Infiltrative Bcc on my Ear?

Infiltrative basal cell carcinomas can have small roots that can go much deeper than can be seen with the eye.  Curettage frequently cannot treat these roots because the normal collagen surrounding them blocks the curette from being effective.  Mohs surgery is the surgical equivalent to taking the bad spot out of an apple.  The cancer containing skin is removed and then the edges are evaluated to see if any cancer remains (like looking at the underside of the piece of apple that was removed to see if there is any brown at the edges).  If cancer is still at the edge, the surgeon goes back to the exact spot where the cancer still is and takes more until it is gone.  You can find an experienced Mohs surgeon through the Mohs College or the American Society for Mohs Surgery. 

should probably be further managed unless you equate curettage to an actual excision where the cartilage was removed completely and the edges cut with a blade instead of scraping (which is what curettage is).  You can consider Mohs or frozen sections to help ensure margins are clear and if the defect is small enough, a menu of options for closing it or allowing it to heal is available.  You have a BCC, the most benign of skin cancers so if you were my patient, if there was no obvious evidence of persistence, you could choose to observe it closely as recurrences will be local.  You could consider radiation therapy but we tend to avoid it if at all possible due to long term changes from radiation.  If you had a true excision and margins are microscopic at best, risks of a recurrence are less that 50%.  You would have to decide if it was worth pursuing further.