Facial tumor like this is caused by a degeneration of the transcriptional factors within the molecular biological level. This degeneration has led to the over-expression of epidermal cells that grow unchecked and therefore the tumor manifests. In most cases these are benign, therefore it is plausible to be removed surgically, so long as it doesn't affect the prime internal visceria.
Ive seen a surgical removal of neoplasia in the O.R before, one of the major goals is to evade cutting too deep to remove the tumor in segments; else one could cut through a major vein and artery. The reconstructive surgeons and orthopedic surgeons who engage in this kind of specialty are truly gifted with the ability to guestimate where and how to cut. Impressive jud ni sila. The surgeon's hands are uber-sensitive and powerful in that way. Just right jud ilang pressure.