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Accessory navicular bone: not such a normal variant.

A Bernaerts1, F M Vanhoenacker, S Van de Perre

  • 1Department of Radiology, Universitair Ziekenhuis Antwerpen (University of Antwerp), Edegem, Belgium.

JBR-BTR : Organe De La Societe Royale Belge De Radiologie (SRBR) = Orgaan Van De Koninklijke Belgische Vereniging Voor Radiologie (KBVR)
|December 14, 2004
PubMed
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Accessory navicular bones are often misidentified as normal variants. However, types 2 and 3 can indicate serious conditions like posterior tibial tendon tears, requiring careful radiologic assessment.

Area of Science:

  • Orthopedics
  • Radiology
  • Anatomy

Background:

  • Accessory navicular bones are frequently misdiagnosed as benign anatomic variants.
  • Three distinct types of accessory navicular bones have been identified.

Purpose of the Study:

  • To differentiate between normal accessory navicular variants and those associated with pathology.
  • To highlight the clinical significance of type 2 and 3 accessory navicular bones.

Main Methods:

  • Review of radiologic findings associated with accessory navicular bones.
  • Discussion of the pathogenesis of different accessory navicular types.
  • Illustration of key radiologic features.

Main Results:

  • Type 2 and 3 accessory navicular bones are linked to pathological conditions.

Related Experiment Videos

  • These conditions include posterior tibial tendon tears and painful navicular syndrome.
  • Symptomatic patients with these variants require thorough evaluation.

    • Conclusions:

    • Accessory navicular bones, particularly types 2 and 3, should not be dismissed as simple roentgenologic variants in symptomatic individuals.
    • Accurate radiologic interpretation is crucial for diagnosing associated pathologies.
    • Understanding the pathogenesis aids in clinical management.