“…Only 10%-15% of cases are reported to occur in patients below 40 years of age [2]. Given the rare occurrence of simultaneous bilateral CRVO in a previously healthy patient, further testing was prompted to assess for common causes for serum hyperviscosity, such as Waldenstrom's macroglobulinemia, hyperhomocysteinemia, multiple myeloma, acute myeloid leukemia (AML), polycythemia, and chronic myeloid leukemia (CML), revealing our patient's underlying oncologic disease process, ALL [3][4][5][6][7][8][9].…”