The Lenke Classification System for Scoliosis
What is it?
Scoliosis is typically described as an s-curve of the spine when looking at the patient from the front. For many years, most treatment of scoliosis only focused on this frontal curve. To aid in research, diagnosis and treatment, surgeons developed systems for measuring this curve and classifying its magnitude. For example, the King Classification system identifies five different types of thoracic scoliosis curves.
However, surgeons today understand that scoliosis is actually a more complex, three-dimensional deformity that affects not only the frontal curve of the spine, but also the balance and curve of the spine from front to back (this is known as the sagittal plane) and side to side twisting of the spine (this is known as the axial plane). Dr. Lenke recognized the need for a more complete way of categorizing scoliosis and pioneered a new, more comprehensive classification system. He has worked with a multi-center group of his colleagues to develop this system. He also chairs the Scoliosis Classification Committee and the 3-D Classification Committee for the Scoliosis Research Society.
How does it work?
The Lenke Classification System is simple, accurate, and easy to reproduce and communicate between different surgeons. It relies on measurements taken from standard radiographs (x-rays). In this method, the surgeon evaluates x-rays of the patient from the front, the side, and in bending positions. Each scoliosis curve is then classified in three steps by the region of the spine, the degree or angle of the curve, and the relationship of the side-to-side curve to the sagittal plane. For example, many scoliosis curves impact the presence or absence of kyphosis, which is the outward or convex curve normally found in the upper back. In addition, each aspect of the curve is evaluated for its relative stiffness or flexibility.
Click here to view an illustration of various curve types in the Lenke Classification System.
Lenke Classification Schematic
Click here to view a chart describing the criteria for each curve type.
Lenke Curve Types
Why is it better?
The Lenke Classification System helps surgeons to get a more complete picture of the patient’s condition by understanding the scoliosis as multi-dimensional and considering it from more than one view. This allows the surgeon to focus treatment where it is needed and to optimize the patient’s balance and curve correction from the treatment. Dr. Lenke’s method also gives surgeons a more detailed shorthand for communicating about scoliosis in professional settings, using a widely understood set of criteria. The reliability and comprehensive nature of the Lenke system helps surgeons to participate in research into the best way to treat scoliosis.
Dr. Lenke’s system is widely accepted and is used by a majority of surgeons in the U.S. and throughout the world. It is commonly referenced in professional literature and is taught in surgical training programs everywhere. Dr. Lenke continues to work with other spine surgeons to improve diagnosis, research, and classification methods.
To Learn MoreTo learn more about scoliosis, you are invited to visit the following websites:
http://www.spineuniverse.com/displayarticle.php/article48.html
http://orthoinfo.aaos.org/brochure/thr_report.cfm?Thread_ID=14&topcategory=Spine
www.recoverycare.com (registration is required to access this information, but it is free)
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