Patient hx anti-E, cold and warm Initial panel IS all negative; AHG 3+ across the board including auto. DAT = 3+ poly HOWEVER, one cell came up negative which is the R2R2 cell which does not make sense. Prior workup had almost the same result but 2+ and the R2R2 cell was called w+. Any advise on this? One thing that could be done is run other R2R2cells? But it still wont make sense as to why one comes up negative while there is a strong warm. Thanks.