Feasibility of flow cytometric analysis of restricted light chain in endoscopic biopsy specimens from patients with gastrointestinal tract B cell lymphoma: a pilot study

• Main Authors: Katsunori Matsueda, Masaya Iwamuro, Takahide Takahashi, Sizuma Omote, Kenji Nishida, Takehiro Tanaka, Daisuke Ennishi, Fumio Otsuka, Tadashi Yoshino, Hiroyuki Okada
• Format: Article
• Language: English
• Published: BMC 2019-09-01
• Series: BMC Research Notes
• Subjects: Flow cytometric analysis; Endoscopic biopsy specimens; Gastrointestinal tract B-cell lymphoma; Restricted light chain; Light chain expression
• Online Access: http://link.springer.com/article/10.1186/s13104-019-4578-4

Abstract Objective Gastrointestinal tract lymphomas are currently detected more frequently due to advances in endoscopic technology. The aim of this study was to assess the feasibility of flow cytometric analysis of restricted light chain in endoscopic biopsy specimens for the diagnosis of gastrointestinal tract B-cell lymphoma. We prepared viable cell suspensions from unfixed specimens obtained from 10 consecutive patients who had a previous histological diagnosis of gastrointestinal tract B-cell lymphoma. We performed immunophenotypic studies with multi-color flow cytometry and assessed clonality through examination of immunoglobulin light chain expression exclusively in a population identified by anti-CD45 or CD20 antibodies. Results We could perform light chain expression analysis with 2 endoscopic biopsy specimens from all 10 patients with gastrointestinal tract B-cell lymphoma. We conclude that flow cytometric analysis of endoscopic biopsy specimens is feasible and thus likely useful for the diagnosis of gastrointestinal tract B-cell lymphoma in clinical settings. Trial registration UMIN Clinical Trials Registry, UMIN000027730. Registered 12 June 2017