First report of centroblastic lymphoma in a human immunodeficiency virus-positive patient with a rare congenital coagulation disorder (factor X Friuli).

The association of lymphoma and human immunodeficiency virus (HIV) seropositivity in a patient with a rare congenital clotting disorder (Factor X Friuli) is reported. The propositus was a previously asymptomatic HIV-positive 46-year-old man who suddenly presented a rapidly evolving right exophthalmos due to a centroblastic lymphoma, as the presenting symptom of full-blown AIDS. The clinical picture was characterized by unusual site of presentation, advanced stage and fatal course over a short period of time, despite therapy. Bone marrow, but not lymph node or parenchymal involvement, was present. Central nervous system involvement, with an unusual diffuse and massive pattern, and the B-cell origin of the lesion were demonstrated at autopsy. Few reports exist so far about the association of malignancy and HIV in patients with congenital coagulation disorders and this is the first report about a defect other than classic hemophilia.