11 April 2025
: Case report 
Exploring Protein A Immunoadsorption for Autoimmune Hemolytic Anemia with Hyper-IgG4emia
Unusual or unexpected effect of treatment
Jianwen Wang
12ACE, Yuxin Li12BE, Xinran Wang12EF, Xinyu Yang12BF, Yeyi Yang 12BD, Hao Zhang12AD*
DOI: 10.12659/AJCR.945746
Am J Case Rep 2025; 26:e945746
Figure 1. Bone marrow biopsy. (A) Bone marrow biopsy (Staining: HE 10×40). (B) Bone marrow biopsy (Staining Gomori 10×40). The bone marrow is actively proliferating, and the hematopoietic tissue is proliferating with granulocytes, especially erythrocytes. The ratio of granulocyte to red lineage is reduced, and granulocyte precursor cells are occasionally seen, and the cells of middle and late stages are scattered or in small piles. Lymphocytes and plasma cells were seen. Fibrosis was not seen.