Familial Multiple Coagulation Factor Deficiencies (FMCFDs) in a Large Cohort of Patients-A Single-Center Experience

Barbara Preisler1, Behnaz Pezeshkpoor1, Atanas Banchev2

  • 1Institute of Experimental Hematology and Transfusion Medicine, University Clinic Bonn, 53127 Bonn, Germany.

Insights

Familial multiple coagulation factor deficiencies (FMCFDs) are rare inherited bleeding disorders. Genetic analysis revealed diverse causes, including co-inheritance of deficiencies and single-gene defects, highlighting the need for molecular testing to avoid misdiagnosis.

Area of Science:

  • Hematology
  • Genetics
  • Molecular Biology

Background:

  • Familial multiple coagulation factor deficiencies (FMCFDs) are inherited disorders characterized by reduced activity of at least two clotting factors.
  • These conditions lead to variable bleeding or thrombotic symptoms, complicating patient management.
  • Identifying the genetic basis of FMCFDs is crucial for accurate diagnosis and treatment.

Purpose of the Study:

  • To identify the underlying genetic defects in patients diagnosed with familial multiple coagulation factor deficiencies.
  • To characterize the genetic landscape of FMCFDs in a large patient cohort.

Main Methods:

  • Collected activity levels from a large cohort of laboratory-diagnosed FMCFD patients.
  • Performed next-generation sequencing for genetic analysis.

Main Results:

  • Identified 52 FMCFDs arising from co-inheritance of single-factor deficiencies, involving various clotting factors with Factor VII (FVII) deficiency being most prevalent.
  • Discovered 21 FMCFDs due to single-gene defects, including combined Factor V/Factor VIII (FV/FVIII) deficiency and vitamin K-dependent coagulation factor deficiency.
  • Identified nine patients with combined FVII and Factor X (FX) deficiency caused by a partial deletion on chromosome 13.

Conclusions:

  • FMCFDs are rare, heritable hemostasis abnormalities classified as orphan diseases.
  • Comprehensive screening of residual clotting factor activities combined with molecular genetic analysis is essential to prevent under- and misdiagnosis.
  • Accurate genetic diagnosis is key for effective management of these rare bleeding disorders.
Abstract

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