未经证实：经肛门内镜手术为先天性胆脂瘤（CC）提供了优势，后者是位于完整鼓膜上的扩大的囊性肿块。
UNASSIGNED：确定经耳道内窥镜手术治疗CC的疗效。
UNASSIGNED：11例局限在中耳的CC患者由耳镜手术熟练的外科医生进行了经耳道内窥镜耳手术。根据Potsic分类,四,三,4例患者的病变分别为1期,2期和3期.平均随访时间为24.5个月。我们回顾性分析复发率，并发症,和CC患者的平均听力阈值。
UNASSIGNED：所有CC均通过经管内窥镜入路成功切除，没有任何直接或严重的并发症。唯一的并发症是由于术后疤痕导致的外耳道狭窄，发生在3期胆脂瘤患者中，该患者复发，需要再次手术和第二阶段听骨链重建。另外两名患者接受了一期听骨链重建。所有三名患者都接受了全人工听骨置换假体，其中两个也接受了软骨移植。
UNASSIGNED：经肛门内窥镜耳部手术是治疗属于Potsic3期或以下阶段的CC的有效方法。
UNASSIGNED: Transcanal endoscopic surgery offers advantages for congenital cholesteatoma (CC) which is expanding cystic mass located on an intact tympanic membrane.
UNASSIGNED: To determine the efficacy of transcanal endoscopic ear surgery for the treatment of CC.
UNASSIGNED: Eleven patients with CC confined to the middle ear underwent transcanal endoscopic ear surgery by surgeons who were skilled in otoscopic surgery. According to the Potsic classification, four, three, and four patients had lesions in stages 1, 2, and 3, respectively. The mean follow-up duration was 24.5 months. We retrospectively analyzed the recurrence rate, complications, and average hearing thresholds of the patients with CC.
UNASSIGNED: All CCs were successfully resected via the transcanal endoscopic approach, without any immediate or serious complications. The only complication was external auditory canal stenosis due to postoperative scarring, which occurred in a patient with a stage-3 cholesteatoma that recurred and required reoperation and second-stage ossicular chain reconstruction. Two more patients underwent one-stage ossicular chain reconstruction. All three patients received a total artificial ossicular replacement prosthesis, and two of them also received cartilage grafts.
UNASSIGNED: Transcanal endoscopic ear surgery is an effective method to treat CC belonging to Potsic stages 3 or below.
