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Related Experiment Videos

Fossa navicularis: anatomic variation at the skull base.

F Cankal1, H C Ugur, I Tekdemir

  • 1Department of Anatomy, Ankara University Medical School, Ankara, Turkey.

Clinical Anatomy (New York, N.Y.)
|February 20, 2004
PubMed
Summary

The fossa navicularis, a rare skull base variation, occurs in 5.3% of skulls and 3.0% of patients. Identifying this anatomical feature aids radiologists and surgeons by preventing misinterpretation of skull base imaging.

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Area of Science:

  • Anatomy
  • Radiology
  • Skull Base Morphology

Background:

  • The fossa navicularis is an uncommon anatomical variation at the skull base.
  • Radiological misinterpretation of this structure can lead to unnecessary investigations.

Purpose of the Study:

  • To describe the appearance and incidence of the fossa navicularis.
  • To investigate potential associations between the fossa navicularis and basiocciput pathology.
  • To provide detailed anatomical measurements of the fossa navicularis.

Main Methods:

  • Examination of 492 dry human skulls.
  • Analysis of 525 patient CT scans.
  • CT and MRI investigations of skulls and patients with fossa navicularis.
  • Anatomical measurements relative to skull base landmarks.

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Main Results:

  • Fossa navicularis identified in 5.3% of dry skulls (26/492) and 3.0% of patients (16/525).
  • Depth variations noted in skulls: 12 <2 mm, 14 >=2 mm.
  • MRI evaluations revealed no soft tissue lesions in affected patients.

Conclusions:

  • The fossa navicularis is a verifiable anatomical variation with a notable incidence.
  • Awareness of this variation is crucial for accurate radiological interpretation.
  • Detailed anatomical data provided may assist clinicians and researchers in skull base studies.