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Hypoechoic nodule - Definition


Definition


Nodules are abnormal growths that accumulate on the surface of tissue or in an organ. They usually have a round shape. When found on organs, such as the thyroid or liver, these nodules are usually investigated using ultrasonography, a technology that works off the following principal: ultrasonic waves are emitted and partially or not reflected by the different structures they meet, thus generating an image on the screen. If a nodule reflects only a small number of waves, or none at all, it is said to be hypoechoic. Depending on which organ is being investigated, hypoechoic nodules can be reassuring or suspicious, which can in turn lead to further investigation such as samples taken from their position.
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