Laparoscopic nephrectomy of a horseshoe kidney

The role of laparoscopic surgery in the treatment of benign renal diseases continues to evolve with the development of equipment and refinement of techniques. A minimally invasive approach to the treatment of these lesions offers several advantages, including shorter convalescence. We describe the first laparoscopic nephrectomy involving a horseshoe kidney.

Laparoscopic pelvic lymph node dissection following definitive radiotherapy for carcinoma of the prostate

PURPOSE

Laparoscopic pelvic lymph node dissection is an effective and minimally invasive approach to the clinical staging of adenocarcinoma of the prostate. We report our experience with this technique in patients in whom full course pelvic radiotherapy had failed and who were being considered for salvage local therapy.

MATERIALS AND METHODS

In 14 patients disease was staged by transperitoneal laparoscopic pelvic lymph node dissection performed for persistent adenocarcinoma of the prostate at least 20 months (average 49.5) following external beam radiotherapy and/or brachytherapy. All patients were healthy, had no evidence of metastatic disease and were considered to be candidates for salvage therapy.

RESULTS

A total of 13 patients underwent successful laparoscopic pelvic lymph node dissection while 1 sustained an enterotomy requiring conversion to open surgery. The normal surgical planes were more difficult to dissect, with the obturator lymph node packets appearing smaller and more fibrotic than in nonirradiated patients, yielding an average of 7.1 total nodes. Average operative time was 167 minutes and postoperative hospitalization was comparable to reported series of nonirradiated patients. Four patients (28%) with metastatic pelvic lymph nodes underwent subsequent orchiectomy. Nine patients with negative lymph nodes underwent ultrasound guided transperineal placement of radioactive gold or palladium seeds. One patient underwent salvage radical retropubic prostatectomy.

CONCLUSIONS

Laparoscopic pelvic lymph node dissection following full course pelvic irradiation is technically feasible, albeit more difficult than in nonirradiated patients. This approach appears to be an excellent minimally invasive technique for the clinical restaging of persistent adenocarcinoma of the prostate in patients being considered for salvage therapy.

Carbon dioxide homeostasis during transperitoneal or extraperitoneal laparoscopic pelvic lymphadenectomy: a real-time intraoperative comparison

The primary goal of this study was to evaluate differences in carbon dioxide metabolism between patients undergoing transperitoneal or extraperitoneal laparoscopic pelvic lymph node dissection (L-PLND) for staging of adenocarcinoma of the prostate (CaP). Eighteen candidates undergoing L-PLND were divided between the transperitoneal (N = 12) and extraperitoneal (N = 6) approaches. End-tidal partial pressure of CO2 (PeCO2) and minute volume of expired CO2 (VCO2) were considered indicators of CO2 absorption. These two parameters were monitored intraoperatively utilizing a metabolic cart and Ohmeda Rascal-II. The cardiostimulatory effect of increasing serum CO2 and the ventilatory countermeasures used to correct the iatrogenic hypercapnia associated with CO2 insufflation were also measured. With the exception of the region of CO2 insufflation, the operative procedure and perioperative care were identical for the two groups. Preoperative patient characteristics were similar. The mean time of CO2 insufflation was 136 minutes for the transperitoneal group and 120 minutes for the extraperitoneal group. The absorption of CO2 was significantly greater and more rapid during extraperitoneal L-PLND. This may be attributable to more profound CO2 absorption from the parietal peritoneal surface compounded by subcutaneous CO2 emphysema. Disruption of microvascular and lymphatic channels during the development of the extraperitoneal working space facilitates direct CO2 absorption into the intravascular space. A minor increase in heart rate and systolic blood pressure was noted during CO2 insufflation. In all but one patient (extraperitoneal group), hypercarbia and acidemia were prevented by an increased ventilatory rate. The potential dysrhythmogenicity of hypercarbia may contraindicate the extraperitoneal approach in patients with cardiopulmonary disease.

Laparoscopically assisted penile revascularization for vasculogenic impotence

Young patients with impotence and cavernous arterial insufficiency resulting from trauma-induced arterial occlusive disease are ideal candidates for microvascular arterial bypass surgery. To avoid the long abdominal incision required to harvest the inferior epigastric artery, a laparoscopic approach was used. We report a case of laparoscopically assisted penile revascularization for vasculogenic impotence.

Laparoscopic partial nephrectomy: initial experience and comparison to the open surgical approach

During an 18-month period, 6 laparoscopic partial nephrectomies were attempted, 4 of which were successful. The surgical technique was modified and improved between cases aided by new laparoscopic instrumentation, such as the argon beam coagulator and the 7.5 MHz. ultrasonic sector scanning system. In a retrospective comparison between laparoscopic and open partial nephrectomy, estimated blood loss was 525 ml. for the former versus 708 ml. for the latter procedure. However, operating time was more than 2 hours longer with the laparoscopic approach. The major advantages of the laparoscopic procedure appear to be a more rapid return to full diet, less postoperative pain and less requirement for parenteral narcotics. Despite the small size of this series and limited followup data, convalescence may be shortened by 4 weeks after laparoscopic partial nephrectomy. Patients with benign diseases of the kidney, especially with a duplicated collecting system, who require partial nephrectomy may be considered candidates for the laparoscopic approach. The advantages to the patient, however, may be offset by the technical demands on the surgeon.

Conservative surgical therapy of localized renal cell carcinoma in von Hippel-Lindau disease

BACKGROUND

Renal cell carcinoma is a frequent cause of morbidity and mortality in patients with von Hippel-Lindau disease.

METHODS

A review was conducted of 10 patients with von Hippel-Lindau disease and localized renal tumors, who underwent renal parenchyma-sparing surgery. Four patients had recurrences, requiring a total of 16 operations. Patients were followed for recurrence by computed tomography.

RESULTS

The mean follow-up for these patients was 62 months (range, 11-118 months). Seventy-two tumors were resected, including 36 tumors not seen by preoperative imaging studies. This was accomplished primarily by enucleation or partial nephrectomy when anatomically feasible. No patient required dialysis, and the mean serum creatinine at follow-up was 1.2 mg/dl (range, 0.9-1.7). Of the 10 patients, 2 died, one of primary lung cancer with recurrent renal cell carcinoma found at autopsy, and one of metastatic renal cell carcinoma. Another patient with probable recurrent tumor was being observed at the time of this writing. The other seven patients were alive and without evidence of renal cancer.

CONCLUSION

Although the risk of recurrence is high, these patients may be treated with parenchyma-sparing renal surgery and enjoy a prolonged survival, and avoid the complications of dialysis or transplantation.