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[Unilateral isthmic lysis in x-ray computed tomography]
A Chevrot1, B Rousselin, F Gires
1Service de Radiologie B, Hôpital Cochin, Paris.
Journal De Radiologie
|December 1, 1988
Summary
Dahu's sign, a vertebral hemi-arch hypertrophy, indicates potential contralateral isthmic lysis on CT scans. This finding is the computed tomography equivalent of vertebral anisocorism seen in conventional radiology.
Area of Science:
- Radiology
- Orthopedics
- Anatomy
Background:
- Vertebral anomalies can present subtle signs on imaging.
- Mechanical stress can lead to adaptive bone changes.
Observation:
- Dahu's sign is defined as condensing pediculolaminar hypertrophy.
- This hypertrophy originates from mechanical factors.
Findings:
- Dahu's sign is identified via computed tomography (CT) scan.
- It represents hypertrophy of the vertebral hemi-arch.
- This sign suggests contralateral lysis of the vertebral isthmus.
Implications:
- Dahu's sign serves as a CT equivalent to vertebral anisocorism.
- It aids in diagnosing specific vertebral pathologies.
- Further investigation may be warranted based on its presence.