A Hispanic man in his 20s with no known medical history presented with worsening abdominal pain over 5 days, persistent pruritus, and scleral icterus. The patient noted swelling on the right side of the neck and a 10-lb weight loss over the past 2 months. He reported a history of moderate alcohol consumption, drinking 1 beer per day during the week and approximately 5 to 8 beers over the weekend, but denied any use of nutritional supplements or illicit drugs. There was no recent travel outside the state. Human immunodeficiency virus test results on admission were negative. Physical examination revealed scleral icterus, jaundice, and a fixed right supraclavicular lymph node conglomerate measuring 6 × 3 cm. There was no cervical, left supraclavicular, axillary, or inguinal lymphadenopathy. Computed tomography of the neck, chest, abdomen, and pelvis demonstrated a large right supraclavicular lymph node, extensive mediastinal lymphadenopathy, a large extracardiac mass abutting the left atrium, hepatomegaly, and multiple splenic lesions. Laboratory evaluation demonstrated a total serum bilirubin level of 10.5 mg/dL with a direct component of 8.4 mg/dL (to convert to micromoles per liter, multiply by 17.104). Renal function was normal. Mild leukopenia and slight thrombocytopenia in the absence of associated anemia was noted on initial complete blood cell count. A liver biopsy was performed, with results shown in Figure 1.