1Departments of Surgery, Omiya Medical Center, Jichi Medical School, 2Departments of Internal Medicine, Omiya Medical Center, Jichi Medical School, 3Section of Ultrasound, Omiya Medical Center, Jichi Medical School
Color flow mapping, Diffuse goiter, Pulsed Doppler, Superior thyroid artery
In order to make precise differential diagnosis of diffuse goiter without nodular lesions (Graves' disease and chronic
thyroiditis), we used conventional and Doppler ultrasonography (Toshiba Model SSA-270 A, with a 7.5 MHz transducer) to
examine 173 patients with diffuse goiter. Images showing markedly increased intrathyroidal blood flow were obtained in 72% of cases of active Graves' disease. Peak velocity in the superior thyroid arteries of patients with active hyperthyroidism was
significantly greater than that in patients with hyperthyroidism in the euthyroid state and all cases of thyroiditis. We conclude
that, despite its simplicity, color Doppler ultrasonography is useful in the differential diagnosis of diffuse goiter. Using it in
combination with the measurement of velocity in the superior thyroid artery makes diagnosis even easier.