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Title: Effect of therapy on the neutropenia of hyperthyroidism

Journal Article · · South. Med. J.; (United States)

Observations in a patient with recurrent hyperthyroidism, each time associated with neutropenia which resolved after therapy, prompted a chart review of other patients referred for radioactive iodine therapy. Of 99 untreated patients, 18 had neutrophil counts of less than 2,000/cu mm. After therapy with either thionamides or /sup 131/I, 41 of 53 (77%) evaluable patients had an increase in neutrophil count. Eleven of these evaluable patients had neutropenia before therapy; after therapy, all 11 had an increase in their neutrophil counts into the normal range, with a mean increase of 170%. In one patient, studies on the mechanism of neutropenia indicate that bone marrow production and reserve remain normal and that circulating neutrophils are normally marginated. A decreased neutrophil circulation time may be the cause of neutropenia associated with hyperthyroidism.

Research Organization:
Division of Hematology-Oncology and Endocrinology, Department University of Texas Medical Branch, Galveston
OSTI ID:
5742753
Journal Information:
South. Med. J.; (United States), Vol. 76:3
Country of Publication:
United States
Language:
English