Caroli syndrome

What it is

From: Orphanet

A rare genetic hepatic disease characterized by multiple segmental cystic dilatations of both central and smaller peripheral bile ducts associated with congenital hepatic fibrosis. Age of symptom onset is variable, as is disease progression. Patients present recurrent cholangitis, hepatolithiasis, and cholecystolithiasis. Portal hypertension may appear later in the disease course, and the risk of developing cholangiocarcinoma is increased significantly. The syndrome is often associated with autosomal recessive polycystic kidney disease.

Reported clinical features and what the terms mean

The following findings are associated with this condition in Orphanet. They are not a checklist for diagnosing yourself, and they do not all occur in every affected person. Some are examination, imaging or laboratory findings that cannot be recognised at home.

The frequency labels describe how often a finding was reported among people with the condition in the source. They do not give the chance that a person with that symptom has the condition. Definitions below reproduce HPO terminology; they explain the term, not the likely severity in an individual.

Abnormality of the intrahepatic bile duct · Very frequent (99-80%)

An abnormality of the intrahepatic bile duct.

Intrahepatic cholestasis · Very frequent (99-80%)

Impairment of bile flow due to obstruction in the small bile ducts within the liver.

Abdominal pain · Frequent (79-30%)

An unpleasant sensation characterized by physical discomfort (such as pricking, throbbing, or aching) and perceived to originate in the abdomen.

Abdominal rigidity · Frequent (79-30%)

Involuntary tightening of the abdominal musculature that occurs in response to touching the abdomen to avoid pain. Rigidity can occur in the presence of abdominal inflammation and usually involves only the inflamed area.

Abnormality of the kidney · Frequent (79-30%)

An abnormality of the kidney.

Chills · Frequent (79-30%)

A sudden sensation of feeling cold.

Cholangitis · Frequent (79-30%)

Inflammation of the biliary ductal system, affecting the intrahepatic or extrahepatic portions, or both.

Elevated circulating alkaline phosphatase concentration · Frequent (79-30%)

Abnormally increased serum levels of alkaline phosphatase activity.

Fever · Frequent (79-30%)

Body temperature elevated above the normal range.

Hepatomegaly · Frequent (79-30%)

Abnormally increased size of the liver.

Hyperbilirubinemia · Frequent (79-30%)

An increased amount of bilirubin in the blood.

Jaundice · Frequent (79-30%)

Yellow pigmentation of the skin due to bilirubin, which in turn is the result of increased bilirubin concentration in the bloodstream.

Conjugated hyperbilirubinemia · Frequent (79-30%)

Abnormal bleeding · Occasional (29-5%)

An abnormal susceptibility to bleeding, often referred to as a bleeding diathesis. A bleeding diathesis may be related to vascular, platelet and coagulation defects.

Other findings in the same source

From: Orphanet

Additional reported features include Abnormality of the ductus choledochus (Occasional (29-5%)); Cholangiocarcinoma (Occasional (29-5%)); Cirrhosis (Occasional (29-5%)); Congenital hepatic fibrosis (Occasional (29-5%)); Conjunctival icterus (Occasional (29-5%)); Elevated circulating hepatic transaminase concentration (Occasional (29-5%)); Elevated erythrocyte sedimentation rate (Occasional (29-5%)); Esophageal varix (Occasional (29-5%)); Hematemesis (Occasional (29-5%)); Hypersplenism (Occasional (29-5%)). This is a selected summary, not a complete description of the condition.

When it may begin

From: Orphanet

All ages

Inheritance in the source

From: Orphanet

Autosomal recessive

Frequency and the population described

From: Orphanet

Point prevalence: Unknown; Worldwide; Class only.

Understanding the inheritance label

From: MedlinePlus Genetics

An autosomal recessive pattern usually involves disease-causing changes in both copies of a gene. Parents may each carry one altered copy without having the condition themselves. A genetic counsellor can explain carrier testing and reproductive implications using the actual laboratory findings, rather than the condition name alone.

Which doctor should you see?

The suggested department for discussing Caroli syndrome is Hepatology, with a hepatologist / gastroenterologist as the relevant type of clinician. General physician / Family Medicine; paediatrician for children. Referral depends on symptoms.

This is an editorial referral starting point. The appropriate clinic depends on the person’s age, symptoms, previous diagnosis and local services. The first clinician can decide whether another specialty or a team is needed; a department label does not confirm the diagnosis.

How to prepare for an assessment

Bring a short timeline of the main symptoms: when they first appeared, whether they are constant or episodic, what seems to change them, and how they affect daily activities. Include previous reports, discharge summaries, current medicines and supplements, allergies, and any relevant family history. A dated record is more useful than trying to match every feature in an online article.

Ask the clinician what is already established and what remains uncertain. If a test is suggested, ask what question it answers, what its limitations are and how the result would change the next step. The information here is not an instruction to arrange every possible test. In children, bring growth, developmental and school information if it is relevant to the concern.

• What is known about the cause and extent of liver involvement?
• Which medicines, supplements or exposures should be reviewed?
• What follow-up is appropriate for the specific diagnosis and stage?

Treatment discussions and follow-up

The material gathered for this draft does not provide a complete condition-specific treatment pathway for Caroli syndrome. That gap does not mean that treatment is unavailable. A clinician needs to establish the diagnosis and review current guidance before recommending medicines, procedures, rehabilitation or other support.

Before leaving the appointment, clarify the next review date, who will communicate results, and whom to contact if the situation changes. Discuss difficulties with sleep, work, school, mobility, eating or emotional wellbeing when these are relevant. Practical support may require coordination between the treating clinician and other services.

The collected references do not establish a complete prevention or long-term outlook section for this entry. Missing information should not be interpreted as proof that prevention is impossible or that a particular outcome is inevitable. Ask what is known for the exact subtype, stage and personal circumstances, and which uncertainties remain.

When to seek emergency help

Severe breathing difficulty, collapse, new stroke-like symptoms, a seizure that is prolonged or repeated without recovery, uncontrolled major bleeding, or an immediate risk of self-harm require emergency help. In India, call 112 or reach the nearest emergency department. This is a general, non-exhaustive warning list; it is not a condition-specific triage tool.