1
|
Zelmer KLC, Moritz A, Bauer N. Evaluation of canine and feline leukocyte differential counts obtained with the scil vCell 5 compared to the Advia 2120 hematology analyzer and a manual method. J Vet Diagn Invest 2023; 35:679-697. [PMID: 37612877 PMCID: PMC10621549 DOI: 10.1177/10406387231187899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/25/2023] Open
Abstract
The vCell 5 (scil Animal Care), a point-of-care hematology analyzer (POCA), was recently introduced to veterinary laboratories. This laser- and impedance-based analyzer is capable of providing a CBC with 5-part WBC differential count (Diff) along with WBC cytograms and flags serving as interpretation aids for numerical results. We compared the scil POCA-Diff to reference methods (i.e., manual differential count, Advia 2120 hematology analyzer [Siemens]) for canine and feline blood samples and considered WBC cytograms and flags. Total observed error (TEo), calculated from CV and bias%, was compared to total allowable error (TEa). Data were analyzed before and after a review process (exclusion of flagged and samples with invalid cytograms). For both species, correlation was good-to-excellent (rs = 0.81-0.97) between both analyzers for all variables, except for feline monocytes (rs = 0.21-0.63) and canine monocyte% (rs = 0.50). Smallest biases were seen for neutrophils (dog: -5.7 to 0.8%; cat: 1.5-9.4%) with both reference methods. Quality requirements (TEo < TEa) were fulfilled for canine and feline neutrophils (TEo = 5.3-10.6%, TEa = 15%) and eosinophils (TEo = 67.1-83%, TEa = (90)-50%) considering at least one reference method. Our review process led to mildly higher rs-values for most variables. Although not completely satisfactory, the scil POCA provides reliable results in compliance with ASVCP quality goals for canine and feline neutrophils and eosinophils. Analyzer flag and cytogram analysis served as useful tools for QA, indicating the necessity for manual review of blood smears, and contributed to improvement of scil POCA performance.
Collapse
Affiliation(s)
| | - Andreas Moritz
- Small Animal Clinic, Internal Medicine, Justus-Liebig-University, Giessen, Germany
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
| | - Natali Bauer
- Department of Veterinary Clinical Sciences, Clinical Pathology and Clinical Pathophysiology, Justus-Liebig-University, Giessen, Germany
| |
Collapse
|
3
|
Marconato L, Comazzi S, Aresu L, Riondato F, Stefanello D, Ferrari R, Martini V. Prognostic significance of peripheral blood and bone marrow infiltration in newly-diagnosed canine nodal marginal zone lymphoma. Vet J 2019; 246:78-84. [PMID: 30902194 DOI: 10.1016/j.tvjl.2019.02.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2018] [Revised: 01/31/2019] [Accepted: 02/04/2019] [Indexed: 01/17/2023]
Abstract
Canine nodal marginal zone lymphoma (nMZL) is infrequent and is typically diagnosed at an advanced disease stage. However, it is currently unknown whether different levels of peripheral blood (PB) and bone marrow (BM) infiltration may provide prognostic stratification in dogs with nMZL. The aims of the present prospective study were to assess the influence of PB and BM infiltration detected by flow cytometry (FC) on time to progression (TTP) and lymphoma-specific survival (LSS) in dogs with newly-diagnosed multicentric nMZL, and to establish a cut-off value of prognostic significance. Forty-five completely staged and treatment-naïf dogs with histologically-confirmed nMZL were enrolled. After staging, dogs received chemo-immunotherapy or chemotherapy. PB infiltration was significantly associated with TTP (p=0.001): dogs with PB infiltration <30% had a median TTP of 186 days, whereas dogs with PB infiltration ≥30% had a median TTP of 43 days. Additionally, vaccinated dogs had a significantly (p=0.012) longer TTP (399 days) compared with dogs receiving chemotherapy only (211 days). BM infiltration was significantly associated with LSS (p<0.001): dogs with BM infiltration <1% had a median LSS of 1403 days, those with BM infiltration 1-20% of 337 days, and those with BM infiltration ≥20% of 188 days. Normal LDH levels and the administration of chemo-immunotherapy also significantly improved LSS (560 vs 211 days, and 399 vs 211 days, respectively; p<0.001). PB and BM flow cytometric evaluation is an integral part of staging work-up in dogs with nMZL and has prognostic relevance.
Collapse
Affiliation(s)
- Laura Marconato
- Centro Oncologico Veterinario, via San Lorenzo 1-4, 40037, Sasso Marconi, BO, Italy.
| | - Stefano Comazzi
- Department of Veterinary Medicine, University of Milan, Via Celoria 10, 20133, Milan, Italy
| | - Luca Aresu
- Department of Veterinary Sciences, University of Turin, Largo P. Braccini 2, 10095, Grugliasco, Turin, Italy
| | - Fulvio Riondato
- Department of Veterinary Sciences, University of Turin, Largo P. Braccini 2, 10095, Grugliasco, Turin, Italy
| | - Damiano Stefanello
- Department of Veterinary Medicine, University of Milan, Via Celoria 10, 20133, Milan, Italy
| | - Roberta Ferrari
- Department of Veterinary Medicine, University of Milan, Via Celoria 10, 20133, Milan, Italy
| | - Valeria Martini
- Department of Veterinary Medicine, University of Milan, Via Celoria 10, 20133, Milan, Italy
| |
Collapse
|
5
|
Martini V, Melega M, Riondato F, Marconato L, Cozzi M, Bernardi S, Comazzi S, Aresu L. A retrospective study of flow cytometric characterization of suspected extranodal lymphomas in dogs. J Vet Diagn Invest 2018; 30:830-836. [PMID: 30264662 DOI: 10.1177/1040638718804301] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Flow cytometry (FC) is widely applied to characterize and stage nodal lymphomas in dogs because it has a short turnaround time, requires minimally invasive sampling, and allows contemporary evaluation of neoplastic cells in the primary lesion and of blood and marrow involvement. We investigated advantages and limitations of FC in suspected extranodal lymphomas in dogs. The likelihood of obtaining a suitable FC sample was significantly lower for aspirates of extranodal lesions than for lymph node aspirates. However, we noted no differences among different extranodal lesion sites. We also describe FC results for 39 samples compatible with extranodal lymphoma. A dominant population of large cells was easily identified on morphologic FC scattergrams in many cases. Phenotypic aberrancies were frequently present, mainly in T-cell lymphomas. Lymphoma cells were distinguishable from normal residual lymphocytes in >85% of cases, facilitating the quantification of putative blood and marrow involvement by FC. Despite the high percentage of non-diagnostic samples (32 of 73, >40%), we support the inclusion of FC in the diagnostic workup of suspected extranodal lymphomas in dogs, in conjunction with histopathology. Histopathology is the gold standard for diagnosing lymphoma, provides relevant information, including tissue invasion and epitheliotropism, but has a longer turnaround time.
Collapse
Affiliation(s)
- Valeria Martini
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Maverick Melega
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Fulvio Riondato
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Laura Marconato
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Marzia Cozzi
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Serena Bernardi
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Stefano Comazzi
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| | - Luca Aresu
- Department of Veterinary Medicine, University of Milan, Milan, Italy (Martini, Cozzi, Bernardi, Comazzi).,Department of Veterinary Sciences, University of Turin, Grugliasco, Turin, Italy (Melega, Riondato, Aresu).,Centro Oncologico Veterinario, Sasso Marconi, Bologna, Italy (Marconato)
| |
Collapse
|