Non-hereditary foetal hyperechoic
kidneys can result from various causes such as an obstructive dysplasia, bilateral multicystic kidney disease, nephroblastomatosis, renal vein thrombosis, ischemia, infectious and metabolic diseases, nephrotic syndrome, and aneuploidy.
The bone presents as a hyperechoic
structure that produces an anechoic shadow; the main bone structure in the airway is the hyoid bone, but in over fifty percent of the patients it cannot be fully visualized.
Sonographic evidence of an intraluminal mass with a hyperechoic
arc-like surface and a marked acoustic shadow, suggestive of a bezoar, has been reported.
* a thick, hyperechoic
endometrial echo (decidualization)
Sonographic breast anatomy can be divided into 3 categories based on the echogenicity of tissues: hyperechoic
structures, medium echogenic structures and hypoechoic structures.[2,14]
Plain radiography did not give any appreciable diagnosis, but ultrasonography showed hyperechoic
area with distal cast acoustic shadow, but was also obscured by even a small volume of luminal gas.
Among these diseases, we are familiar with hepatic steatosis, which presents increased diffuse echogenicity (DIVERS & COOPER, 2000; NYLAND et al., 2005; DUTRA, 2007; REDROBE, 2010), the deposition of uric acid in the kidneys and heart, which can be visualized as hyperechoic
deposits (REDROBE, 2010), reproductive disorders, such as retention of eggs, which can be caused by cancer or granulomatous lesions in the reproductive system (FRYE, 1991), and the intake of foreign bodies, which may also occur in these animals and can be detected by ultrasound (PENNINCK, 2005).
Ultrasonography can show a solid, localized, noncompressible hyperechoic
mass suggestive of inflammed fat;[sup] CT of the abdomen can show a characteristic whirling fatty and fibrous mass near a vascular pedicle, a spiral fatty mass with a whirling pattern, or a circumscribed fatty mass with hyperattenuated streaks and a concentric distribution of fibrous folds.[sup], In this case, CT of the abdomen showed a whirling hyperattenuated streaks originating from the lesser omentum.
The rain artifact appears as a linear hyperechoic
artifact covering the field of view.
A regular, well defined, hyperechoic
lesion was usually benign.
The tibial nerve appears as a hyperechoic
structure adjacent to the posterior tibial artery (Fig.
The diagnosis of a benign teratoma (i.e., dermoid cyst) should be entertained if shadowing is present in a hyperechoic
nodule or mass.