Venkatraman G, Mattox D E
Division of Otolaryngology, Head & Neck Surgery, University of Maryland, Baltimore, USA.
Acta Otolaryngol. 1997 Mar;117(2):293-7. doi: 10.3109/00016489709117790.
Primary external auditory canal wall cholesteatomas are usually present in the inferior portion of the canal lateral to the tympanic membrane. Small inclusion cysts are a common finding along incision lines after ear surgery. This report details 5 cases of large canal wall cholesteatomas after prior ear surgery. The middle ear or mastoid was not directly involved in any of the cases. The largest of these presented 8 years after the initial procedure and eroded in the middle and temporal fossae. A common feature among these patients was an extended period in which the patient was lost to follow-up after surgery. This experience reinforces the need for vigilant long term follow up even in the asymptomatic postoperative patient.
原发性外耳道壁胆脂瘤通常位于鼓膜外侧外耳道的下部。小的包涵囊肿是耳部手术后沿切口线常见的发现。本报告详细介绍了5例既往耳部手术后出现的大型外耳道壁胆脂瘤病例。所有病例中耳或乳突均未直接受累。其中最大的一例在初次手术后8年出现，并侵蚀至中颅窝和颞窝。这些患者的一个共同特征是术后有很长一段时间失去随访。这一经验强化了即使是无症状的术后患者也需要进行长期密切随访的必要性。
