Causes of Right or Left Hepatectomy

Liver surgery, specifically a hepatectomy, is a critical procedure performed to remove a portion of the liver. Depending on the patient’s condition, a right or left hepatectomy may be recommended by hepatobiliary surgeons. These terms refer to the surgical removal of either the right or left lobe of the liver. While this might sound alarming, such procedures are often lifesaving and curative in various liver-related diseases. Understanding the causes of right or left hepatectomy that necessitate a right or left hepatectomy is essential for patients, caregivers, and those seeking deeper knowledge about liver health.

What is a Hepatectomy?

A hepatectomy is a surgical procedure that involves the removal of a portion of the liver. The human liver is divided into two main lobes right and left each further segmented into functional units. A right hepatectomy removes the right lobe, which includes segments V, VI, VII, and VIII. A left hepatectomy involves removing the left lobe, comprising segments II, III, and IV. In some cases, extended hepatectomies may be performed, depending on the spread of disease or location of tumors.

Now let’s explore the major causes that lead to the need for these complex but often necessary surgeries.

1. Liver Cancer (Primary Hepatic Malignancies)

   One of the most common and serious causes of right or left hepatectomy is primary liver cancer, particularly hepatocellular carcinoma (HCC). This type of cancer often arises in patients with underlying liver conditions such as chronic hepatitis B or C, cirrhosis, or fatty liver disease.

   • Right hepatectomy is often chosen when the tumor is localized in the right lobe.
   • Left hepatectomy is performed when the cancer affects the left lobe.

   The surgical goal is to remove the cancerous tissue with a margin of healthy liver tissue to ensure complete resection while preserving adequate liver function.

2. Liver Metastases (Secondary Liver Cancer)

   The liver is a common site for metastasis, especially from cancers of the colon, rectum, pancreas, breast, or stomach. These secondary liver tumors may require hepatectomy when they are confined to one lobe and cannot be managed through non-surgical methods.

   • A right or left hepatectomy is performed depending on the location and extent of metastases.
   • Often used in conjunction with chemotherapy, surgical resection offers a chance for long-term survival in select patients.

3. Benign Liver Tumors

   Although non-cancerous, some benign liver tumors can grow large enough to cause symptoms, compress nearby organs, or carry a risk of rupture. Common benign tumors include:

   • Hepatic adenoma :- Often seen in young women and associated with oral contraceptive use.
   • Focal nodular hyperplasia (FNH) :- Usually asymptomatic but may require resection if symptomatic or suspicious on imaging.
   • Giant hemangiomas :- Vascular tumors that may bleed or cause pressure symptoms.

   If these tumors are localized to one lobe and are symptomatic or carry potential complications, a hepatectomy is often the preferred treatment.

4. Liver Trauma

   Severe abdominal trauma, especially due to accidents, can lead to liver lacerations or rupture. When conservative measures fail or bleeding is uncontrollable, a hepatectomy may be needed as a lifesaving procedure.

   • A right or left hepatectomy is considered based on the site of injury.
   • Emergency surgery in trauma settings requires rapid decision-making and skilled surgical intervention.

5. Intrahepatic Cholangiocarcinoma

   Cholangiocarcinoma is a bile duct cancer that can occur within the liver (intrahepatic) or outside of it. When localized within the liver, this rare but aggressive cancer often necessitates surgical resection.

   • A right hepatectomy is more common due to the anatomical predominance of bile duct branches in the right lobe.
   • A left hepatectomy is done if the tumor is confined to the left intrahepatic ducts.

   Early detection and surgery offer the best chance for improved outcomes.

6. Congenital or Structural Liver Abnormalities

   In some cases, patients may be born with or develop structural liver abnormalities that interfere with normal function or cause complications. These include:

   • Biliary cystadenomas or cystadenocarcinomas :- Rare cystic tumors that can be malignant.
   • Liver cysts :- Large or multiple cysts that cause pain, bleeding, or infection.
   • Carolic disease :- A congenital disorder that causes dilation of bile ducts and can lead to recurrent infections and stone formation.

   When confined to one lobe, a targeted hepatectomy can help in long-term symptom control and disease management.

7. Parasitic Infections (Hydatid Disease)

   In some regions, particularly where echinococcal infections are endemic, the liver may become host to large parasitic cysts. If medical treatment fails or the cysts are large and localized, a right or left hepatectomy may be the best option.

   • Surgery prevents cyst rupture and secondary infection.
   • Removal of the affected lobe eliminates disease and reduces recurrence risk.

8. Fibrolamellar Carcinoma

   This is a rare variant of hepatocellular carcinoma, seen more commonly in adolescents and young adults without underlying liver disease. These tumors are typically resectable and require a lobar hepatectomy depending on the tumor’s location.

9. Liver Abscesses or Necrosis

   In rare cases, patients may develop unresolving liver abscesses or areas of liver necrosis due to infection, ischemia, or drug toxicity. If medical treatment fails and the affected area is localized, surgical removal via hepatectomy may be considered.

   • Prevents spread of infection or sepsis.
   • Helps restore overall hepatic function in certain cases.

Conclusion

A right or left hepatectomy is a complex but potentially curative procedure used in the treatment of a variety of liver conditions. Whether caused by primary liver cancer, metastasis, benign tumors, trauma, congenital anomalies, or infection, the decision to perform a lobar hepatectomy is made after careful diagnostic evaluation, imaging studies, and multidisciplinary consultation.

Thanks to advancements in surgical techniques and preoperative planning, outcomes have significantly improved, offering patients a better quality of life and, in many cases, a full recovery. If you or a loved one are facing liver surgery, understanding the underlying cause and the rationale for hepatectomy is the first step toward informed decision-making and effective treatment.