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Accessory ossification centres at the thoracolumbar junction.

K P Singer¹, P D Breidahl

¹Department of Anatomy and Human Biology, University of Western Australia, Nedlands.

Surgical and Radiologic Anatomy : SRA

|January 1, 1990

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Accessory ossification centers and vestigial ribs are common at the thoracolumbar junction. These findings can mimic fractures, requiring careful radiographic evaluation for accurate diagnosis.

Area of Science:

Radiology
Anatomy
Orthopedics

Background:

The thoracolumbar junction is a common site for anatomical variations.
Accessory ossification centers and vestigial ribs can occur in this region.
Distinguishing these variants from fractures is crucial for clinical management.

Purpose of the Study:

To survey the prevalence of accessory ossification centers and vestigial ribs at the thoracolumbar junction.
To compare radiographic and histologic features of accessory ossification centers.
To highlight the clinical significance of these findings in differential diagnosis.

Main Methods:

Retrospective review of 810 thoracolumbar junction CT scans.
Identification and characterization of accessory ossification centers and vestigial ribs.

Related Experiment Videos

Comparison of radiographic findings with cadaveric histologic data.

Main Results:

Several forms of accessory ossification centers and vestigial ribs were identified.
Four short T12 ribs and 15 L1 ribs were observed.
Eight accessory ossification centers at L1 and 3 at T12 were documented.

Conclusions:

Accessory ossification centers and vestigial ribs are relatively common at the thoracolumbar junction.
These anatomical variations can be mistaken for fractures.
Careful assessment of cortical margins on CT scans is essential for differentiating these entities from acute fractures.