What is the relationship between cell cycle and cancer?

All cancer is related to the cell cycle. The cell cycle is the cycle of events and regulations that occur through the life of a cell. Part of the cell cycle is cell division. This process needs to be carefully regulated, because un-controlled cell division is called cancer. There are molecules within a cell that respond to signals and stimuli from the envoronment to decide is the cell is allowed to divide. These pathways relay mostly on cyclin and cyclin-dependent kinases. If the regulations fail in a cell - in this case, a skin cell - then you have a cencerous condition in the tissue - in this case, skin cancer.