Bilateral heterotopic salivary gland tissue (HSGT) in the lower neck

Heterotopic salivary gland tissue (HSGT) is a rare finding in the lower neck. Bilateral lesions are even more exceptional. It is generally accepted HSGT originates from defective embryogenesis within the branchial apparatus and are closely related to branchial cysts and sinuses. The true aetiology however is not fully understood. Here we report a rare case with bilateral lesions in the neck that drained a clear substance after drinking. Surgical resection of a 2 cm upwards fistula tracks was performed under general anaesthesia. Microscopic examination of resection peaces showed arguments for HSGT on both sides. Several aetiological theories are also discussed.