A 43-year-old patient applied to a doctor complaining about painful deglutition, limited mouth opening. 3 days ago he felt pain in the decayed 37 tooth, on the next day there appeared limitations of mouth opening. Objectively: a slight soft swelling in the left submaxillary area. Palpation revealed an enlarged lymph node. Mouth can be opened up to 1,5 cm. There is also an edema of the left palatine arch and lateral pharynx wall. The 37 tooth is decayed, mucous membrane around the tooth is edematic, percussion is slightly painful. What is the most probable diagnosis?