Rapid laboratory identification of fibrinogen Longmont: a case report and literature review - Summary - MDSpire

Rapid laboratory identification of fibrinogen Longmont: a case report and literature review

  • By

  • Cuihua Ma

  • Xuezhuo Li

  • Da Yin

  • Huidong Ma

  • Wenran Lu

  • Chunhua Wang

  • June 22, 2026

  • 0 min

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Objective:

To explore the laboratory diagnostic characteristics and differential diagnostic approaches for fibrinogen Longmont, providing a reference for accurate interpretation of coagulation reports.

Approach:
    Key Findings:
    • Optical FIB assays yielded falsely low results (<0.35 g/L) while magnetic bead assays provided normal results (4.18 g/L).
    • Fibrinogen Longmont was confirmed as the diagnosis, characterized by a genetic mutation affecting clot formation.
    Interpretation:

    The study highlights the importance of using multiple testing methodologies to avoid misdiagnosis of fibrinogen abnormalities.

    Limitations:
    • The case study is based on a single patient, which may limit the generalizability of findings.
    • Variability in laboratory methods and reagents may affect the reliability of results.
    Conclusion:

    Accurate laboratory diagnosis of fibrinogen abnormalities is crucial.

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