A 69-year-old woman with acute myeloid leukemia in preleukemic stage was reported. She was admitted to Kyorin University Hospital with complaints of general fatigue and purpura on limbs in July, 1978. On physical examination, frank anemia, purpura and hepatosplenomegaly were found. Hematological examination were showed: Hb 6.2g/d
l, RBC 177x10
4/cmm, Ht 16.5%, reticulocyte 1,3%, platelets 0.9x10
4/cmm, WBC 1200/cmm (seg, 10%, eosino, 1%, mono, 4%, lympho, 85%, erythroblast was shown.). Anisocytosis and poikilocytosis were shown on the blood smesr. The bone marrow characterized by maturation arrest of myeloid series and megaloblast-like cells were found. Serum vitamin B
12lebel was low (180pg/m
l). Serum folic acid lebel was normal range. Initial impression diagnosis was pernecious anemia or aplastic anemia. On the 7th hospital day, vitamin B
12therapy was started, but this therapy was not effective. A diagnosis of atypical aplastic anemia was made by clinical and cytological finding. On 28th hospital day, the oxymetholone therapy (90mg/day) was started. She was discharged in September 2, 1978. After the oxymetholone therapy, hematological finding was improved in November, 1978 (Hb 10.8g/d
l, Ht 33%, RBC 304x10
4/cmm, platelets 4,4x10
4/cmm, WBC 3,800/cmm). In Janualy 1979, pancytopenia again developed, which showed only inadequate response to the oxymetholone therapy. In March of the same year, she was readmitted to our hospital with complaints of general fatigue and nasal bleeding. On the peripheral blood examination, myeloblast-like leukemic cells were shown (22%). The bone marrow was hyperplastic and peroxidase-positive leukemic cells were increased (30.2%). A diagnosis of acute myeloid leukemia was made. Remission induction therapy was started with DNR, Ara-C, 6-MP and prednisolone. Subsequently, the patient took a rapid downhill course, and died of lung bleeding. Her whole illness had lasted approximately 8.5 month.
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