Chimerism in patients with AIHA
Twenty-six patients had chimerism checked between 1 month before AIHA diagnosis to 1 year after diagnosis. Most patients (16/26; 61.5%) had >95% total donor chimerism (full chimerism); 15.4% (4/26) had chimerism between 50-94% donor (high mixed chimerism); 11.5% (3/26) had 10-49% donor (low mixed chimerism); and 11.5% (3/26) had <10% donor (no donor). Many patients (25/44, 75.8%) had at least 1 peripheral blood chimerism observation within 30 days of their AIHA diagnosis. Using the observation closest to AIHA diagnosis, 64% (16/25) showed full chimerism, 24% (6/25) showed high mixed chimerism, 8% (2/25) showed low mixed chimerism, and 4% (1/25) showed no donor.