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Is nodular regenerative hyperplasia of the liver associated with azathioprine therapy after renal transplantation?

A 33-year-old man presented with hepatosplenomegaly and ascites 26 months after receiving a successful renal transplant. Immunosuppression consisted of low-dose prednisolone and azathioprine. Biopsy showed characteristic features of nodular regenerative hyperplasia of liver (NRHL), a condition which may be related to azathioprine therapy but has rarely been reported in association with renal transplantation.