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Related Experiment Video

Updated: Jul 16, 2026

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Measuring 3D In-vivo Shoulder Kinematics using Biplanar Videoradiography

Published on: March 12, 2021

Empty glenoid fossa sign.

Kevin J Penna¹, Richard M Mirra, Francis J Cusumano

¹Department of Oral & Maxillofacial Surgery at Nassau University Medical Center, East Meadow, NY, USA.

The New York State Dental Journal

|March 24, 2007

Summary

An "empty glenoid fossa" sign on CT scans suggests a condylar neck fracture. This finding is crucial for diagnosing head injuries affecting the cranial base.

Area of Science:

Radiology
Trauma Imaging
Anatomy

Background:

Computed tomography (CT) is essential for evaluating closed head injuries.
Anatomical structures at the cranial base, including the glenoid fossa, are visualized in routine CT scans.
The glenoid fossa, part of the temporomandibular joint, articulates with the condyle.

Purpose of the Study:

To highlight the significance of the
empty glenoid fossa
sign in diagnosing condylar neck fractures.
To emphasize the role of cranial base imaging in trauma assessment.

Main Methods:

Review of routine CT studies performed for suspected closed head injury.
Identification and analysis of the glenoid fossa and its associated condyle.

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Correlation of imaging findings with potential diagnoses.

Main Results:

The
empty glenoid fossa
sign, characterized by the absence of the condyle within the glenoid fossa, was observed.
This sign is indicative of a fracture of the condylar neck.

Conclusions:

The
empty glenoid fossa
sign is a valuable indicator of condylar neck fractures on CT scans.
Radiologists should be aware of this sign during the evaluation of head trauma, particularly when examining the cranial base.