Question: A 69-year-old renal transplant patient was hospitalized because of persistent dyspepsia, anorexia with progressive weight loss, and intermittent loose stools. She received a cadaveric kidney 18 months ago complicated by an acute antibody-mediated rejection that was treated with corticosteroids, plasma exchange, antithymocyte, and γ-globulins, resulting in a stable renal transplant function (estimated glomerular filtration rate, 43 mL/min/1.73 m2 without proteinuria) under triple maintenance immunosuppressive therapy (methylprednisolone, 2 mg/d; tacrolimus trough level, 8 μg/mL; and mycophenolate, 2 × 500 mg/d).