Radiologically occult nasopharyngeal carcinoma: the importance of clinical suspicion and repeat biopsy.
A man in his 40s undergoing long-term otolaryngology surveillance following an initial diagnosis of a left-sided nasopharyngeal lesion classified as carcinoma in situ re-presented approximately 3 years later with intermittent aural fullness and tinnitus. Flexible nasendoscopy demonstrated subtle unilateral polypoidal c...