with follicular lymphoma (FL), but the biologic relationship between the 2 neoplasms is
unknown. We studied 8 patients with both FL and H/DC neoplasms using
immunohistochemistry, fluorescence in situ hybridization (FISH) for t (14; 18), and
polymerase chain reaction (PCR)/sequencing of BCL2 and IGH rearrangements. There
were 5 men and 3 women (median age, 59 years). All cases of FL were positive for t (14; …