The mass was isodense
with muscle, and although it compressed adjacent structures, it was noninvasive and distinct from surrounding cervical and periparotid lymph nodes.
On CT scan the mass is usually isodense
to brain tissue.
The tumor may appear on plain CT scans as hypodense, isodense
or hyperdense lesions compared to the surrounding renal parenchyma.
Zinreich et al reported that MRI in six cases of Aspergillus mycetoma showed isodense
or decreased signal intensities on T1-weighted images, which were similar to the kinds of images that are seen in patients with bacterial sinusitis, polyps, and carcinomas.
Hemangiomas are ususally isodense
soft tissue attenuation masses enhancing homogenously and brilliantly on contrast administration helping in delineation of exact extent.
Metastatic disease should appear isodense
relative to the adjacent liver parenchyma on the water material-density images and demonstrate iodine uptake on the iodine material-density images (Figure 7).
polyp was clearly visible on CT, filling up the nasopharynx and extending downward to the oropharynx; no intracranial communication was noted.
In our study, 7 metastatic lesions were hypervascular (2 cases of metastasis from kidney, 1 case each of metastasis from thyroid, pancreas and breast and 2 cases of unknown primary) and were best visualized on arterial phase images rather than on portovenous phase, as they rapidly became isodense
to surrounding normal liver on portal venous phase and delayed scans.
On noncontrast CT imaging, the cysts can be hyperdense, isodense
, or hypodense.
Preoperative ultrasound showed heterogenous mass lesion arising from anterior abdominal wall taking minimal vascularity, computed tomography scan revealed a mass lesion isodense
to muscle noted arising from anterior abdominal wall originating from the rectus abdominis with loss of fat plane in preperitoneal layer possibly desmoid tumor.
CT findings generally reveal a low-density mass, although 2 cases reported isodense
(2) and hyperdense (3) lesions.
It reveals bony injury, hematoma (Appears hyperdense when compared to brain parenchyma), evidence of cerebral edema (Hypodense compared to normal brain parenchyma and isodense
compared to CSF) or mass effect (midline shift).