T4aN2cMx cancer of the oral cavity. There is an infiltrative oral tongue mass that spans the midline and measures up to approximately 5 cm. The tumor extends along the anterior floor of mouth and gingiva, with invasion of the mandible. The tumor does not invade the masticator space, pterygoid plates, or skull base. There is no evidence of internal carotid artery encasement. There are multiple abnormal suprahyoid lymph nodes bilaterally. For example, a right level 1 lymph node measures 29 x 49 mm in axial cross-section and a left level1 lymph node measures 11 x 20 mm in axial cross-section. The right submandibular gland is compressed and perhaps even invaded by the adjacent lymphadenopathy. The other salivary glands are intact. The thyroid gland is unremarkable. There is multilevel degenerative cervical spondylosis. The imaged intracranial structures are unremarkable.
1. The oral cavity squamous cell carcinoma measures up to 5 cm and involves the oral tongue, the anterior floor of mouth, and gingiva, with invasion of the mandible. 2. Multiple bilateral suprahyoid lymph nodes are compatible with metastases.