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Chatterjee G, Sriram H, Ghogale S, Deshpande N, Khanka T, Girase K, Verma S, Arolkar G, Dasgupta N, Narula G, Shetty D, Dhamne C, Moulik NR, Rajpal S, Patkar NV, Banavali S, Gujral S, Subramanian PG, Tembhare PR. Mimics and artefacts of measurable residual disease in a highly sensitive multicolour flow cytometry assay for B-lymphoblastic leukaemia/lymphoma: critical consideration for analysis of measurable residual disease. Br J Haematol 2021; 196:374-379. [PMID: 34476808 DOI: 10.1111/bjh.17801] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Accepted: 08/13/2021] [Indexed: 01/08/2023]
Abstract
High-sensitivity multicolour flow cytometry (MFC)-based B-lymphoblastic leukaemia (B-ALL) measurable residual disease (BMRD) assay is increasingly being used in clinical practice. Herein, we describe six consistently present low-level populations immunophenotypically mimicking abnormal B-ALL blasts in 441 BMRD samples from 301 children. These included CD19+ CD123+ plasmacytoid dendritic cells differentiating from lymphoid precursors, CD10+ transitional B cells with CD10+ /CD38dim-to-negative/CD20bright/CD45bright phenotype, CD19+ natural killer (NK) cells, CD73bright/CD10+ mesenchymal stromal/stem cells, CD73bright/CD34+ endothelial cells, and a CD34+ CD38dim-to-negative/CD10- /CD20bright/CD45bright subset of mature B cells. We provide the proportions, comprehensive immunophenotype, and practical clues for proper identification of these low-level populations. Knowledge regarding the presence and immunophenotype of these mimics is essential for accurate interpretation in high-sensitivity MFC-BMRD analysis.
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Affiliation(s)
- Gaurav Chatterjee
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Harshini Sriram
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Sitaram Ghogale
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Nilesh Deshpande
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Twinkle Khanka
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Karishma Girase
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Shefali Verma
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Gauri Arolkar
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Niharika Dasgupta
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Gaurav Narula
- Department of Pediatric Oncology, Tata Memorial Hospital, Tata Memorial Centre, HBNI University, Mumbai, India
| | - Dhanalaxmi Shetty
- Department of Cancer Cytogenetics, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Chetan Dhamne
- Department of Pediatric Oncology, Tata Memorial Hospital, Tata Memorial Centre, HBNI University, Mumbai, India
| | - Nirmalya R Moulik
- Department of Pediatric Oncology, Tata Memorial Hospital, Tata Memorial Centre, HBNI University, Mumbai, India
| | - Sweta Rajpal
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Nikhil V Patkar
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Shripad Banavali
- Department of Pediatric Oncology, Tata Memorial Hospital, Tata Memorial Centre, HBNI University, Mumbai, India
| | - Sumeet Gujral
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Papagudi G Subramanian
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
| | - Prashant R Tembhare
- Haematopathology Laboratory, ACTREC, Tata Memorial Centre, HBNI University, Navi Mumbai, India
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