The anatomy of the Fossa of Rosenmuller--its possible influence on the detection of occult nasopharyngeal carcinoma.

The Fossa of Rosenmuller (FOR) is a well established site of origin of nasopharyngeal carcinoma (NPC). Detection of early NPC requires a sound knowledge of the anatomy of the FOR. The authors study the anatomy of the FOR with the aid of CT Scan and discuss the possible influence of the anatomy of the FOR on the detection of occult NPC. This paper reveals that there are cases of postnasal space which cannot be fully inspected clinically due to the peculiar anatomy of the FOR.