PMID- 34636141 OWN - NLM STAT- MEDLINE DCOM- 20220204 LR - 20220204 IS - 1751-553X (Electronic) IS - 1751-5521 (Linking) VI - 44 IP - 1 DP - 2022 Feb TI - The success rate of interphase fluorescence in situ hybridization in plasma cell disorders can be improved using unconventional sources of plasma cells. PG - 157-162 LID - 10.1111/ijlh.13731 [doi] AB - BACKGROUND: Immunomagnetic cell sorting (IMCS) is a preferred technique for the enrichment of plasma cells (PC) before fluorescence in situ hybridization (FISH). Here, we share our real-world experience regarding the success rate of IMCS, its limitations, and the utility of alternate sources to obtain a successful FISH in various PC disorders. MATERIALS AND METHODS: A retrospective analysis was performed in patients with a PC neoplasm, who underwent bone marrow (BM) examination, and FISH testing over 30 months. In all cases with an unsuccessful IMCS, an attempt was made to identify the cause of failure. RESULTS: Immunomagnetic cell sorting of PCs was successful in 395/450 cases (87.8%; 77/98 cases (78.6%) with <10% PCs and 318/352 (90.3%) with >/=10% PCs in BM aspirate; P = .003). Among cases with unsuccessful IMCS (<10% PCs; n = 21 and >/=10% PCs; n = 34), an alternate source could be used successfully in 34 (62%) patients and includes air-dried trephine biopsy imprint smears (n = 28) with aggregates or sheets of PCs, fine-needle aspiration smears/biopsy from plasmacytoma (n = 5), and ascitic fluid (n = 1). 284/395 (71.9%) patients with successful IMCS and all 34 cases with an alternate source of PCs showed at least one cytogenetic abnormality on four-probe FISH. CONCLUSION: Variations in the sample quality together with significant variation in the number of PCs between BM aspirate and the trephine biopsy imprint smears/biopsy reduce the success rate of IMCS in a real-world scenario and necessitate utilization of patient-specific alternate sources of PCs like a trephine biopsy imprint or cytology smears from extramedullary sources for successful FISH testing in PC neoplasms. CI - (c) 2021 John Wiley & Sons Ltd. FAU - Panakkal, Vandana AU - Panakkal V AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Rana, Sonia AU - Rana S AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Rathore, Shailja AU - Rathore S AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Anshu, Anshu AU - Anshu A AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Balakrishnan, Anand AU - Balakrishnan A AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Singh, Charanpreet AU - Singh C AD - Adult Clinical Hematology and Bone Marrow Transplantation Unit, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Jandial, Aditya AU - Jandial A AD - Adult Clinical Hematology and Bone Marrow Transplantation Unit, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Sachdeva, Man Updesh Singh AU - Sachdeva MUS AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Varma, Neelam AU - Varma N AUID- ORCID: 0000-0002-1170-5976 AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Lad, Deepesh AU - Lad D AD - Adult Clinical Hematology and Bone Marrow Transplantation Unit, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Malhotra, Pankaj AU - Malhotra P AD - Adult Clinical Hematology and Bone Marrow Transplantation Unit, Department of Internal Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India. FAU - Sreedharanunni, Sreejesh AU - Sreedharanunni S AUID- ORCID: 0000-0003-2626-4154 AD - Department of Hematology, Post Graduate Institute of Medical Education and Research, Chandigarh, India. LA - eng GR - 71/2-EDU-16/657/Postgraduate Institute of Medical Education and Research, Chandigarh/ PT - Journal Article DEP - 20211011 PL - England TA - Int J Lab Hematol JT - International journal of laboratory hematology JID - 101300213 RN - 0 (Biomarkers, Tumor) SB - IM MH - Adult MH - Aged MH - Aged, 80 and over MH - Biomarkers, Tumor MH - Bone Marrow/pathology MH - Chromosome Aberrations MH - Cytological Techniques MH - Diagnosis, Differential MH - Disease Management MH - Disease Susceptibility MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence/*methods/standards MH - Interphase/*genetics MH - Male MH - Middle Aged MH - Neoplasm Grading MH - Neoplasm Staging MH - Neoplasms, Plasma Cell/*diagnosis/*genetics MH - Plasma Cells/*metabolism/*pathology MH - Retrospective Studies OTO - NOTNLM OT - bone marrow biopsy imprints OT - cytogenetics OT - fine-needle aspiration cytology OT - immunomagnetic cell sorting OT - multiple myeloma OT - plasma cell enrichment EDAT- 2021/10/13 06:00 MHDA- 2022/02/05 06:00 CRDT- 2021/10/12 07:01 PHST- 2021/08/28 00:00 [revised] PHST- 2021/06/15 00:00 [received] PHST- 2021/09/28 00:00 [accepted] PHST- 2021/10/13 06:00 [pubmed] PHST- 2022/02/05 06:00 [medline] PHST- 2021/10/12 07:01 [entrez] AID - 10.1111/ijlh.13731 [doi] PST - ppublish SO - Int J Lab Hematol. 2022 Feb;44(1):157-162. doi: 10.1111/ijlh.13731. Epub 2021 Oct 11.