I had a small lesion removed from top of hand 5 years ago by a local doctor by excision. Biopsy results indicated it basal cell carcinoma and suggested that it was not completely removed. It healed up nicely and has not reappeared after 5 years. I have not had any follow up visits to remove what was left of it (it must be under the skin).
Anyway, my question is does this remaining basal cell under the skin pose any health risks or can I just forget it unless it resurfaces the skin?