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Red cell changes in hyperthyroidism.

J How, R J Davidson, P D Bewsher

Scandinavian Journal of Haematology

|October 1, 1979

Summary

This summary is machine-generated.

Hyperthyroidism is linked to a lower mean corpuscular volume (MCV) in red blood cells. This red cell measure normalizes after effective treatment, suggesting MCV may aid in diagnosing hyperthyroidism.

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Area of Science:

Endocrinology
Hematology

Background:

Hyperthyroidism can affect various physiological systems, including hematological parameters.
Red blood cell indices may be altered in patients with thyroid dysfunction.

Purpose of the Study:

To investigate the red cell profile in hyperthyroid patients using the Coulter 'S' analyzer.
To evaluate changes in red cell parameters during anti-thyroid treatment.

Main Methods:

Prospective study of 100 untreated hyperthyroid patients.
Serial hematological data collected during treatment with radio-iodine, carbimazole, or beta-blockers.

Main Results:

A consistently low mean corpuscular volume (MCV) was observed in hyperthyroid patients.

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Beta-blocker treatment did not significantly alter red cell parameters.

MCV normalized 6-8 weeks after achieving euthyroid state with radio-iodine or carbimazole.

Hemoglobin levels increased significantly after effective anti-thyroid treatment.

Conclusions:

Low MCV is a significant finding in hyperthyroidism.
MCV normalization occurs post-treatment, with a notable lag period.
Measurement of MCV may assist in hyperthyroid diagnosis.