Accuracy of staging of oral squamous cell carcinoma of the tongue: should incisional biopsy be done before or after magnetic resonance imaging?

Abstract Accurate staging of oral squamous cell carcinoma (oral SCC) is essential. Some clinicians delay diagnostic biopsy until after magnetic resonance imaging (MRI). We retrospectively studied the clinical records and histopathological databases of 58 patients with SCC of the tongue; 39 had biopsy before MRI and 19 afterwards. In the group who had the biopsy first, eight were up-staged, nine were down-staged, and in 22 the T stage was accurate. In those who had MRI first, the corresponding figures were two, six, and 11, respectively. The time between initial biopsy and excision was significantly longer in the MRI group (43 days), than in the biopsy group (16 days) (p