My niece is in need of a kidney transplant. Because she was adopted, we always thought that we couldn't donate a kidney to her because of ABO blood type incompatibility. She's O- and the rest of the family is either A+ or A-.This evening, we found out that under certain situations, it doesn't matter about the ABO incompatibility; that a donor could be one blood type and the recipient could be another. We are definitely checking this out. Without a kidney transplant, we've been told that she'll be dead in about 3-4 months. My niece is getting a kidney!!!!!