A primary biliary diffuse large B-cell lymphoma mimicking Klatskin Tumor in an HIV patient.

The patient was continued on ATRIPLA and finished 5 out of 6 cycles of R-CHOP-21 chemotherapy (rituximab, cyclophosphamide, doxorubicin, vincristine, prednisone), complicated by multiple episodes of neutropenic fever. After the 3rd cycle, a positron emission tomography/CT scan showed no evidence of active mass lesion or lymphadenopathy. After 10 months of follow-up, the patient continues to demonstrate no evidence of disease.