“…We investigated bone marrow biopsies from 260 patients with lymphoproliférative disorders using an immunoperoxidase method on cryostat sections [2,3]. Our data are in agreement with theirs, especially con cerning the fact that the monoclonal anti body (MoAb) Leu-M5 (CDllc) is expressed in HCL in up to 100% of the cases.…”