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Regenerative nodule (CEUS). One can see the hypovascular pattern of the solid nodule, with a size <10 mm. [citation needed] These lesions are well defined, with isoechoic or hypoechoic appearance and sizes less than 1 cm. They are high in numbers and have a more or less uniform distribution, involving all liver segments.
In contrast, tissues with lower echogenicity are called "hypoechoic" and are usually represented with darker colors. Areas that lack echogenicity are called "anechoic" and are usually displayed as completely dark. [1]
Suspicious findings in a nodule are hypoechoic, ill-defined margins, absence of peripheral halo or irregular margin, fine, punctate microcalcifications, presence of solid nodule, high levels of irregular blood flow within the nodule [11] or "taller-than-wide sign" (anterior-posterior diameter is greater than transverse diameter of a nodule).
Scrotal leiomyomas have been reported in patients from the fourth to ninth decades of life with most presenting during the fifth decade. These tumors are generally slow growth and asymptomatic. The sonographic features of leiomyomas have been reported as solid hypoechoic or heterogeneous masses that may or may not contain shadowing calcification.
Tumor characterization using the ultrasound method will be based on the following elements: consistency (solid, liquid, mixed), echogenicity, structure appearance (homogeneous or heterogeneous), delineation from adjacent liver parenchyma (capsular, imprecise), elasticity, posterior acoustic enhancement effect, the relation with neighboring ...
When imaging the liver with ultrasound, large lesions are likely to be HCC (e.g., a mass greater than 2 cm has more than 95% chance of being HCC).Given the blood flow to the liver, HCC would be most visible when the contrast flows through the arteries of the liver (also called the arterial phase) rather than when the contrast flows through the ...
T1 MRI of the same lipoma: High intensity signal mass with regions of ill-defined margins [23] Ultrasonography of a liposarcoma for comparison: In this case a heterogeneous mass consisting of an upper hyperechoic portion, corresponding to lipomatous matrix, and areas of hypoechogenicity corresponding to nonlipomatous components.
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. Specialty: Gynecology