Cancer After Superficial Mole Removal?

Incompletely excised or lasered moles can grow back looking atypical. The key is to have the original specimen biopsy and if the pathology indicated benign nature of the lesion, then subsequent residual mole can be monitored.

Moles are not supposed to be removed by laser.  Lasers were designed for pigmented patches or sun damage.  The general consensus is that a mole needs to be removed surgically and sent to the laboratory for analysis.  I understand why you are concerned about the mole and what is left.  I recommend seeing an experienced board certified dermatologist who understands both cosmetic and medical dermatology.

You are not at any greater risk for cancer having had the mole removed by laser.  If you do happen to develop cancer in the residual mole (most moles never become cancerous) you will notice some change to the area.  The scar will not hide the cancer and will not cause the cancer to spread under the skin.  However, keep in mind that moles can return, and any evidence of recurrence does not mean it is cancerous.  If that were to happen, have a dermatologist examine the area and possibly test it with a biopsy.