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PubMed This is a summary of 18 peer-reviewed journal articles Updated
Hepatology

Diagnosis, Imaging, and Severity Classification for PCLD

At a Glance

Isolated polycystic liver disease (PCLD) is diagnosed when imaging shows over 10-20 liver cysts. Doctors determine severity by calculating your height-adjusted total liver volume (htTLV) and using the Gigot classification to map cyst distribution, which helps guide your treatment options.

Navigating an imaging report for Isolated Polycystic Liver Disease (PCLD) can feel like learning a new language. Doctors use specific clinical criteria and classification systems to move beyond just seeing “many cysts” to understanding exactly how the condition is affecting your body and what the next steps should be [1][2].

The Clinical Diagnosis

For most patients, the formal diagnosis of PCLD is made through imaging (ultrasound, CT, or MRI) when more than 10 to 20 cysts are identified in the liver, provided there is no significant kidney involvement [1][3]. While many people have one or two simple cysts, having a large number is the hallmark of the genetic condition [4].

Categorizing Severity: Gigot and Schnelldorfer

To determine the best treatment, doctors use classification systems that describe how the cysts are distributed.

  • Gigot Classification: This is the most common system used to describe the liver’s appearance on a scan [5][2].
    • Type I: A small number of large cysts (usually fewer than 10) with plenty of healthy, normal liver tissue in between [2][6].
    • Type II: Multiple cysts spread throughout the liver, but there are still large areas of normal liver tissue [2].
    • Type III: Massive, diffuse cystic involvement. The cysts are everywhere, and there is very little visible “normal” liver tissue left [2][6].
  • Schnelldorfer Classification: This system is often used by surgeons to decide if a patient is a candidate for surgery, such as fenestration (popping and draining cysts) or a liver resection (removing a portion of the liver) [7][5]. You generally do not need to know your Schnelldorfer type unless you are actively planning a surgical procedure, as it focuses on the specific segments of the liver affected [7].

Total Liver Volume (TLV) and htTLV

While the Gigot type tells doctors what the liver looks like, Total Liver Volume (TLV) tells them how big it is. This is measured in milliliters (mL) using specialized software on CT or MRI scans [8][9].

Because a 5-foot-tall person and a 6-foot-tall person have different amounts of “room” in their abdomen, doctors use height-adjusted Total Liver Volume (htTLV) to normalize the measurement [10][11]. This is calculated as:

htTLV=Total Liver Volume (mL)Patient Height (m)\text{htTLV} = \frac{\text{Total Liver Volume (mL)}}{\text{Patient Height (m)}}

Severity is generally grouped into three categories based on htTLV [12][13]:

  • Mild: Less than 1,600 mL/m.
  • Moderate: 1,600 to 3,200 mL/m.
  • Severe: Greater than 3,200 mL/m.

Patients in the moderate and severe categories have a significantly higher risk of symptoms like back pain, shortness of breath, and abdominal fullness [12][13].

What Your Imaging Report Should Include

A comprehensive imaging report for PCLD should provide more than just a list of cysts. It serves as a roadmap for your care and should ideally include [14][15]:

  1. Volumetric Measurement: An exact TLV or htTLV measurement to track growth over time [14][8].
  2. Dominant Cysts: Identification of any exceptionally large cysts that might be causing specific symptoms and could be treated with drainage (sclerotherapy) [6][16].
  3. Vascular Compression: A check for whether the liver is pressing on major blood vessels, such as the inferior vena cava or hepatic veins [17][15].
  4. Biliary Involvement: Any signs that cysts are pressing on the bile ducts, which could cause jaundice or infection [17].
  5. Atypical Features: Documentation of any cysts that look “unusual” (thick walls, solid components) to ensure they are benign and not something else [18].

Return to the Home Page.

Common questions in this guide

What is the Gigot classification for PCLD?
The Gigot classification is a system doctors use to describe how cysts are distributed throughout your liver. It ranges from Type I, meaning you have a few large cysts with plenty of healthy tissue, to Type III, where cysts are spread everywhere with very little visible normal tissue remaining.
What does htTLV mean on my liver scan?
Height-adjusted Total Liver Volume (htTLV) measures the exact size of your liver relative to your height. Doctors use this calculation to classify your condition as mild, moderate, or severe, which helps predict your risk for symptoms like abdominal fullness or shortness of breath.
How many cysts are needed to diagnose PCLD?
For most patients, a formal diagnosis of isolated polycystic liver disease is made when an ultrasound, CT, or MRI scan finds more than 10 to 20 cysts in the liver, assuming there is no significant kidney involvement.
What are dominant cysts in the liver?
Dominant cysts are exceptionally large cysts that stand out from the smaller ones on your scan. These specific cysts are often responsible for causing symptoms like pain or fullness, and they may be targeted for treatments like drainage.
Why does my imaging report check for vascular compression?
As your liver grows from the cysts, it can press against major blood vessels like the inferior vena cava or hepatic veins. Checking for this pressure is important because it can lead to complications such as leg swelling or hernias.

Questions to Ask Your Doctor

Curated prompts to bring to your next appointment.

  1. 1.What is my specific height-adjusted Total Liver Volume (htTLV) and how does it compare to the 'mild,' 'moderate,' and 'severe' thresholds?
  2. 2.Am I considered Gigot Type I, II, or III, and how does this classification impact which treatments are options for me?
  3. 3.Does my imaging show any signs of 'mass effect' complications, such as pressure on the hepatic veins or the inferior vena cava?
  4. 4.Are there any 'dominant' cysts in my liver that are significantly larger than the others and might be targets for drainage?
  5. 5.How much has my liver volume changed since my last scan, and what does that tell us about my rate of progression?

Questions For You

Tap a prompt to share your answer — we'll use it plus this page's context to start a tailored conversation.

References

References (18)
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    Polycystic Liver Disease: Pathophysiology, Diagnosis and Treatment.

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    Hepatic medicine : evidence and research 2022; (14()):135-161 doi:10.2147/HMER.S377530.

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    Abdominal wall hernia is a frequent complication of polycystic liver disease and associated with hepatomegaly.

    Barten TRM, Bökkerink RMP, Venderink W, et al.

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    Apixaban Causing Hepatic Cystic Bleeding: A Rare but a Life-Threatening Complication.

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    TIMING AND TREATMENT OPTIONS IN ADULT POLYCYSTIC LIVER DISEASE: A RARE FAMILIAR CASE AS EXAMPLE.

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    Long-term results of liver transplantation for polycystic liver disease: Single-center experience in China.

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    Validation of a semi-automatic method to measure total liver volumes in polycystic liver disease on computed tomography - high speed and accuracy.

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    Automatic Measurement of Kidney and Liver Volumes from MR Images of Patients Affected by Autosomal Dominant Polycystic Kidney Disease.

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This page explains PCLD imaging and diagnosis terminology for educational purposes only. Always consult your hepatologist or gastroenterologist to interpret your specific scan results and determine your treatment plan.

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