除第一鳃裂衍化物外,鳃器残余均源自His窦始基的残留部分,以第二鳃裂囊肿最常见,常沿咽中缩肌上缘至胸锁乳突肌下1/3前缘间出现,如为窦道,则自外口起向外上方,穿过颈内、外动脉间,在舌咽和舌下神经浅面走行,终于同侧腭扁桃体窝下份,但罕见有累及鼻咽部者。报道一例29岁男性,因右扁桃体上窝延伸入鼻咽部咽侧间隙包块一周入院,有鼻音、吞咽痛及吞咽困难。曾有2次右扁桃体周围脓肿切开引流史,经静滴抗生素治愈,第2次发作后6周发现有咽侧肿块,由 In addition to the first branchialifferentiated derivative, the remnants of the gills are derived from the residual portion of the base of His sinusoid, the second branchial cleft cyst is the most common, often along the medial pharyngeal constrictor to the lower edge of the sternocleidomastoid muscle From the front edge, such as the sinus, then from the mouth to the outside from the top, through the internal and external arteries, in the glossopharyngeal and hypoglossal superficial travel, and finally ipsilateral palate tonsil fossa, but rare Involved in nasopharynx who. A 29-year-old man with a nasal, swallowing, and swallowing difficulties was reported for a 29-year-old man who had been admitted to the nasopharyngeal pharyngeal space for a single extension of the right tonsils. There have been 2 times around the right tonsil abscess incision and drainage history, cured by intravenous antibiotics, 6 weeks after the 2nd attack found pharyngeal mass, from