Search results
Results from the WOW.Com Content Network
In terms of vascularity, metastases can be hypovascular (in gastric, colonic, pancreatic or ovarian adenocarcinomas) with hypoechoic pattern during arterial phase, and similar during portal venous and late phases, respectively hypervascular (neuroendocrine tumors, malignant melanoma, sarcomas, renal, breast or thyroid tumors) with hyperechoic ...
A poorly differentiated invasive left thyroid mass in a 58-year-old female patient. a Sagittal greyscale neck ultrasound shows a large hypoechoic lesion with macro-calcification and micro-calcification. b Sagittal colour Doppler ultrasound shows left internal jugular vein filling defect with detected internal vascularity suggestive of tumour ...
Leiomyoma arising from tunica albuginea. (a) Montage of 2 contiguous sonograms of a 67-year-old man shows a well-defined extratesticular mass with a whorl-shaped echotexture. (b) Color Doppler sonogram shows no internal vascularity. Note the presence of multiple shadows not associated with echogenic foci in the mass. [citation needed]
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).
On ultrasound, HCC often appears as a small hypoechoic lesion with poorly defined margins and coarse, irregular internal echoes. When the tumor grows, it can sometimes appear heterogeneous with fibrosis, fatty change, and calcifications. This heterogeneity can look similar to cirrhosis and the surrounding liver parenchyma.
Ultrasound imaging of ATC lesions reveals a hypoechoic mass (appears dark on ultrasound) with invasion of the local structures and may help to better characterize the presence or absence of neck lymph node metastases. [2] If surgery is planned, however, then a contrast-enhanced computed tomography (CT) scan of the neck must be performed. [2]
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
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]