The purpose of this study is to investigate the use intraoral ultrasound for measuring depth of invasion (DOI) in oral tongue squamous cell carcinoma. The DOI's measured on ultrasound and measurements from MRI scans, will be compared to the measurements made from pathological examination of removed specimens.
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Correlation of DOI measured on ultrasound and on MRI compared to pathological examination
Timeframe: when pathological examination is made, within 4 weeks of US and MRi