抄録
First branchial cleft anomalies were diagnosed in 4 patients between 2000 and 2004; 3 cases were cysts and 1 case was a fistula. It is difficult to diagnose first branchial cysts before operation. An operation is often performed as for a parotid tumor, especially Warthin tumor located in the inferior pole. Although first branchial cleft anomalies account for less than 10% of all branchial abnormalities, some cases may be misdiagnosed as parotid gland tumor. On the other hand, first branchial fistula was easy to diagnose because it was open to the external auditory canal and/or infra-auricular skin. However, since first branchial fistula are often close to facial nerves, it is necessary to perform the surgery carefully.
