Hi Tim,
My intial dx was pre cancerous dysplasia too but it was removed the next week and pathology tests then found it actually was carcinoma- it either changed that quickly or was always cancer but biopsy didnt pick it up.
I wish you a speedy recovery

Monica,33 Mum of 3. Former smoker
SCC right lateral tongue. Intially thought to be cell dysplasia and dx as SCC after surgical excision.
Nov 2010- partial glossectomy (1cm in width), partial neck dissection. Margins clear, nothing found in nodes- YAY! Benign tumor on saliva gland.