This poster is published under an
open license. Please read the
disclaimer for further details.
Keywords:
Head and neck, Thyroid / Parathyroids, Ultrasound, Ultrasound-Colour Doppler, Ultrasound-Spectral Doppler, Treatment effects, Endocrine disorders
Authors:
T. A. R. R. dos Santos, T. Romero, R. C. L. Coêlho, S. M. Tochetto, M. C. Chammas; Sao Paulo/BR
DOI:
10.1594/ecr2015/C-2522
Results
A progressive reduction in the average volume of the thyroid gland was observed from pre to post treatment evaluations,
performed at 1,
3 and 6 months after radioiodo therapy (p < 0.05).
The mean pre-treatment thyroid volume was 34.8 cm3 and 1 month after treatment was 24.5 cm3,
showing a reduction of 29%.
After the third month of treatment,
the mean thyroid volume was 16.3 cm3,,
representing a decrease of 34% compared to 1 month post treatment evaluation.
After six months of tretment,
the mean thyroid volume was 11.1 cm3,
represening a decrease of 68% from pre-treatment.
All results were statistically significant ( p < 0.05).
Fig. 1
The parenchyma echogenicity was subjectively evaluated.
Before treatment,
the thyroid gland parenchyma was markdely hypoechogenic and diffusely heterogeneous.
During treatment there was an increase in the echogenicity of the parenchyma and a slight reduction its heterogeneity. Fig. 2
The vascularization of the parenchyma in color Doppler scan was diffusely increased pre-treatment and declined progressively,
but there was no returning to the usual standard of normality. Fig. 3
We also analyzed the peak systolic velocity (PSV ) in the lower thyroid arteries,
right and left.
The VPS inferior right thyroid artery had a mean pre-treatment of 80.69 cm/s and inferior left thyroid artery an average of 76.4 cm/s.
One month after treatment the mean was reduced to 57.5 cm/s at right and 61.19 at left,
respectively,
showing a reduction of 29 % and 20 %. Fig. 4 Fig. 5
After the third month,
the medium speeds decreased to 37.1 cm/s at right and 37.92 cm/s at left representing a reduction of 35% and 62%,
respectively in relation to prior exam (1 month after the treatment) .
In the sixth month after the treatment ,
the VPS avarage in thyroid right artery was 34.17 cm/s and at left 32.89 cm /s,
resulting in a sharpper decrease than in previous months with medium reductions of 8 % at right and 15 % at left ,
in relation to prior exam (3rd month after treatment) .
In conclusion,
the peak systolic velocities of thyroid arteries,
right and left,
showed decrease of 58%,
at sixth month when compared to pre treatment velocities.
All results were statistically significant ( p < 0.5).