Collision tumour in the oral cavity (a report of 2 cases).
D000368:Aged; D002294:Carcinoma, Squamous Cell / Q000150:complications*; D005260:Female; D006801:Humans; D008297:Male; D008545:Melanoma / Q000150:complications*; D008875:Middle Aged; D009062:Mouth Neoplasms / Q000473:pathology*; D009378:Neoplasms, Multiple Primary