This seven-year-old girl was referred to the Kanagawa Children's Medical Center on May 15 1982, because of pallor and low grade feve. Blood counts on admission were follows: Hb 4.2 g/d
l, WBC 2,900/mm
3 with 10% neutrophils, platelets 16,000/mm
3 and reticulocytes 0.1%. An aspirated bone marrow specimen revealed 12,000/mm
3 nucleated cells. Both CFU-C and BFU-E were 0/2×10
5 bone marrow cells. A diagnosis of severe aplastic anemia was made on the criteria of International Aplastic Anemia Study Group.
After coditioned with cyclophosphamide 50 mg/kg/day for four days, she recived 3.3×10
8/kg bone marrow nucleated cells from an HLA and ABO blood group identical sibling (ten-year-old boy). She was treated with intravenous methotrexate for preventing graft versus host disease (GVHD) after Thomas' method.
On the 12th day after transplantation, recovery of CFU-C was noted preceding the recovery of more mature hemopoietic bone marrow cells.
Cytomegalovirus infection was documented about 50 day after transplantation, but no symptoms appeared. This infection was most probably induced by the platelet transfusions.
A reverse ratio of OKT4 and OKT8 continued till 9 month after transplantation.
She is doing well without GVHD and remained in full hematological remission for 14 month.
Sofar, in Japan, 17 patients with severe aplastic anemia have received allogeneic bone marrow transplantations, and 7 of them, including this case, are alive.
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