Cholangiohepatitis — inflammation of the liver and bile ducts — is the most common liver disease complex in cats. It often occurs alongside inflammatory bowel disease and pancreatitis (the "feline triad"), meaning treatment must address all three conditions simultaneously.
Last reviewed: June 2026
What Is Feline Cholangiohepatitis?
Cholangiohepatitis refers to inflammation of both the biliary system (bile ducts and gallbladder) and the surrounding liver tissue. As described in Nelson & Couto's Small Animal Internal Medicine, there are two main forms: neutrophilic (suppurative) cholangiohepatitis, caused by ascending bacterial infection from the intestine, and lymphocytic cholangiohepatitis, an immune-mediated disease with a more chronic, insidious course. Middle-aged to older cats are most commonly affected. Because the bile duct enters the small intestine in close anatomical proximity to the pancreatic duct in cats, inflammation readily spreads between the intestine, pancreas, and liver — producing the classic "triad" seen in 25–50% of affected cats. AAFP Senior Care Guidelines, 2021 highlight liver disease workup as a priority in any senior cat with non-specific weight loss or lethargy.
Signs of Cholangiohepatitis in Cats
- Jaundice (yellow tinge to skin, gums, and whites of eyes) — yellow bilirubin accumulates when bile cannot flow normally
- Loss of appetite — often the first owner-noticed sign
- Weight loss, sometimes dramatic
- Lethargy and reduced activity
- Vomiting — sporadic or chronic
- Diarrhea if inflammatory bowel disease is concurrent
- Enlarged liver on physical exam (hepatomegaly)
- Ascites (fluid accumulation in the abdomen) in severe chronic cases
- Fever in the neutrophilic (bacterial) form
Diagnosis
Diagnosis requires blood tests (elevated liver enzymes — ALT, ALP, GGT, bilirubin; total protein; complete blood count), abdominal ultrasound (liver texture, bile duct diameter, gallbladder abnormalities, concurrent pancreatic changes), and liver biopsy for definitive classification. Biopsy distinguishes neutrophilic from lymphocytic forms — a distinction that fundamentally changes treatment. Bile culture at the time of biopsy guides antibiotic selection for neutrophilic cases.
Treatment
Neutrophilic cholangiohepatitis: targeted antibiotics (amoxicillin-clavulanate or fluoroquinolone based on culture) for 4–8 weeks; supportive care with ursodiol (helps bile flow), SAMe, and milk thistle for hepatoprotection; nutritional support.
Lymphocytic cholangiohepatitis: immunosuppressive doses of prednisolone (2–4 mg/kg/day tapering over months); ursodiol; high-quality protein diet (not restricted unless hepatic encephalopathy is present). Treatment is long-term, often lifelong.
For all cats: ursodiol (10–15 mg/kg once daily) improves bile flow and has cytoprotective effects; B12 (cobalamin) supplementation for concurrent GI malabsorption; appetite stimulants (mirtazapine) if anorexia persists more than 48 hours to prevent hepatic lipidosis.
Costs
Initial diagnostics (blood panel, ultrasound): $350–700. Liver biopsy under sedation or anesthesia: $800–1,800. Long-term medication (prednisolone, ursodiol, B12): $40–120/month. Total first-year treatment cost for chronic lymphocytic form: $1,500–4,000+.
When to See a Vet
Call your vet today if:
- Your cat's gums, skin, or eye whites look yellow
- Cat has lost more than 5% body weight without a known reason
- Appetite has been reduced for more than 3–4 days
Go to the ER immediately if:
- Cat has stopped eating completely for 48+ hours (high hepatic lipidosis risk)
- Jaundice is severe and progressing rapidly
- Cat is confused, head-pressing, or having seizures (hepatic encephalopathy)
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Frequently Asked Questions
What does a cat with cholangiohepatitis look like? The most visible sign is jaundice — yellowing of the skin, gums, or the whites of the eyes. Owners often describe a cat that's "off" — eating less, less active, occasionally vomiting, and gradually losing weight over weeks. Some cats have a fever in the bacterial form.
Can cholangiohepatitis be cured in cats? The bacterial (neutrophilic) form can often be resolved with appropriate antibiotics if caught early. The immune-mediated (lymphocytic) form is typically a managed condition requiring long-term or lifelong immunosuppression. Many cats maintain good quality of life with treatment for years.
What does treating cholangiohepatitis cost? Diagnostic workup (blood tests, ultrasound, biopsy) typically runs $1,200–2,500. Ongoing monthly medications cost $40–120. Nutritional support and follow-up visits add $200–600/year. First-year total treatment cost commonly reaches $2,000–5,000.
Is cholangiohepatitis the same as IBD in cats? They often coexist but are distinct diseases. IBD (inflammatory bowel disease) involves the intestinal wall; cholangiohepatitis involves the liver and bile ducts. Because of the shared bile and pancreatic duct anatomy in cats, inflammation in one organ frequently triggers or accompanies inflammation in the others — producing the "triad" of IBD + pancreatitis + cholangiohepatitis.
What diet is recommended for cats with cholangiohepatitis? A high-quality, easily digestible protein diet is preferred — protein restriction is NOT routinely recommended unless hepatic encephalopathy (neurological signs from ammonia buildup) is present. As noted in WSAVA Global Nutrition Guidelines, adequate protein supports liver regeneration. Wet food is preferred for hydration.
Still Not Sure if Your Cat Needs a Vet?
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