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Opportunistic hepatic infections in AIDS patients with fever of unknown origin.

The clinical features and histopathologic manifestations of hepatic opportunistic infections in patients with acquired immunodeficiency syndrome (AIDS) in Taiwan remain unexplored. We report 28 AIDS patients (25 men, 3 women; mean age, 34 years) with fever of unknown origin who underwent 31 liver biopsies from December 1995 to May 1997. In most cases, the biochemical tests showed moderate to markedly elevated alkaline phosphatase concentrations, but normal or mildly elevated aminotransferase concentrations. The most common histopathologic finding was macrosteatosis, which was noted in 15 of the 28 patients. Another important histopathologic finding indicating the etiology of hepatic opportunistic infection was granuloma, which was found in 11 patients. Histochemical stain and culture of liver specimens yielded Mycobacterium avium complex (MAC) in eight patients, Mycobacterium tuberculosis in two patients, Histoplasma capsulatum in one patient, and cytomegalovirus in one patient with concomitant MAC infection. Therefore, a definitive diagnosis in AIDS patients with fever of unknown origin was made in 11 of the 28 cases with the assistance of liver biopsy. During follow-up, late extrahepatic involvement by the same infectious agents was found in six patients. Thus, hepatic manifestations could be a harbinger of disseminated opportunistic infections in AIDS patients.