R R

What Is Portal Vein Embolization?

Portal vein embolization is an image-guided procedure that intentionally blocks portal vein branches supplying the portion of liver planned for surgical removal. Redirecting portal blood flow toward the future liver remnant stimulates the unembolized liver to enlarge. This growth can increase the amount of functioning liver that will remain after a major hepatectomy. The procedure is performed by an interventional radiologist through a percutaneous venous access route.

Link to This Resource Page

Provide a valuable resource to your clients or customers by linking to this resource page. Just place the following link on your website.

To display this...

What Is Portal Vein Embolization?

Portal vein embolization is an image-guided procedure that intentionally blocks portal vein branches supplying the portion of liver planned for surgical removal. Redirecting portal blood flow toward the future liver remnant stimulates the unembolized liver to enlarge. This growth can increase the amount of functioning liver that will remain after a major hepatectomy. The procedure is performed by an interventional radiologist through a percutaneous venous access route.

read more about portal vein embolization ...

Copy this HTML:

Copy HTML Copied!

Why Is Portal Vein Embolization Performed?

The procedure is used before major liver resection when the predicted future liver remnant is considered too small for safe surgery. It can be used for patients with primary liver tumors, bile duct cancers, colorectal liver metastases, and selected other diseases requiring extensive hepatectomy. Increasing the future liver remnant can reduce the risk of postoperative liver insufficiency in appropriately selected patients. Liver volume, liver function, underlying fibrosis or cirrhosis, prior chemotherapy, and the planned extent of resection influence the decision to perform embolization.

How Is Portal Vein Embolization Performed?

Using ultrasound and fluoroscopic guidance, an interventional radiologist places a needle and catheter into the portal venous system through the liver. The catheter is directed into branches supplying the liver segments scheduled for resection. Embolic materials such as particles, coils, plugs, liquid agents, or combinations of these materials are delivered to stop flow through the targeted branches. Imaging at the end of the procedure confirms occlusion of the intended vessels and continued flow to the future liver remnant.

What Is Recovery Like After Portal Vein Embolization?

Patients are monitored after embolization for pain, bleeding, fever, changes in liver tests, and other complications. Mild abdominal discomfort, fatigue, or a temporary inflammatory response can occur during early recovery. Follow-up computed tomography or magnetic resonance imaging is used after an interval to measure growth of the future liver remnant and reassess surgical planning. Liver resection proceeds only when the remnant has grown adequately and the underlying disease remains suitable for surgery.

What Are the Risks and Complications?

Possible complications include bleeding, infection, fever, abdominal pain, liver injury, and problems at the access site. Embolic material can rarely enter an unintended portal branch and compromise blood flow to the future liver remnant. Portal vein thrombosis can extend beyond the targeted branches and interfere with later surgery. Some patients have insufficient liver growth or tumor progression during the waiting period and therefore do not proceed to the planned resection.

Frequently Asked Questions About Portal Vein Embolization

Why does portal vein embolization make the other side of the liver grow?

Blocking portal flow to the liver portion planned for removal redirects blood and growth signals toward the future liver remnant, stimulating compensatory hypertrophy.

Does portal vein embolization remove a liver tumor?

No. It is a preparation procedure before planned liver resection. The tumor remains in place until surgery or another cancer treatment is performed.

How is liver growth checked after portal vein embolization?

Cross-sectional imaging, commonly computed tomography or magnetic resonance imaging, is used to measure the future liver remnant and assess whether growth is adequate.

Can liver surgery still be canceled after portal vein embolization?

Yes. Surgery can be reconsidered if liver growth is inadequate, the disease progresses, new medical problems develop, or the operation is no longer considered safe.

References

Preoperative Portal Vein Embolization: Basics Interventional Radiologists Need to Know. PubMed Central (PMC). https://pmc.ncbi.nlm.nih.gov/articles/PMC11570156/. Date Accessed August 13, 2026.

Preoperative Portal Vein Embolization in Hepatic Surgery. PubMed. https://pubmed.ncbi.nlm.nih.gov/32148959/. Date Accessed August 13, 2026.

Portal Vein Embolization as an Oncosurgical Strategy Prior to Major Hepatic Resection: Anatomic, Surgical, and Technical Considerations. PubMed. https://pubmed.ncbi.nlm.nih.gov/27014696/. Date Accessed August 13, 2026.

Portal vein embolization: rationale, technique, and current application. PubMed. https://pubmed.ncbi.nlm.nih.gov/23729977/. Date Accessed August 13, 2026.

Portal vein embolization before liver resection: a systematic review. PubMed. https://pubmed.ncbi.nlm.nih.gov/22806245/. Date Accessed August 13, 2026.