Another use of T1 in and out of phase imaging on #MRI - char | Figure 1

thexraydoctor

Radiology

Another use of T1 in and out of phase imaging on #MRI - characterising adrenal lesions as being lipid rich (I.e. Fatty) #Adenoma or not. The drop in signal intensity between the in and out of phase images indicates high fat content in this adrenal lesion, confirming it as a fatty adenoma.

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Axial T1-weighted postcontrast imaging in the hepatobiliary phase (image 1), T2-weighted imaging (image 2), T1-weighted imaging in the arterial phase (image 3), and axial contrast-enhanced CT (image 4) display a hepatoblastoma (arrow) in the left hepatic lobe. Multiple hepatobiliary phase hyperenhancing lesions (arrowhead) within the visible right liver are present. these lesions are not visible on other phases of imaging. This finding is characteristic of beta-catenin-activated hepatocellular adenomas in patients with familial adenomatous polyposis.

Adrenal Lipoma (P1)
Composed mainly of fat, it appears as a low-density area on non-contrast CT(below -30 HU), similar to fat tissue.
May contain small amounts of soft-tissue density, representing fibrous or other non-fat components.
no significant enhancement or only mild enhancement on contrast-enhanced scans.
Adrenal Adenoma (P2)
Shows a density of 10-30 HU on non-contrast CT, resembling soft tissue. Some lipid-rich adenomas may show lower densities but usually not below -30 HU.
Demonstrates noticeable enhancement in the arterial and venous phases, but the enhancement is less intense than adrenal cortical carcinoma.

Need help with the dx this is the pathology report from a young person who had a left adrenal tumor removed causing chronic and extensive virilization. We're trying to determine it the patient had adrenal cancer or an adrenal adenoma. Input would be welcome and appreciated.

hepatic adenoma on hepato specific contrast MRI (Gd EOB DTPA, Eovist in USA, Primovist in Europe and South America). Arterial enhancement and no excretion on hepatobilliary phase.

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