RT Journal Article SR Electronic T1 Microsatellite instability evaluation of patients with solid tumour: routine practice insight from a large series of Italian referral centre JF Journal of Clinical Pathology JO J Clin Pathol FD BMJ Publishing Group Ltd and Association of Clinical Pathologists SP jclinpath-2022-208203 DO 10.1136/jclinpath-2022-208203 A1 Russo, Gianluca A1 Pepe, Francesco A1 Pisapia, Pasquale A1 Palumbo, Lucia A1 Nacchio, Mariantonia A1 Vigliar, Elena A1 Pallante, Pierlorenzo A1 Parente, Paola A1 Fassan, Matteo A1 Graziano, Paolo A1 Bellevicine, Claudio A1 Troncone, Giancarlo A1 Malapelle, Umberto A1 Iaccarino, Antonino YR 2022 UL http://jcp.bmj.com/content/early/2022/05/11/jclinpath-2022-208203.abstract AB DNA mismatch repair complex is involved in the maintenance of DNA stability. In the recent years, a plethora of technical approaches for microsatellite instability (MSI) analysis emerged. Here, we review the results of our MSI status evaluation by adopting a customised workflow on microfluidic system obtained in 4 years of diagnostic routine practice. Data from MSI status were retrieved from our institutional archive covering the period from January 2017 to December 2021. Microfluidic analysis was carried out on microfluidic platform. Results were inspected with a proprietary software. Overall, microsatellite stability (MSS) and MSI-high (MSI-H) profile was detected in n=423/458 (92.36%) and n=35/458 (7.64%) patients with metastatic CRC (mCRC), respectively. In addition, n=78/86 (90.70%) and n=8/86 (9.30%) patients without CRC showed an MSS and MSI-H profile. This review highlights the suitability of microfluidic approach in patients with cancer for MSI testing.