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Echogenicity (sometimes as echogenecity) or echogeneity is the ability to bounce an echo, e.g. return the signal in medical ultrasound examinations. In other words, echogenicity is higher when the surface bouncing the sound echo reflects increased sound waves.
It is unique or paucilocular. It can be associated with other types of benign liver tumors. Characteristic 2D ultrasound appearance is that of a very well defined lesion, with sizes of 2–3 cm or less, showing increased echogenity and, when located in contact with the diaphragm, a "mirror image" phenomenon can be seen.
Rhabdomyosarcoma (a) Longitudinal section (composite image) of high resolution ultrasound of a 14-year-old boy shows a well defined hypoechoic extratesticular mass is found in the left scrotum, hydrocele is also present. (b) Color Doppler ultrasound shows that the mass is hypervascular. [citation needed]
A homogeneous hypoechoic mass presenting with the same appearance of lipoma. It was clinically distinguished by having rapid growth. ... In the center is a section of ...
Ultrasound showing dark (hypoechoic) area involving skin and subcutaneous tissue with moving internal debris in keeping with abscess [27] Ultrasound image showing an abscess, appearing as a mushroom-shaped dark (hypoechoic) area within the fibroglandular tissue of the breast
Transvaginal ultrasonography of a hematometra after childbirth, seen as a hypoechoic (darker) area within the uterine cavity. The cervix is located to the left in the image, and the fundus is located to the right.
Another imaging modality, which is ultrasound elastography, is also useful in diagnosing thyroid malignancy especially for follicular thyroid cancer. However, it is limited by the presence of adequate amount of normal tissue around the lesion, calcified shell around a nodule, cystic nodules, coalescent nodules.
Computed tomography is inferior to ultrasound for evaluating thyroid nodules. [14] Ultrasonographic markers of malignancy are: [15] solid hypoechoic appearance; irregular or blurred margins; intranodular vascular spots or pattern; microcalcifications
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