Please provide an image. Cancer in the mouth statistically are low compared to benign lesions. "When you hear hoof beats, think horses not zebras." Zebras would be more like cancer and horses are more common and benign. White spots in the jaws are usually not as scary as black spots. White spots depict denser mineral aggregates where black spots are typically hollow, infection, loss of bone material. My differential guesses (without an image) are odontoma, saliva duct stone, retained root from baby tooth, sclerotic bone, normal bone trabeculae, or restoration debris. Do you use tobacco, drink heavily, or have family history? The only way to know if it is cancer is to remove it (biopsy) and check it under a microscope. Removing it can be traumatic so only the high risk lesions should be considered.
