Quadri-lineage disease involving nodal B-cell marginal zone lymphoma, high-grade B-cell lymphoma, Kaposi's syndrome, and acute myeloid leukemia.

A patient with a marginal zone lymphoma received RCHOP and obtained PR. He received RDHAP, autograft, and obtained CR. Three months later, he developed Kaposi's sarcoma with spontaneous regression. Two months later, he developed DLBCL treated with R-MIV with CR. Thereafter, he developed AML and died a few days later.