Hj. Steinkamp et al., MRI AND CT IN STAGING OF CARCINOMAS OF TH E ORAL CAVITY AND OROPHARYNX, HNO. Hals-, Nasen-, Ohrenarzte, 41(11), 1993, pp. 519-525
30 patients with malignant tumours of the cavum oris and oropharynx we
re examined by MRI and CT to compare their accuracy for T-staging. The
re was histological information in all cases. Histological studies sho
wed an accuracy in T-staging of 81% for MRI and 77% for CT, Differenti
ation between stages T2/T3 and T3/T4 is possible in 80% by CT and 84%
by MRI. Tumours of the cavum oris and oropharynx of T1-stage are possi
ble only in 1 of 3 cases. The use of T2-weighted sequences allows the
best frequence of tumour representation in 89%. CT shows an earlier bo
ne involvement than MRI. In addition, the ability to produce coronal a
nd sagittal images by MRI makes it superior to CT in judging tumour ex
tension.