Hi, my son has blue nevis on his scalp. is this more likely to become malignant than a mole? he won't be able to monitor it on the top of his head.

Usually is benign: I am not sure how it was diagnosed but if it is truly a blue nevus it will usually remain benign or not change to cancer. There are 2 kinds generally with common or cellular types. The cellular type has a very small chance to become malignant but again is not bad. However the main objective is to watch it closely and see a doctor if changes. I hope this helped. Good luck.