Portal venous tumor casts causing defect on hepatic imaging.

Area of Science:

• Radiology
• Oncology
• Hepatology

Background:

• Portal defects on liver scans can be caused by a dilated portal vein.
• Accurate identification of portal defects is crucial for diagnosis and treatment planning.

Observation:

• This report details a case where tumor thrombus casts within the portal vein caused a defect.
• The tumor thrombus invaded the main branches of the portal vein, leading to the observed defect.

Findings:

• Tumor thrombus casts are identified as a novel cause of portal defects on liver imaging.
• This contrasts with previously reported causes such as a dilated portal vein.

Implications:

• This finding expands the differential diagnosis for portal defects observed in liver scans.
• Awareness of this etiology can improve diagnostic accuracy in patients with suspected or confirmed malignancies affecting the liver vasculature.