Hypertrophy of the parotid gland: computed tomographic findings.

Parotid gland hypertrophy, usually bilateral, is associated with a number of altered metabolic states. Occasionally unilateral hypertrophy occurs, suggesting parotid neoplasia. Because of increased lipid material within the hypertrophied gland, computed tomographic (CT) scanning may suggest the diagnosis, obviating surgery. Sialographic and CT appearances of parotid hypertrophy and the relationship between it and parotid lipoma are discussed.