My father was diagnosed for tongue cancer in july and the doctor told us that it was a very agressive cancer as it progressed from stage two to 4 in just four days..... he had to undergo surgery in which they removed half his tongue and all the lymph nodes from the right side of the neck....this was followed with radiation therapy along with chemotherapy...it's been over a month now since he finished treatment but his speech is still very unclear and he is only able to take in liquids with a lot of difficulty.... Has anyone had similar experiences or knows how long it might take before he can speak clearly..... Also what are the possibilities of recurrence...