Related Experiment Video
Updated: May 24, 2026

05:53
Intraoperative Ultrasound in Spinal Surgery
Published on: August 17, 2022
Case report: imaging findings in a "butterfly" vertebra
Cedric Boulet1, Ann Schiettecatte, Johan De Mey
1Department of Radiology, UZ Brussel, Jette, Belgium.
Acta Neurologica Belgica
|February 29, 2012
Summary
A rare butterfly vertebra, a vertebral anomaly, can cause chronic low back pain. This case highlights a sacral butterfly vertebra, a previously undescribed location, associated with L5-S1 disc narrowing.
Area of Science:
- Spinal anatomy and congenital anomalies
- Radiology and diagnostic imaging
- Orthopedic surgery and biomechanics
Background:
- Butterfly vertebra is a rare congenital vertebral anomaly characterized by a sagittal cleft in the vertebral body.
- While often isolated, it can be associated with genetic syndromes like Alagille, Jarcho-Levin, Crouzon, and Pfeiffer syndromes.
- Typically found in the thoracolumbar spine, its occurrence in the sacrum is unusual.
Observation:
- A case study of a 35-year-old male presenting with chronic low back pain.
- Diagnostic imaging revealed a butterfly vertebra anomaly at the S1 (sacral) level.
- Associated findings included disc space narrowing at L5-S1.
Findings:
- This report describes the first known case of a sacral butterfly vertebra.
- The anomaly was linked to chronic low back pain and L5-S1 disc space narrowing.
- The patient's symptoms suggest a potential link between sacral butterfly vertebrae and spinal biomechanical alterations.
Implications:
- This case expands the known anatomical locations for butterfly vertebrae.
- It suggests that sacral butterfly vertebrae may contribute to chronic low back pain and degenerative disc disease.
- Further research is warranted to understand the biomechanical consequences and clinical significance of sacral butterfly vertebrae.
Related Concept Videos
General Structure of a Vertebra
A typical vertebra, with the exception of the sacrum and coccyx, consists of a body, a vertebral arch, and seven different projections termed processes. The anterior portion of the vertebrae, the body, supports about half the body’s weight. The vertebral bodies progressively increase in size and thickness from the cervical region to the lumbar region of the vertebral column. The intervertebral discs present between the bodies of adjacent vertebrae firmly unites them, forming a continuous column.
Vertebral Column: Regions and Curvature
The vertebral column or spine is a flexible column that supports the head, neck, and body and allows for their movements. It also protects the spinal cord.
Regions of the Vertebral Column
In an adult, the spine is subdivided into five regions: the cervical, the thoracic, the lumbar, the sacral, and the coccygeal region. The spine initially develops as a series of 33 vertebrae; after 20 years of age, the nine bones in the sacral region, five sacral, and four coccygeal bones fuse to form the...
Regions of the Vertebral Column
In an adult, the spine is subdivided into five regions: the cervical, the thoracic, the lumbar, the sacral, and the coccygeal region. The spine initially develops as a series of 33 vertebrae; after 20 years of age, the nine bones in the sacral region, five sacral, and four coccygeal bones fuse to form the...
