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(a) Coronal T1-weighted MRI shows an intermediate signal intensity mass with extensive involvement of the floor of the mouth. There is complete loss of the normal tissue planes. (b) Coronal contrast enhanced MRI shows heterogeneous enhancement in floor of mouth carcinoma. (c) Axial contrast enhanced MRI shows extensive floor of the mouth malignant infiltration. Note bilateral submandibular lymphadenopathy with central nodal necrosis (arrow).
