耳前瘘管为先天性畸形,是一种外显不全的常染色体显性遗传病,由于胚胎早期原始耳结节融合不全所致。常单独发生而不伴有其它外耳畸形,可一侧或双侧,管口多位于耳轮脚前,进入管口为一膨大的窦囊,可有分支,深浅长短不一,管腔内壁为复层鳞状上皮,具有毛囊、汗腺、皮脂腺等组织。因此,容易继发感染,间断流脓或形成脓肿,每需切开引流,反复发作或长期溃烂不愈,称之为感染性耳前 Ear fistula congenital malformations, is an underdosed an autosomal dominant genetic disease, due to embryonic primitive ear nodules due to incomplete fusion. Often occur alone without other external ear deformities can be on one or both sides, the nozzle located at the front of the helix foot, enter the nozzle is an enlarged sinus sac, may have branches, the depth of different lengths, lumen wall complex Layer squamous epithelium, with hair follicles, sweat glands, sebaceous glands and other organizations. Therefore, easy to secondary infection, intermittent pus or the formation of abscess, each need to incision and drainage, recurrent or long-term ulcer healing, known as infectious ear