Adenoid cystic carcinoma: a comparison between CT, MR and Gd MR imaging techniques.

Nasopharyngeal carcinoma continues to be a difficult diagnostic problem in many patients. It is well known that amongst the many and varied manifestations of this disease, a unilateral middle ear effusion in an adult should be regarded with suspicion. Such a case in a 42-year-old patient is presented. In this case the benefit of Gadolinium enhanced magnetic resonance imaging over and above computerized tomography is demonstrated.