What will happen if cancerous mole goes untreated?

Spreads: The rule for all tumors is that if you leave them alone they will grow on you. Melanoma or a malignant mole can rapidly spread to lymph nodes and then disseminate to every known organ in the body. It can produce satellites adjacent to the primary, ulcerate and bleed. In rare instances spontaneous regression is seen probably because of shedding of tumor protein into the skin inducing immunity.