PMID- 23735731 OWN - NLM STAT- MEDLINE DCOM- 20140602 LR - 20131007 IS - 1532-2971 (Electronic) IS - 1090-0233 (Linking) VI - 197 IP - 3 DP - 2013 Sep TI - Assessment of bone marrow infiltration diagnosed by flow cytometry in canine large B cell lymphoma: prognostic significance and proposal of a cut-off value. PG - 776-81 LID - S1090-0233(13)00215-3 [pii] LID - 10.1016/j.tvjl.2013.05.003 [doi] AB - The aims of this study were to assess the prognostic significance of bone marrow (BM) infiltration in canine large B cell lymphoma (LBCL) and to establish cut-off values for designating the BM as infiltrated by lymphoid blasts. The degree of BM infiltration by large CD21 positive cells in dogs with LBCL was assessed by flow cytometry (FC) and related to time to progression (TTP) and lymphoma-specific survival (LSS). Forty-six dogs were prospectively enrolled, staged and treated with a dose-intense chemotherapeutic protocol. BM infiltration was directly correlated with peripheral blood infiltration (P=0.001), high lactate dehydrogenase activity (P=0.0024) and substage b disease (P<0.001). In the univariate analysis, there was a significant association between BM infiltration diagnosed by FC and both TTP (P=0.001) and LSS (P<0.001). Substage was the only factor associated with TTP in the multivariate analysis (P=0.002), whereas substage (P<0.001) and anaemia (P=0.008) were associated with LSS. A cut-off of 3% BM infiltration had the strongest prognostic value, since it discriminated between dogs with a poorer prognosis (median TTP 69 days; median LSS 155 days) and dogs with a better prognosis (median TTP 149 days; median LSS 322 days). BM analysis is an essential step in the staging of LBCL. The presence of BM infiltration by FC at diagnosis is a negative prognostic indicator in canine LBCL. CI - Copyright (c) 2013 Elsevier Ltd. All rights reserved. FAU - Marconato, Laura AU - Marconato L AD - Centro Oncologico Veterinario, via San Lorenzo 1-4, 40037 Sasso Marconi, BO, Italy. Electronic address: lauramarconato@yahoo.it. FAU - Martini, Valeria AU - Martini V FAU - Aresu, Luca AU - Aresu L FAU - Sampaolo, Michele AU - Sampaolo M FAU - Valentini, Fabio AU - Valentini F FAU - Rinaldi, Valentina AU - Rinaldi V FAU - Comazzi, Stefano AU - Comazzi S LA - eng PT - Journal Article DEP - 20130602 PL - England TA - Vet J JT - Veterinary journal (London, England : 1997) JID - 9706281 SB - IM MH - Animals MH - Bone Marrow Diseases/pathology/*veterinary MH - Dog Diseases/diagnosis/*pathology MH - Dogs MH - Female MH - Flow Cytometry/*veterinary MH - Lymphoma, B-Cell/pathology/*veterinary MH - Male MH - Prognosis OTO - NOTNLM OT - Bone marrow OT - Canine OT - Flow cytometry OT - Large B cell lymphoma OT - Prognosis EDAT- 2013/06/06 06:00 MHDA- 2014/06/03 06:00 CRDT- 2013/06/06 06:00 PHST- 2012/12/03 00:00 [received] PHST- 2013/04/29 00:00 [revised] PHST- 2013/05/02 00:00 [accepted] PHST- 2013/06/06 06:00 [entrez] PHST- 2013/06/06 06:00 [pubmed] PHST- 2014/06/03 06:00 [medline] AID - S1090-0233(13)00215-3 [pii] AID - 10.1016/j.tvjl.2013.05.003 [doi] PST - ppublish SO - Vet J. 2013 Sep;197(3):776-81. doi: 10.1016/j.tvjl.2013.05.003. Epub 2013 Jun 2.