I have a a canker sore like formation on the inside of my cheek, however instead of forming a depression, its actually protruding. is this cancer?

Have it evaluated: You would need to be personally examined to determine the diagnosis of your lesion and what treatment, if any, is indicated. See your local dentist asap.

Canker Sores: are the most common oral lesions. Individual ulcers that may protrude, typically last 1-2 weeks. The condition is usually self-limiting. Try to keep adequate oral hygiene as possible. If concerned, see your dentist.

Signs, symptoms: See oral surgeon or ENT doc if you have any of these symptoms: Persistent mouth sore, persistent mouth pain, a lump or thickening in the cheek, a white/red patch on the gums, tongue, tonsil, or lining of the mouth, a sore throat, hoarseness or feeling that something is caught in the throat that does not go away, difficulty swallowing/chewing.

Previous answers: Each of the previous excellent answers are saying the same thing. They are saying that the lesion you describe is probably not cancer, but to make sure you need to be physically examined. See your Dentist. If you don't have one, ask friends/family/coworkers for recommendations. If lesion even the least bit suspicious Dentist will refer you to appropriate specialist. Go find out.