Autoimmune hepatitis: Difference between revisions
| Line 41: | Line 41: | ||
==Evaluation== | ==Evaluation== | ||
===Workup=== | |||
*[[LFTs]] | *[[LFTs]] | ||
**ALT/AST 1.5-50 times normal | **ALT/AST 1.5-50 times normal | ||
| Line 52: | Line 53: | ||
*Ammonia if suspect [[hepatic encephalopathy]] | *Ammonia if suspect [[hepatic encephalopathy]] | ||
*[[Paracentesis]] if suspect [[SBP]] | *[[Paracentesis]] if suspect [[SBP]] | ||
* | *Consider [[RUQ ultrasound]] and/or MRCP | ||
===Diagnosis=== | |||
*Evaluate for other causes of liver disease, if not previously diagnosed with autoimmune hepatitis: | *Evaluate for other causes of liver disease, if not previously diagnosed with autoimmune hepatitis: | ||
**[[Viral hepatitis]] serologies | **[[Viral hepatitis]] serologies | ||
**[[Acetaminophen]] level | **[[Acetaminophen]] level | ||
* | *Autoantibodies: may have positive ANA, SMA, LKM-1, and/or anti-LC1<ref>http://emedicine.medscape.com/article/172356-overview</ref> ; ANA & SMA usually positive in type 1 autoimmune hepatitis, LJM-1 and atypical p-ANCA positive in type 2 and liver soluble antigen usually in type 3 | ||
*Definitive diagnosis usually by liver biopsy | *Definitive diagnosis usually by liver biopsy | ||
Revision as of 18:09, 7 September 2022
Background
- Hepatocellular inflammation caused by autoimmune pathology, ultimately leading to necrosis and cirrhosis
- Presentation may be acute or chronic, rarely presents as fulminant hepatic failure
- Usually affects women (~70%[1] between age 15-40 years
- Often occurs comorbidly with other autoimmune disorders (e.g. type 1 diabetes, thyroid disease, inflammatory bowel disease, Sjögren's)
- 3 subtypes of autoimmune hepatitis: types 1-3, with type 1 being the most common
Clinical Features
Findings of liver disease and systemic signs/symptoms of autoimmune disorders
- Nausea/vomiting, diarrhea
- Epigastric pain, RUQ pain
- Anorexia
- Jaundice
- Ascites, SBP, edema
- Pruritus
- Fatigue, malaise, weakness
- Arthralgia, myalgia
- Spider angiomata, hirsutism, amenorrhea
- Chest pain due to pleuritis
- Weight loss
- Hepatosplenomegaly
- Hepatic encephalopathy
- Coagulopathy
- GI bleed
Differential Diagnosis
- Viral hepatitis
- Acute alcoholic hepatitis, alcoholic liver disease
- Acetaminophen toxicity and other drug-induced hepatotoxicity (
- Mushroom toxicity
- Ischemic hepatitis
- Non-alcoholic steatohepatitis
- Cardiac cirrhosis
- Primary biliary cirrhosis
- primary sclerosing cholangitis
- Budd-Chiari
- Alpha1 anti-trypsin Deficiency
- Cystic Fibrosis
- Wilson's disease
- Sarcoidosis
Evaluation
Workup
- LFTs
- ALT/AST 1.5-50 times normal
- Mild to moderate elevations in bilirubin and alk phos
- CBC
- +/- mild leukopenia,
- +/- normocytic or hemolytic anemia
- +/- thrombocytopenia
- BMP: evaluate for electrolyte derangements, hypoglycemia, hepatorenal syndrome
- PT/INR
- Ammonia if suspect hepatic encephalopathy
- Paracentesis if suspect SBP
- Consider RUQ ultrasound and/or MRCP
Diagnosis
- Evaluate for other causes of liver disease, if not previously diagnosed with autoimmune hepatitis:
- Viral hepatitis serologies
- Acetaminophen level
- Autoantibodies: may have positive ANA, SMA, LKM-1, and/or anti-LC1[2] ; ANA & SMA usually positive in type 1 autoimmune hepatitis, LJM-1 and atypical p-ANCA positive in type 2 and liver soluble antigen usually in type 3
- Definitive diagnosis usually by liver biopsy
Management
- Corticosteroids +/- Azathioprine
- Manage complications, see:
- Ultimately, may require transplant
- Hepatology/Gastroenterology consult should be made