Small and isoechoic
masses are usually undetectable; 3.
8 cm isoechoic
mass that was subsequently biopsied (Figure 1B).
5,11) Endoscopic ultrasound can show isoechoic
and hyperechoic parts, probably in part secondary to the stromal fibrosis induced by ulceration.
Sonography showed a heterogenous hypoechoic and isoechoic
mass with posterior acoustic enhancement (FIGURE 1C).
Hepatic vessels were seen as linear, and sometimes as tortuous tubular structures with thin walls that were isoechoic
and hyperechoic to the liver; these vessels also showed hypoechoic content with echogenic particles in a unidirectional flow, which were positive to Doppler.
A nodule is characterized as hypoechoic, isoechoic
, hyperechoic, or anechoic.
39,40) Imaging with ultrasound is not recommended because hybrid chromophobe-oncocytic tumours often appear isoechoic
to the renal parenchyma on ultrasound and may not be detected.
They concluded that sonographic findings of isoechoic
bladder wall thickening (focal, multifocal, or circumferential distribution), intact mucosa, and bullous lesions strongly suggested inflammation and not malignancy.
area within a thyroid nodule makes it look more benign than malignant.
The echo images on B-mode EUS were isoechoic
(n = 6) or hypoechoic (n = 141) (Table 2).
The lesions were cha- racterized as being isoechoic
hypoechoic or hyperechoic as compared to the liver parenchyma.
Table 2: Ultrasonographic Criteria of Benign and Neoplastic Lymphadenopathy Shape Border L/s Internal Ratio * Echogenicity Benign ovoid various High>2 Isoechoic
Disorders Neoplastic Round sharp ([dagger]) Low<2 Hypoechoic Disorders Hilum RI ** PI *** Blood Flow Distribution Benign Present- Low<0.