@kneenee: It sounds like you're taking the necessary and proactive steps. From what I understand, the two conditions are very difficult to differentiate and while neither tends to metastasize it's important to clearly identify as treatment - such as excision to prevent recurrence - depends on the pathology which imaging such as MRI may assist.

You'll undoubtedly have a lot of appointments coming up but if you could keep me posted on the final results, I'd appreciate it. Many people check on Connect and your experience could help others. Best of luck to you!