This paper presents two cases of renal allograft parapelvic cysts treated with ureteroscopy involving internal incision and drainage using a holmium laser.The procedure also involved cyst puncture and injection of methylthioninium chloride,with ultrasound monitoring to determine the incision location based on the flame sign.'The surgeries were uneventful,and follow-up ultrasounds conducted 2 to 3 months later revealed a reduction in cyst size.This technique introduces a novel approach for treating parapelvic cysts in renal allografts.
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