How does malignant melanoma spread?

Malignant melanoma may develop anywhere on the body.

It depends on the severity of the melanoma and how much sun exposure the person gets. Sometimes it can take months or even years to become severe.

When systemic disease or distant metastasis occur, melanoma commonly involves the lung, brain, liver, or occasionally bone. The malignancy causes death when its uncontrolled growth compromises vital...

Though it is difficult to prove that sunscreens statistically reduce the frequency of malignant melanoma at this time, most authorities recommend their use as protection from ultraviolet light.

It is highly unusual for malignant brain tumors to spread beyond the central nervous system