How to safeguard yourself against malignant melanoma By Samuel Broder The term malignant melanoma and melanoma describe the most serious form of skin cancer, whose frequency is rising due to increasing sun exposures, especially when intermittent high-dose exposures (sunburns) come into play. Melanomas originate in melanocytes, which are specialized skin cells that make a protective brown pigment (melanin) to shield the skin against the harmful effects of the sun. Melanomas may arise in a mole …