[Clinical observation on laparoscopic radiofrequency ablation assisted enucleation for the renal epithelial angimyolipoma].
OBJECTIVE
To explore the clinicopathological characteristics of epithelial angiomyolipoma (EAML) and examine the clinical efficacy and prognosis of laparoscopic radio frequency ablation assisted enucleation.


METHODS
The clinicopathological data of 7 patients with renal EAML undergoing laparoscopic radio frequency ablation assisted enucleation were reviewed from April 2009 to June 2012. And the clinical efficacy and prognosis of laparoscopic radio frequency ablation assisted enucleation were analyzed.


RESULTS
Laparoscopic radio frequency ablation assisted enucleation was successfully performed in all cases without postoperative bleeding, ureteral obstruction, chronic renal insufficiency or urinary leakage. The mean operative duration was 110 min. Renal pedicles were blocked in 4 patients with a mean blockage time of 9 min. The mean intraoperative bleeding was 90 ml. No blood transfusion was required. The absolute bedrest time was 1-3 days and the drainage tube implanted for 3.8 days. Postoperative pathology showed that all cases were EAML. Immunohistochemistry showed HMB-45⁺ and small muscle action⁺ and creatine kinase⁻ in epithelioid cells. During a mean follow-up period of 1.8 years, none of them had local tumor recurrence, chronic renal insufficiency or other complications.


CONCLUSIONS
Renal EAML is a rare subtype of angiomyolipoma without specific clinical and imaging features. And its definite confirmation depends on pathology. Laparoscopic radio frequency ablation assisted enucleation is both safe and effective in the treatment of renal EAML with pseudocapsule.
Nanjing University Medical School,Nanjing 210093, China.
Yang
Y
Yang
Department of Urology, Nanjing Drum Tower Hospital, Affiliated Hospital, Nanjing University Medical School, Nanjing 210008, China.
Rong
R
Yang
Department of Urology, Nanjing Drum Tower Hospital, Affiliated Hospital, Nanjing University Medical School, Nanjing 210008, China. Email: dr.ghq@163.com.
Hongqian
H
Guo
D000368:Aged; D018207:Angiomyolipoma; D001803:Blood Transfusion; D017115:Catheter Ablation; D003402:Creatine Kinase; D006801:Humans; D007676:Kidney Failure, Chronic; D007680:Kidney Neoplasms; D010535:Laparoscopy; D053685:Laser Therapy; D019106:Postoperative Hemorrhage; D011379:Prognosis; D051436:Renal Insufficiency, Chronic; D014517:Ureteral Obstruction
D003402:Creatine Kinase