History and clinical findings: A 44-year-old heterosexual man reported having been jaundiced for 4 days. He drank little alcohol. There was no history of venereal disease.
Investigations: Laboratory tests indicated marked cholestasis (alkaline phosphatase 1589 U/I, gamma-GT 449 U/I), but only moderately raised transaminases (GOT 66 U/I, GPT 230 U/I), with a bilirubin level of 4.8 mg/dl. Ultrasonography revealed diffuse parenchymal damage in the liver, while endoscopic retrograde cholangiopancreatography showed no abnormalities. Viral hepatitis was excluded by serological tests. Histology of a liver biopsy showed inflammatory infiltration of the portal areas and of the liver parenchyma. Routine syphilis serology indicated fresh infection with Treponema pallidum. There was a healing painless ulcer in the area of the sulcus coronarius of the genitals.
Treatment and course: 2.4 mill. I.U. benzathine benzylpenicillin were administered intramuscularly. This rapidly improved his condition and liver function tests became normal.
Conclusion: In case of hepatitis of uncertain genesis syphilis should be considered as a possible cause, even in the absence of other signs of the disease.