question: hi i m a future dentist in the third year - faculty of dentistry - egypt . one of my relatives (17 years old) suffering from tongue ulcer on the lateral aspect of the tongue, it was painful so i adviced her to use a mouth wash after brushing her teeth then i prescribed antibiotic ( flucloxacillin 500 mg ) + analgesic ( ibubrufen 400 mg ) a week ago . the ulcer is now enlarged & appears at the other side of the tongue & become painless ( onset : about amonth ago ) i suspect that it may be malignant ulcer & i want to know how to make a biopsy for this ulcer ? i need your help