Journal List > Korean J Gastroenterol > v.65(1) > 1007393

Jhee, Kim, Kang, Kim, and Kim: A Case of Autoimmune Hepatitis Combined with Graves' Disease

Abstract

A 25-year-old woman presented with jaundice, palpitation, and weight loss of 5 kg during a period of 2 weeks. Laboratory tests showed elevated levels of liver enzymes (AST 1,282 IU/L, ALT 1,119 IU/L) and total bilirubin (6.4 mg/dL); negative for hepatitis virus infection; elevated serum levels of triiodothyronine (T3, 3.60 ng/dL), free thyroxine (fT4, 3.82 ng/dL), and lowered serum level of thyroid stimulating hormone (TSH, <0.025 μIU/mL); and positive for thyroid stimulating antibody and anti-mitochondrial antibody (AMA). The liver biopsy findings were consistent with autoimmune hepatitis (AIH). Accordingly, oral steroid therapy was started with 60 mg of prednisolone under the impression of AIH associated with Graves' disease. After a week of steroid therapy, the clinical manifestation showed significant improvement, with normalization of both liver and thyroid functions. Diagnosis of the liver condition of patients who present with hyperthyroidism and liver dysfunction is important, so that appropriate therapy can be promptly initiated.

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Fig. 1.
Histologic findings of liver biopsies are consistent with autoimmune hepatitis (H&E, ×200). (A) Severe necroinflammatory activity with marked portal lymphoplasma cell infiltration with occasional eosinophils and mild ductular proliferation are seen within the portal tract. (B) Local infiltration of inflammatory cells within the lobules and damaged hepatocytes are seen, indicating lobular hepatitis.
kjg-65-48f1.tif
Fig. 2.
Clinical course of the patient.
kjg-65-48f2.tif
Table 1.
Laboratory Data on Admission
Laboratory data Result
Liver function test  
 AST (IU/L) 1,282
 ALT (IU/L) 1,119
 Total bilirubin (mg/dL) 6.4
 Direct bilirubin (mg/dL) 5.4
 GGT (mg/dL) 150
 ALP (IU/L) 136
 Albumin (g/dL) 4.0
 PT (INR) 1.05
Viral markers  
 IgM anti-HAV Negative
 HBsAg Negative
 Anti-HBc Negative
 Anti-HBs Negative
 Anti-HCV Negative
Thyroid function test  
 TSH <0.025
 Free T4 3.82
 T3 421.5
Autoantibodies  
 Thyroid stimulating antibody Positive
 Anti-LKM Negative
 ANA 1 : 40 negative
 Anti-smooth muscle antibody Negative
 AMA Positive

TSH, thyroid stimulating hormone; Anti-LKM, anti-liver/kidney microsomal type 1; ANA, anti-nuclear antibodies.

Table 2.
Simplified Diagnostic Criteria for AIH15
Variable Cutoff a Points
ANA or SM ≥1 : 40 1
ANA or SM ≥1 : 80  
Anti-LKM ≥1 : 40 2
Soluble liver antibody Positive  
IgG > Upper normal limit 1
  >1.10 times upper normal limit 2
Liver histology Compatible with AIH 1
  Typical AIH 2
Absence of viral hepatitis Yes 2

AIH, autoimmune hepatitis; ANA, anti-nuclear antibodies; SM, anti- smooth muscle antibodies; Anti-LKM, anti-liver/kidney microsomal type 1.

a ≥6, probable autoimmune hepatitis; ≥7, definite autoimmune hepatitis.

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