Segmental Spinal Dysgenesis-"Redefined"

Area of Science:

• Pediatric Radiology
• Developmental Biology
• Spinal Cord Malformations

Background:

• Segmental spinal dysgenesis (SSD) is a complex spinal anomaly characterized by malformation or absence of a vertebral segment.
• Defined by varying degrees of notochordal malformation, it presents as a spectrum from hypoplasia to complete absence of spinal cord segments.

Purpose of the Study:

• To examine and reassess imaging findings of segmental spinal dysgenesis (SSD).
• To correlate observed imaging features of SSD with potential embryological explanations.
• To enhance understanding of this complex pediatric spinal anomaly.

Main Methods:

• Retrospective observational study involving fifteen children with clinical and imaging features consistent with SSD.
• Magnetic resonance imaging (MRI) was utilized following institutional spine protocols for detailed assessment.

Main Results:

• Three distinct imaging patterns of SSD were identified in the pediatric cohort.
• These patterns included absent caudal segments, segmental dysgenesis with low-lying cords, and segmental caudal dysgenesis with severe spinal deformities.

Conclusions:

• SSD is a complex pediatric spinal anomaly requiring thorough clinical-radiological evaluation.
• Multidisciplinary management is essential, guided by the severity and type of SSD identified via MRI.
• MRI is critical for accurate diagnosis, classification, and surgical planning in SSD.