Staging and monitoring of pediatric acute lymphoblastic leukemia (ALL) includes examination of the cerebrospinal fluid (CSF). At our institution, we noted an increased incidence of low-level leukemic blasts in CSF samples from patients with ALL. This increase coincided with a conversion from the Shandon CytoSpin 4 (Thermo Fisher Scientific, Waltham, MA) to the Wescor Cytopro Rotor AC-060 (Wescor, Logan, UT). This study directly compared these 2 machines using patient samples and known concentrations of cultured leukemia cells. With patient samples, the Wescor Cytopro led to a 5- to 9-fold increase in the number of cells on a slide compared with the Shandon CytoSpin; furthermore, leukemic blasts were detected only with the Wescor Cytopro in 2 cases. Similar findings were observed using cultured leukemia cells. Thus, the detection of blasts in CSF is highly instrument-dependent. The newer, more sensitive cytocentrifuge machines identify blasts that were previously missed by older machines, but the clinical significance remains under investigation.
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http://dx.doi.org/10.1309/AJCPP4HQ2FXQEZIL | DOI Listing |
Pediatr Blood Cancer
January 2019
Department of Pediatrics, Division of Oncology, Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.
Background: At diagnosis, there are prognostic implications of low-level leukemic blasts (CNS 2) in the cerebrospinal fluid (CSF) of patients with acute lymphoblastic leukemia (ALL). However, the significance of post-induction CNS 2 results and the impact of equipment on CNS 2 prevalence have not been well studied.
Procedure: A single-institution retrospective cohort study was conducted to analyze the outcome of patients with ≥1 post-induction CNS 2.
Am J Clin Pathol
May 2012
Department of Pathology, The Children’s Hospital of Philadelphia, PA, USA.
The patented Cytopro system design makes significant advances in the convenience and reliability of cytocentrifugation. The chamber and pad are designed to facilitate prewetting and to better control fluid flow rates. The sealed rotor is durable, convenient, and reliable with significant patented features impacting sample quality and convenience of operation.
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