Chance fracture

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Chance frac·ture

a transverse fracture, usually in the thoracic or lumbar spine, through the body of the vertebra extending posteriorly through the pedicles and the spinous process.
Farlex Partner Medical Dictionary © Farlex 2012
Described by G.Q. Chance in 1948, a fracture that results in a horizontal splitting of the vertebra that begins with the spinous process or lamina and extends anteriorly through the pedicles and vertebral body which tends to have a wedge compression fracture, while the posterior elements of the vertebra are distracted. Despite the extent of damage to the vertebra, these fractures tend to be stable. They are most common in T12, L1, and L2—the thoracolumbar spine—the junction of the relatively rigid thoracic spine and the more flexible lumbar spine. They were known as 'seat-belt' fractures with the advent of lap seat belts in cars, but are rare as cars are now fitted with shoulder/lap belt combinations. Most Chance fractures seen today are from falls or crush type injuries in which the thorax is acutely hyperflexed. About 50% of Chance fractures have associated intraabdominal injuries, fractures of the pancreas, duodenum and mesentery contusions or rupture which must be surgically assessed
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.


G.Q., 20th century English radiologist.
Chance fracture - a transverse fracture, usually in the thoracic or lumbar spine, through the body of the vertebra extending posteriorly through the pedicles and the spinous process.
Medical Eponyms © Farlex 2012
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References in periodicals archive ?
A transthoracic echocardiogram showed no valvular vegetations, but an abdomino-pelvic computed tomography scan showed an L1 Chance fracture with severe retropulsion, 50% decrease in vertebral body height and changes suggestive of diskitis/ osteomyelitis over T12 and L2 and associated inflammation tissue reaction suggestive of a paraspinal abscess.
Classically, the Chance fracture is a pure-bone injury without ligamentous injury comprising a fracture line through the spinous process, laminae, transverse processes, pedicles, and into the vertebral body.
Temporary use of percutaneous pedicle screw (PPS) placement without fusion can be a treatment option for FDIs, particularly for a pure Chance fracture (which has no ligamentous injury), because removal of the instrumentation after fracture healing could preserve motion segments.
Then there's the Chance fracture, which is a compressive injury to the vertebral body due to a seatbelt injury.
Yang, "One-stage surgery by a combined anterior-posterior approach to treat ankylosing spondylitis complicated by a multiple-level cervical vertebral chance fracture," Modern Rheumatology, vol.
She was riding in a restraint system in the back seat and sustained a Chance Fracture due to the seat belt; the fracture was at the level of L2.
Chance fractures are commonly reported in children; these are posterior transverse fractures through the lumbar vertebral body.
We report a case of combined bony and soft tissue Chance fracture in the thoracic spine, which, to the authors' knowledge, is the first such report in the literature.
Review of the imaging by the orthopaedic team at this time revealed a possible combined bony and soft tissue Chance fracture, with a rupture of the ligamentum flavum at T7/8 and a hyperintense signal in the intervertebral disc at T8/9 on MRI (Figure 1).
Flexion-distraction injuries, also referred to as Chance fractures, are three columnar injuries that involve disruption through the vertebral body and neural arch with varying degrees of posterior ligamentous injury.
Posterior stabilization can be effective with Chance fractures and flexion-distraction injuries that have marked kyphosis, and in translational or shear injuries.
Chance fractures or flexion- distraction Chance variants are strongly associated with potentially life- threatening intra- abdominal injuries.