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Pulmonary veno-occlusive disease.

David Montani1, Edmund M Lau2, Peter Dorfmüller3

  • 1Univ Paris-Sud, Faculté de Médecine, Université Paris-Saclay, Le Kremlin Bicêtre, France AP-HP, Service de Pneumologie, Hôpital Bicêtre, Le Kremlin Bicêtre, France Inserm UMR_S 999, Centre Chirurgical Marie Lannelongue, Le Plessis Robinson, France.

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Pulmonary veno-occlusive disease (PVOD) is a rare condition affecting lung blood vessels. Genetic mutations in EIF2AK4 are a key cause, and early diagnosis is crucial for patient outcomes.

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Area of Science:

  • Cardiology
  • Pulmonology
  • Genetics

Background:

  • Pulmonary veno-occlusive disease (PVOD) is a rare form of pulmonary hypertension (PH) characterized by pulmonary venule remodeling.
  • PVOD and pulmonary capillary hemangiomatosis (PCH) are considered related conditions.
  • Heritable PVOD/PCH is linked to biallelic mutations in the EIF2AK4 gene.

Purpose of the Study:

  • To highlight the significance of EIF2AK4 mutations in PVOD pathogenesis.
  • To emphasize the importance of differentiating PVOD from pulmonary arterial hypertension (PAH).
  • To outline diagnostic approaches and current therapeutic limitations for PVOD.

Main Methods:

  • Review of current literature on PVOD and PCH.
  • Analysis of diagnostic criteria including oxygen parameters, DLCO, and HRCT findings.
  • Discussion of genetic basis and therapeutic strategies.

Main Results:

  • EIF2AK4 mutations are identified as a major cause of heritable PVOD/PCH.
  • PVOD has a worse prognosis than PAH and requires distinct diagnostic and therapeutic considerations.
  • Noninvasive methods can accurately diagnose PVOD, distinguishing it from PAH.

Conclusions:

  • Accurate diagnosis of PVOD is essential due to its distinct pathophysiology and prognosis compared to PAH.
  • EIF2AK4 mutations are a significant factor in the molecular pathogenesis of PVOD/PCH.
  • Currently, lung transplantation is the primary definitive treatment for eligible PVOD patients, as evidence-based medical therapies are lacking.