PMID- 32458505 OWN - NLM STAT- MEDLINE DCOM- 20210329 LR - 20210329 IS - 1939-165X (Electronic) IS - 0275-6382 (Linking) VI - 49 IP - 2 DP - 2020 Jun TI - Spurious, marked leukocytosis in 2 cats with Heinz body hemolytic anemia. PG - 232-239 LID - 10.1111/vcp.12860 [doi] AB - Two domestic shorthair cats were presented with anorexia and dehydration following ingestion of caramelized onions. Shared key findings from a CBC (ADVIA 2120), serum biochemistry, and urinalysis included a spurious, marked leukocytosis with discordant basophil (BASO) channel and peroxidase channel WBC counts, normal manual leukocyte counts, mild, non-regenerative anemia with discrepancies between automated and manual reticulocyte counts, an abundance of large Heinz bodies (HBs), and highly irregular scattergrams. Case 1 also demonstrated a markedly elevated mean corpuscular hemoglobin concentration (MCHC) and discrepancies between RBC hemoglobin indices. Spurious leukocyte results were confirmed through re-analysis of samples (including the acquisition of a new sample, use of an alternate analyzer (Sysmex XT-2000iV; Case 1 only), and evaluation of scattergrams and blood films (Cases 1 and 2). Repeatedly discrepant reticulocyte counts were also identified. In both cases, the erroneous BASO WBC counts, discrepancies in reticulocyte counts and RBC indices, and atypical scattergrams were interpreted to result from various effects of the HBs. These cases emphasize the importance of reviewing blood films, interpreting scattergrams, and the usefulness of duplicate methods for determining various measurands on hematology analyzers. CI - (c) 2020 American Society for Veterinary Clinical Pathology. FAU - Johnson, Courtney E AU - Johnson CE AUID- ORCID: 0000-0001-7534-4981 AD - Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA. FAU - Seelig, Davis M AU - Seelig DM AD - Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA. FAU - Moore, Frances M AU - Moore FM AD - Veterinary Services, Marshfield Labs, Marshfield, WI, USA. FAU - Ruska, Tammy J AU - Ruska TJ AD - Veterinary Medical Center, University of Minnesota, St. Paul, MN, USA. FAU - Heinrich, Daniel A AU - Heinrich DA AD - Department of Veterinary Clinical Sciences, College of Veterinary Medicine, University of Minnesota, St. Paul, MN, USA. LA - eng PT - Case Reports DEP - 20200526 PL - United States TA - Vet Clin Pathol JT - Veterinary clinical pathology JID - 9880575 SB - IM MH - Anemia, Hemolytic/blood/diagnosis/pathology/*veterinary MH - Animals MH - Basophils/pathology MH - Cat Diseases/blood/*diagnosis/pathology MH - Cats MH - Female MH - Heinz Bodies/pathology MH - Hematology/instrumentation MH - Hemolysis MH - Leukocyte Count/veterinary MH - Leukocytosis/blood/diagnosis/pathology/*veterinary MH - Male MH - Oxidative Stress MH - Reticulocyte Count/veterinary MH - Urinalysis/veterinary OTO - NOTNLM OT - ADVIA OT - Sysmex OT - feline OT - hemolysis OT - oxidative damage EDAT- 2020/05/28 06:00 MHDA- 2021/03/30 06:00 CRDT- 2020/05/28 06:00 PHST- 2019/08/23 00:00 [received] PHST- 2019/10/18 00:00 [revised] PHST- 2019/10/21 00:00 [accepted] PHST- 2020/05/28 06:00 [pubmed] PHST- 2021/03/30 06:00 [medline] PHST- 2020/05/28 06:00 [entrez] AID - 10.1111/vcp.12860 [doi] PST - ppublish SO - Vet Clin Pathol. 2020 Jun;49(2):232-239. doi: 10.1111/vcp.12860. Epub 2020 May 26.