my dermatologist said I should look these up.1-granuloma annulare. 2-necrobiosis unochica? I have leisons on both my lower legs, 1- I've had for 10 years and its 4in round and I also have 1 on t he back of the same leg,there is only 1/2 inch of normal skin between these. on my right leg I have 1 that started this year and it is the size of a silver dollar and seems to be growing rapidly! what is it and how do I get rid of it ?