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Front Med (Lausanne). 2021 Aug 06;8:705382. doi: 10.3389/fmed.2021.705382. eCollection 2021.

The Crucial Questions on Synovial Biopsy: When, Why, Who, What, Where, and How?.

Frontiers in medicine

Francesca Ingegnoli, Lavinia Agra Coletto, Isabella Scotti, Riccardo Compagnoni, Pietro Simone Randelli, Roberto Caporali

Affiliations

  1. Division of Clinical Rheumatology, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.
  2. Department of Clinical Sciences & Community Health, Research Center for Adult and Pediatric Rheumatic Diseases, Research Center for Environmental Health, Università degli Studi di Milano, Milano, Italy.
  3. 1° Clinica Ortopedica, ASST Centro Specialistico Ortopedico Traumatologico Gaetano Pini-CTO, Milano, Italy.
  4. Department of Biomedical, Surgical and Dental Sciences, Università degli Studi di Milano, Milano, Italy.
  5. Laboratory of Applied Biomechanics, Department of Biomedical Sciences for Health, Università degli Studi di Milano, Milano, Italy.

PMID: 34422862 PMCID: PMC8377390 DOI: 10.3389/fmed.2021.705382

Abstract

In the majority of joint diseases, changes in the organization of the synovial architecture appear early. Synovial tissue analysis might provide useful information for the diagnosis, especially in atypical and rare joint disorders, and might have a value in case of undifferentiated inflammatory arthritis, by improving disease classification. After patient selection, it is crucial to address the dialogue between the clinician and the pathologist for adequately handling the sample, allowing identifying histological patterns depending on the clinical suspicion. Moreover, synovial tissue analysis gives insight into disease progression helping patient stratification, by working as an actionable and mechanistic biomarker. Finally, it contributes to an understanding of joint disease pathogenesis holding promise for identifying new synovial biomarkers and developing new therapeutic strategies. All of the indications mentioned above are not so far from being investigated in everyday clinical practice in tertiary referral hospitals, thanks to the great feasibility and safety of old and more recent techniques such as ultrasound-guided needle biopsy and needle arthroscopy. Thus, even in rheumatology clinical practice, pathobiology might be a key component in the management and treatment decision-making process. This review aims to examine some essential and crucial points regarding why, when, where, and how to perform a synovial biopsy in clinical practice and research settings and what information you might expect after a proper patient selection.

Copyright © 2021 Ingegnoli, Coletto, Scotti, Compagnoni, Randelli and Caporali.

Keywords: inflammatory arthritis; rheumatoid arthritis; synovial analysis; synovial biopsy; synovial membrane

Conflict of interest statement

The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

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