T4N2c squamous cell carcinoma of the floor of the mouth and ventral tongue status post induction chemotherapy and radiotherapy. There is diffuse edema involving the soft tissues of the lower face/upper neck, including the larynx, which is likely treatment-related. The midline enhancing, infiltrative mass involving the floor of the mouth and the ventral aspect of the tongue has decreased in size, measuring approximately 20 x 25 mm in axial cross-section, previously 25 x 30 mm, and is more necrotic. The associated reference left level 1B pathologic lymph node is also not significantly changed in size, measuring 15 x 19 mm compared to 14 x 20 mm previously. The reference right level 3 lymph node measures 12 mm x 14 mm, previously also 12 mm x 14 mm. The submandibular glands, parotid glands, and thyroid are unchanged. The osseous structures are unchanged. There is a right internal jugular venous catheter.
The infiltrative tumor involving the floor of the mouth and the ventral tongue has decreased in size. However, the associated cervical lymphadenopathy has not significantly changed in size.