{"id":8590,"date":"2024-08-08T20:48:48","date_gmt":"2024-08-09T00:48:48","guid":{"rendered":"https:\/\/pockethealthqa.wpengine.com\/?p=8590"},"modified":"2025-10-20T09:25:25","modified_gmt":"2025-10-20T13:25:25","slug":"hypoechoic-mass","status":"publish","type":"post","link":"https:\/\/www.pockethealth.com\/patient-resources\/hypoechoic-mass\/","title":{"rendered":"Hypoechoic Mass in Thyroid, Breast, Liver and More: Learn What it Means"},"content":{"rendered":"

Over <\/span>50% of patients report having \u2018scanxiety<\/span><\/a>\u2019: they experience stress when waiting for the results of medical tests. One of the best ways to reduce that kind of stress is to understand more about the process.\u00a0<\/span><\/p>\n

The results of imaging tests contain complex medical terms. One of the terms you might find in your ultrasound results is <\/span>hypoechoic mass<\/b>.<\/span><\/p>\n

This article will explore what a hypoechoic mass is, what it means, what it looks like and how it\u2019s treated.<\/span><\/p>\n

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What does hypoechoic on an ultrasound mean?<\/h2>\n

Hypoechoic<\/b> means an area of tissue on an ultrasound scan that is darker than its surroundings. During an ultrasound scan, the sonographer moves a transducer, which produces high-frequency soundwaves, through conductive gel on the surface of the skin. The sound waves bounce back when they encounter internal structures and tissues, creating echoes which are compiled into live images.<\/span><\/p>\n

Ultrasound images<\/span><\/a> appear in shades of black, gray and white, depending on the density of the tissues they encounter. A hypoechoic mass does not send back many echoes, so it appears darker gray than the surrounding tissue.<\/span><\/p>\n

In and of itself, a hypoechoic mass is a nonspecific finding. It does not mean you have cancer, only that the ultrasound has distinguished a concentration of tissue denser than the rest of the immediate area.<\/span><\/p>\n

In medical terms, echogenic means the ability of internal tissue to reflect or send back an echo on an ultrasound. A tissue\u2019s echogenicity is described as hypoechoic, hyperechoic or anechoic. The chart below shows you the differences between these three terms.
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Hypochoic<\/strong><\/p><\/div><\/div><\/td>

Hyperechoic<\/strong><\/p><\/div><\/div><\/td>

Anechoic<\/strong><\/p><\/div><\/div><\/td><\/tr>

Does not produce many echoes<\/p><\/div><\/div><\/td>

Produces many echoes<\/p><\/div><\/div><\/td>

Produces no echoes at all<\/p><\/div><\/div><\/td><\/tr>

Absorbs more soundwaves<\/p><\/div><\/div><\/td>

Reflects more soundwaves<\/p><\/div><\/div><\/td>

Absorbs all soundwaves<\/p><\/div><\/div><\/td><\/tr>

Appears darker gray than surrounding tissue<\/p><\/div><\/div><\/td>

Appears lighter gray than surrounding tissue<\/p><\/div><\/div><\/td>

Appears black or much darker than surrounding tissue<\/p><\/div><\/div><\/td><\/tr>

Usually consists of dense, fibrous tissue<\/p><\/div><\/div><\/td>

May contain air- or fat- filled tissue<\/p><\/div><\/div><\/td>

Often contains fluid-filled tissue<\/p><\/div><\/div><\/td><\/tr>

Example:<\/strong> Areas of extra-dense breast tissue can look dark gray on an ultrasound <\/p><\/div><\/div><\/td>

Example:<\/strong> Lung tissue is filled with air, so it appears light gray on an ultrasound <\/p><\/div><\/div><\/td>

Example:<\/strong> A cyst, a fluid- filled sac, looks black on an ultrasound<\/p><\/div><\/div><\/td><\/tr><\/tbody><\/table><\/div><\/div>\n\n

Unsure of what certain medical terms mean in your report? PocketHealth’s Report Reader<\/a> provides clear definitions to help you understand your results, enabling more informed conversations with your healthcare provider.<\/p>\n

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Although visibly denser than the tissue around it, a hypoechoic mass does not necessarily indicate disease. An abnormal mass might be a tumor, but not all tumors are malignant (cancerous).<\/p>\n

Benign tumors are non-cancerous. Typically composed of the same type of tissue, they have defined borders and are fully contained in one organ. Cysts are masses filled with fluid and are rarely malignant. Potentially malignant tumors tend to have fuzzy, irregular borders, sometimes with branching shapes. Fast-growing, they may invade other organs, be composed of more than one type of tissue or contain calcifications.<\/p>\n

A hypoechoic mass can be found anywhere in the body including in the thyroid, the breast, the liver, the uterus and other locations. Here’s a look at some of the body parts where you may find a hypoechoic mass or nodule and what this might indicate.<\/p>\n

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Hypoechoic thyroid nodule<\/h2>\n

\"Ultrasound<\/p>\n

Ultrasound image of cyst in human thyroid gland<\/em><\/p>\n

Thyroid nodules are a common occurrence. Ultrasound scans can detect thyroid nodules in up to <\/span>67% of the population<\/span><\/a>, though the vast majority are unproblematic. More than 95% of thyroid nodules are benign and do not indicate thyroid cancer. In fact, half of thyroid nodules larger than 1 cm produce no symptoms at all.\u00a0<\/span><\/p>\n

If a thyroid nodule causes pain or pressure or interferes with your ability to swallow, treatment may be necessary. Benign hypoechoic thyroid nodules can be solid or fluid-filled, and caused by:<\/span><\/p>\n