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  • Title: Retroperitoneoscopy-assisted cryoablation of renal tumors using multiple 1.5 mm ultrathin cryoprobes: a preliminary report.
    Author: Bachmann A, Sulser T, Jayet C, Wyler S, Ruszat R, Reich O, Gasser TC, Siebels M, Stief CG, Casella R.
    Journal: Eur Urol; 2005 Apr; 47(4):474-9. PubMed ID: 15774244.
    Abstract:
    OBJECTIVES: Laparoscopic cryoablation has recently been proposed as a minimally invasive nephron-sparing treatment for selected patients. We report on our experience with a retroperitoneoscopic technique using multiple ultrathin cryoprobes. METHODS: Seven patients underwent retroperitoneoscopic renal cryoablation for solid renal masses. Mean tumor size on the CT scan was 2.6 (1.5-3.5) cm. A double freeze-thaw cycle of renal cryoablation was performed under real-time ultrasound monitoring using a total of six 1.5-mm cryoprobes simultaneously. RESULTS: Cryoablation was technically successful in all patients without any need for conversion. Mean duration of surgery was 161 (130-195) minutes and mean blood loss was 107 (50-250) ml. Perioperative biopsy of the tumor confirmed renal cell carcinoma in four patients and angiomyolipoma in two patients; it was inconclusive in one case. Mean follow-up for 13.6 (4-22) months showed no evidence of residual tumor or recurrence. CONCLUSIONS: Retroperitoneoscopy-assisted cryosurgical ablation using multiple ultrathin 1.5-mm cryoprobes is a minimally invasive treatment that is suitable to treat small renal tumors.
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