Adenoid cystic carcinoma of the sublingual gland--an unusual presentation.

A case of adenoid cystic carcinoma of the sublingual salivary gland presenting as recurrent submandibular salivary gland swelling is described. The obstructive symptoms were due to involvement of the ipsilateral submandibular duct by the tumour. A review of the literature suggests that this is the first such case to be reported. The importance of intra-oral examination when investigating swellings of the neck is emphasised.