17. Androgen alopecia Baldness Genetics Caucasian m/c – almost 100% eventually In females, intact frontal hairline Starts 30-50yoa Rogaine-reduces rate of hair loss and may restore lost hair 20-40% recovery after 1 yr but Tx must continue life long and decr effectiveness w/ time

18. Freckle Hyperpigmented in sun-exposed areas – Incr amt of melanin but not an incr in # of melanocytes Appear before 3yoa and darken after UV exposure – People who sunburn easily, fair skin, reddish hair – 1-6mm irregular shape

19. Liver spots brown -caused by an INCR in # of melanocytes – multiple in sun-exposed middle aged 90% of people – No Tx necessary – no malig. Potential

20. ABCD for melanoma Asymmetry, border irregularity, color variegation, diameter >6mm. – Red, white, blue with notched border and has a papule or nodule w/in – 10% are missed w/ the ABCDs Incr rate of occurrence faster than any other cancer in US – Ages 15-50yoa m/c – 1:90 chance of developing melanoma – Cancer of melanocytes – Risk factors: sunlight, heredity, large # of nevi, large nevi