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Serum vitamin B12-binding proteins in a case of eosinophilic leukemia

✍ Scribed by Coltman, Charles A. ;Panettiere, Frank ;Carmel, Ralph


Publisher
John Wiley and Sons
Year
1975
Tongue
English
Weight
463 KB
Volume
1
Category
Article
ISSN
0098-1532

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✦ Synopsis


A patient with subacute eosinophilic leukemia is presented, with full recognition of the controversy surrounding that entity. Serum vitamin B12 and B12-binding protein studies and simultaneous complete blood counts were done before and during 6 months of high-dose, intermittent combination chemotherapy. The patient presented with extremely high levels of serum vitamin B12, unsaturated B12-binding capacity, and transcobalamin I, all of which resembled the highest values seen in chronic myelogenous leukemia. Serial studies, during and after remission induction, showed a precipitous fall of serum vitamin B12 and unsaturated B12-binding capacity to normal levels. The data show that transcobalamin I levels, which eventually reached low-normal range, correlate best with the level of circulating and bone marrow eosinophils. Transcobalamin II and serum third binder appeared to be normal throughout the patient's course. The B12-binding protein abnormalities are not considered diagnostic of eosinophilic leukemia.


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