Tag: posterior arch defect
Spina Bifida Occulta at S1 Level: X-ray Radiographic Features and Clinical Implications
The radiographic image demonstrates a classic presentation of spina bifida occulta affecting the first sacral vertebra (S1), highlighted by the red circle. This congenital anomaly results from a failure in the normal embryological development of the neural tube, specifically inadequate formation of the vertebral arch components.
Unfused Posterior Arch of Atlas (C1): Radiological Features and Clinical Significance
The CT scan image displays an axial view of the first cervical vertebra (C1), also known as the atlas, with a notable unfused posterior arch highlighted by the red arrow. This congenital anomaly represents a failure of proper fusion during embryonic development of the posterior neural arch components.
