All patients were symptomatic, and the majority (67, 79%) had CEAP clinical class C2 venous disease. After treatment, they were monitored by clinical evaluation and duplex imaging. RESULTS: The initial treatment was completed in 93 limbs. Complications consisted of bruising (31%), tightness (17%), pain (14%), induration (2%), and superficial thrombophlebitis (2%). No severe complications were observed. Over a mean follow-up of 29 months (range 24-37), 3 patients died and 14 were lost to follow-up, leaving 88 (95%) and 76 (82%) limbs available for imaging surveillance at 1 and 2 years, respectively. At 3 months, treatment was anatomically successful in 84% of cases (78 complete occlusion, 7 partial occlusion, and 8 nonocclusion) and functionally successful in 89% (83 no reflux, 10 reflux). All technical failures and 73% (n=11) of the treatment failures occurred in the first half of the studied population, indicating a learning curve effect (p=0.015). Mean energy delivered per unit length was 39+/-8 J/cm (range 25-65) for successful treatment (n=78) and 30+/-10 J/cm (range 21-50) for failed treatment (n=15). No recanalization or recurrent GSV reflux after anatomically and functionally successful treatment was observed in 73 and 61 limbs at 1 and 2-year follow-up, respectively. CONCLUSIONS: EVLT is a feasible, safe, and fast procedure for eliminating GSV reflux and has excellent cosmetic results. Despite the learning curve, we believe that the treatment results are promising. When successful treatment is achieved by EVLT, a prospective follow-up of 2 years demonstrates durable results.

Adult↗

PubMed1998

[Experiences with "reversed tip and snip" phacoemulsification].

UNLABELLED: The endothelial cell count after phacoemulsification serves as a sensitive indicator for the level of corneal traumatization caused by different phacoemulsification techniques concerning the used phacotime and phacoenergy/s. PATIENTS: In a prospective and randomized study, the "reversed tip and snip" technique and the "divide and conquer" technique were performed in groups of 30 patients each. The corneal endothelial cell count was measured preoperatively as well as 4 weeks and 3 months postoperatively. In a second study the phacotime and phacoenergy used/second and the endothelial cell loss were compared between patients 1-30 and 31-60 who were operated on with the "reversed tip and snip" technique, demonstrating the learning curve of this technique. RESULTS: The endothelial cell count showed significant (P < 0.001) reduction by about 10% after the "reversed tip and snip" technique and by about 15% after the "divide and conquer" technique. The latter produced significantly greater cell loss. The phacotime (mean: 22-17) and phacoenergy/s (mean: 23-16) were reduced significantly (P < 0.05) when patients 1-30 were compared with 31-60. CONCLUSION: The "reversed tip and snip" phacoemulsification technique produces less endothelial cell loss than the "divide and conquer" technique. There is a short learning curve by using the "reversed tip and snip" technique.

Aged↗

PubMedDate not supplied

[Videolaparoscopic surgery in the treatment of colorectal disease: our experience with 200 patients].

In this article we examine our experience over the last 4 years, from 1998 to 2001, in the surgical treatment of colorectal disease using the laparoscopic approach. We treated 200 patients, 54 of whom presented benign disease and 146 malignancies. The operations were performed by a team of surgeons and nurses experienced in advanced laparoscopy. Over this period, the duration of the surgical intervention was gradually reduced by 17%. The conversion rate from laparoscopy to open procedures was also reduced (mean rate 11%). Canalization and the resumption of walking and nutrition were reasonably fast. Postoperative complications occurred in 22% of cases The number of fistulas and anastomotic dehiscences was high (10/200 = 5%), due both to evaluation errors and the choice of surgical material. At present, on applying the criteria of traditional open surgery, this figure is also coming down. Bleeding complications (12/200 = 6%) can also be ascribed to the learning curve (2 bleeds in the trocar site and 2 haematomas in the Pfannenstiel laparotomy site) and are therefore likely to be reduced. Bleeding during the surgical procedures, however, was very low, with a mean value of 69.6 ml. Laparoscopic surgery for colorectal disease is well standardized and we believe there should be no doubts as to its use in benign disease. Its use in oncological surgery, though theoretically correct, needs to be confirmed by the trials currently in progress. The results we have obtained in our experience, after completion of the learning curve, agree with the figures reported in the literature.

Adult↗

PubMedDate not supplied

Personal experience of laparoscopic cholecystectomy.

BACKGROUND/AIMS: We performed laparoscopic cholecystectomy with a surgical team consisting of the same operator and the same first assistant to evaluate a personal learning curve of laparoscopic cholecystectomy. METHODOLOGY: In the 135 patients who underwent the laparoscopic cholecystectomy, operative complications, postoperative complications and operative time were evaluated on the basis of using different camera assistants and the chronological advancement of the same operator and the same first assistant. RESULTS: The average operative time was 120 +/- 54 minutes. The operative time was statistically longer in the first ten cases. The major complication during operation, which was ligation of the common bile duct, occurred in the 7th case. The other operative complications, such as minor bile duct injury or mild bleeding, occurred occasionally in spite of experience or inexperience; the operative complications, however, tended to occur under the same camera assistant. On the other hand, the operative time was not related to the use of different camera assistants. CONCLUSIONS: From the personal learning curve of laparoscopic cholecystectomy, operative time is relatively longer in the early 10 cases. Complications tend to occur under the same camera assistant.

