I had sun spots (pre cancerous)on the front of my then bald head zapped by my dermatologist with liquid nitrogen about 2 months before my hair transplant. I'm now 4 months post op and I'm noticing that there is no hair growth on these spots. Anyone ever have this happen? I'm hoping it might eventually fill in or the surrounding hair might be enough to cover it or worst case, try again if it looks bad in a year.