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[Challenges in diagnosing familial Mediterranean fever: exploring atypical clinical features. Clinical case]

M V Barsuk1, A V Novikov1, T A Mikhalina1

  • 1Sechenov First Moscow State Medical University (Sechenov University).

Terapevticheskii Arkhiv
|August 6, 2024
PubMed

Insights

Familial Mediterranean fever (FMF) cases show unusual symptoms and inheritance patterns, challenging Mendelian genetics. Genetic testing aids diagnosis and treatment but isn't always definitive for these complex FMF presentations.

Area of Science:

  • Genetics
  • Immunology
  • Internal Medicine

Background:

  • Familial Mediterranean fever (FMF) is an autoinflammatory disorder typically inherited in an autosomal recessive pattern.
  • Classical FMF presentations and inheritance follow Gregor Mendel's laws, but atypical cases are increasingly recognized.

Observation:

  • This case series describes three FMF patients with atypical clinical manifestations.
  • These patients also exhibited unusual inheritance patterns that deviate from standard Mendelian genetics.
  • Molecular genetic testing, while valuable, did not provide conclusive diagnoses in all atypical FMF cases.

Findings:

  • Atypical FMF presentations can involve complex genetic mechanisms beyond simple Mendelian inheritance.
  • Genetic testing is crucial for elucidating inflammatory pathways and guiding personalized therapy in complex FMF cases.
  • The phenotypic spectrum of FMF is evolving with the integration of molecular genetic diagnostics.

Implications:

  • These observations highlight the need for a broader understanding of FMF genetics beyond classical inheritance models.
  • Molecular diagnostics are essential for managing patients with atypical FMF, improving treatment selection and patient outcomes.
  • Further research is warranted to fully characterize the genetic and molecular underpinnings of atypical FMF variants.
Keywords:
Behchet's diseaseatypical courseautoinflammation, heterozygous mutationsepilepsyfamilial Mediterranean feverneutrophilic dermatosis

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