Aronsohn R S, Batsakis J G, Rice D H, Work W P
Department of Pathology, University of Michigan, Ann Arbor.
Arch Otolaryngol. 1976 Dec;102(12):737-40. doi: 10.1001/archotol.1976.00780170055008.
Eleven cases of first branchial cleft duplication anomalies are classified into types I and II. Type I defects are associated with the first cleft and are duplication anomalies of the membranous external auditory canal. Type II defects are associated with the first cleft and first and second arches, and, as such, are associated with defects of the membranous external auditory canal and cartilaginous elements. Microscopical examination of tissue in type I anomalies shows a cyst lined by skin without adnexal structures and without cartilage. Type II anomalies usually contain all elements. Misdiagnosis, infection, and recurrences are common with these lesions. Clinically, they may drain through the neck and external auditory canal. Surgical excision must be complete or there will be recurrence. The facial nerve must be identified and protected during the excision.
11例第一鳃裂重复畸形被分为I型和II型。I型缺陷与第一鳃裂相关，是膜性外耳道的重复畸形。II型缺陷与第一鳃裂以及第一和第二鳃弓相关，因此与膜性外耳道和软骨成分的缺陷有关。I型畸形组织的显微镜检查显示囊肿内衬皮肤，无附属结构且无软骨。II型畸形通常包含所有成分。这些病变常出现误诊、感染和复发。临床上，它们可能通过颈部和外耳道引流。手术切除必须彻底，否则会复发。切除过程中必须识别并保护面神经。
