Changes in T-staging of nasopharyngeal carcinoma by CT-scan.

To evaluate the value of computerized axial tomogram (CT-scan) of the nasopharynx in the management of patients with nasopharyngeal carcinoma (NPC), comparisons between clinical T-staging by means of indirect or direct nasopharyngeal examination, and CT-scan were performed in 101 cases. CT-scan has upstaged clinical T-staging in 83.9 per cent of Tx-T3 cases, or 80 per cent in Tx, 98 per cent in T1, 65.4 per cent in T2, and 50 per cent in T3 cases. CT-scan was also able to show the destruction of the base of the skull in 85.7 per cent of T4 cases. With regard to tumor extensions into the surrounding regions, the CT-scan proved to out-perform clinical T-staging by 82.2, 57.4, and 25.7 per cent respectively in superior, anterior, and lateral and inferior extensions. We, therefore, recommend that a CT-scan be done in every new case of NPC, because it provides more accurate T-staging, and more details of tumor extension, which is essential in the management of NPC, especially in the proper planning of radical radiotherapy.