Significance of the levels of bone marrow lymphoid infiltrate in chronic lymphocytic leukemia patients with nodular partial remission.
Patients with chronic lymphocytic leukemia (CLL) are considered in nodular partial remission (nPR) when they are in remission but bone marrow biopsies show rare nodules. The significance of the level of residual disease in nPR is not known. We studied 91 previously untreated CLL patients who were treated with fludarabine alone, fludarabine with prednisone, or fludarabine with cyclophosphamide and achieved nPR at the end of six courses. We compared bone marrow lymphoid infiltration before therapy and at the end of three and six courses of therapy as evaluated by a pathologist in retrospective fashion with that of the routine evaluation at the time of performing bone marrow biopsy. We then compared these results with those obtained by computer-aided histomorphometry in 28 patients in nPR. There was significant correlation (P < 0.05) between pathologists as well as between pathologists and histomorphometry. Upon correlation with clinical characteristics, there was significant correlation (P 0.01) between marrow involvement before therapy and white blood cell counts (wbc), hemoglobin (hgb), absolute lymphocyte counts, and beta2-microglobulin (beta2-m) but none of these parameters correlated with the lymphoid infiltrate at the end of three or six courses of therapy. more importantly, lymphoid infiltration after three and six courses did not correlate with time to progression (ttp) or overall survival (os). however, patients with >70% marrow involvement before therapy had a significantly shorter TTP (P = 0.02). All 91 patients showed similar results. However, we found reverse correlation between marrow lymphoid infiltrate at the end of three courses and OS (P = 0.01).
Oudat
R
R
Department of Hematopathology, University of Texas MD Anderson Cancer Center, Houston, TX 77030, USA.
Keating
M J
MJ
Lerner
S
S
O'Brien
S
S
Albitar
M
M
D000368:Aged; D000971:Antineoplastic Combined Chemotherapy Protocols / Q000627:therapeutic use; D001707:Biopsy, Needle; D001853:Bone Marrow / Q000473:pathology*; D001856:Bone Marrow Examination; D018450:Disease Progression; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000401:mortality / Q000473:pathology* / Q000628:therapy; D017254:Leukemic Infiltration / Q000473:pathology*; D008224:Lymphoma, Follicular / Q000401:mortality / Q000473:pathology / Q000628:therapy; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012074:Remission Induction; D015996:Survival Rate