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Introduction of preauricular fistula
Preauricular fistula is a common congenital malformation. Patients generally only feel local itching, and sometimes gently squeeze out a little white secretion around the small eyes. Fistula is mostly located in front of the foot of helix, and a few can be located in the triangular fossa of auricle or concha cavity. Congenital preauricular fistula can be divided into simple type, infectious type and secretory type. Generally asymptomatic. When pressed, a little thin mucus or milky white sebum may overflow from the fistula, causing local itching and discomfort. Asymptomatic or non-infected people may not be treated. Local itching and secretion overflow should be surgically removed.