Cholecystectomy, Laparoscopic↗

PubMed2004

The advantages of hand-assisted laparoscopy.

The technical challenges of performing laparoscopic renal surgery require fellowship training and are associated with a steep learning curve. For the established urologist in practice, fellowship training is not a reality. As a result of these obstacles, in the late 1990s, laparoscopic renal surgery was entering the domain of the general surgeons who had a large number of laparoscopic procedures at their disposal to develop laparoscopic skills. Hand-assisted laparoscopic renal surgery is a hybrid procedure combining the most salient features of open renal surgery and laparoscopic renal surgery. By allowing the surgeons to place their non-dominant hand into the abdominal cavity, palpation and spatial orientation became possible, lessening the learning curve for laparoscopic surgery. Moreover, hand-assisted laparoscopic surgery could be applied to a variety of renal surgeries, extirpative and reconstructive, with results similar to those already achieved by standard laparoscopy. Throughout the past 5 years, hand-assisted laparoscopy has allowed urologists to incorporate laparoscopic renal surgery into their practices to the benefit of their patients and of their specialty. This review article offers a historical review of the development of hand-assisted laparoscopy and describes the procedures commonly performed today using this technique.

Cystectomy↗

PubMed2005

Role of biplane echocardiography in a large-volume clinical practice: revamping strategies for echocardiography in a limited time.

OBJECTIVES: We determined the feasibility, learning curve, time efficacy, and the quality of imaging during biplane echocardiography performed in clinical practice with a view to reduce a sonographer's time for image acquisition. BACKGROUND: Multidimensional echocardiographic imaging has improved the assessment of cardiac geometry and function in clinical settings. However, concerns regarding ease of performance and effects on overall clinical work flow remain inadequately addressed. METHODS: The study included 100 consecutive unselected patients referred to our echocardiography laboratory. They were randomized to conventional or biplane echocardiography performed by a sonographer without previous knowledge of biplane imaging. Image acquisition time and variables influencing the learning curve and overall image quality were analyzed. RESULTS: Mean time required for biplane and mono-plane imaging was not different in the first 24 cases. In the remaining cases, mean image acquisition time was reduced significantly in 58 cases (76.3%): biplane, 5.6 minutes (SD 1.3); and monoplane, 6.6 minutes (SD 1.6) ( P = .0003). For both techniques, scanning time was not affected by referral pattern, body habitus, or underlying cardiac lesion. Overall, biplane scanning resulted in reduction in echocardiographic imaging time of 9.1%, maintaining an acceptable image quality in 87% of patients. In the last 20 cases, new software design and superior instrumentation technique improved the mean time gain to 15%. CONCLUSION: In a high-volume echocardiography laboratory, biplane imaging effectively reduces sonographer time for imaging and improves throughput by increasing the number of comprehensive ultrasound studies that can be performed in a limited time.

Cardiovascular Diseases↗

PubMed1998

Laparoscopic adrenalectomy: the preferred choice? A comparison to open adrenalectomy.

PURPOSE: We compare the effectiveness and efficiency of laparoscopic adrenalectomy to open surgical management of adrenal disorders. MATERIALS AND METHODS: A retrospective comparison was undertaken of 21 patients who underwent transperitoneal laparoscopic adrenalectomy between April 1996 and May 1997 with 17 patients who underwent open adrenalectomy between October 1994 and January 1996. Any patient suspected of having primary adrenal carcinoma and/or an adrenal lesion larger than 6 cm. was excluded from the study. RESULTS: Patient demographics were matched well. Mean laparoscopic surgical time was 79 minutes longer than for open surgery. After overcoming the learning curve, the surgical time decreased by 59 minutes in the last 10 laparoscopic adrenalectomies. All laparoscopic intraoperative complications were managed without the need for open surgical conversion. Postoperative characteristics demonstrated significant benefits in the laparoscopic group (p=0.001) with respect to days to return to full diet (1.7 versus 4.6), analgesic pain requirements and days of hospitalization (2.7 versus 6.2). CONCLUSIONS: Laparoscopic adrenalectomy offers significant postoperative benefits to patients with benign adrenal disease requiring surgical intervention. The surgical time is longer than that for open adrenalectomy but there was an encouraging reduction in time after overcoming the laparoscopic learning curve. Laparoscopic adrenalectomy is an excellent choice for tumors smaller than 6 cm. Its role for larger lesions and/or primary adrenal carcinoma is currently under investigation.

Adrenal Gland Neoplasms↗