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Keywords:
Metastases, Image verification, Cancer, Statistics, Screening, Diagnostic procedure, Ultrasound-Colour Doppler, Ultrasound, Thyroid / Parathyroids, Lymph nodes, Head and neck
Authors:
M. R. M. Machado, M. C. Chammas, M. R. Tavares, G. G. Cerri; São Paulo/BR
DOI:
10.1594/ecr2015/C-1477
Methods and materials
A prospective study was conducted and we investigated 94 patients of postoperative thyroid cancer,
determining ultrasonography characteristics of malignant lymph nodes,
from February 2012 to September 2013 in the University State of São Paulo (USP).
Institutional review board approval was obtained for this study.
Ultrasound was held at E9 equipment - GE or Phillips iU22,
equipped with a multifrequency linear probe 7-12 MHz,
with the use of trapezoidal image.
Ultrasonography of neck lymph nodes research of each of the patients included in this study was performed in the following sequence: U.S B-mode and US Doppler amplitude.
The performance of the test was standardized as follows: patient supine with a roll under the shoulders and neck in hyperextension of approximately 45o.
The devices were pre-adjusted for thyroid ultrasound.
The transducer unit was lightly resting on the skin without pressuring her to not interfere in the evaluation of the vascularity of the parenchyma due to compression of the vessels.
The images were documented by digital means and recorded on compact disk (CD) or memory storage device in USB flash drive format Joint Photographic Experts Group (.Jpeg) JPEG.
The number of lymph nodes present,
node size and malignancy status were recorded by ultrasound in 94 patients post operative thyroid cancer.
We had 80 of these lymph nodes showed some characteristic among microcalcifications,
hemorrhagic necrosis and Doppler ultrasound peripheral and irregular vascularization.
From these 80 patients with suspicious lymph nodes we had 22 patients with histologic confirmed recurrence.
We analyzed the association between suspicious lymph nodes ultrasonographic characteristics and the confirmation of presence of malignancy.
Our study focused on determining sensitivity and specificity of the presence of microcalcifications,
peripheral vascularity and cystic necrosis in cervical lymph nodes to detect cervical lymph nodes recurrence.