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M40.4 – Other Lordosis: Causes & Treatment
M40.4 is the ICD-10 code for other lordosis – an excessive inward curvature of the spine, typically in the lumbar or cervical region. It may cause back pain and restricted movement.
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M40.4 is the ICD-10 code for other lordosis – an excessive inward curvature of the spine, typically in the lumbar or cervical region. It may cause back pain and restricted movement.
What is M40.4?
The ICD-10 code M40.4 refers to other lordosis – a group of spinal curvature conditions characterized by an exaggerated inward curve of the spine. This code is used when the lordosis cannot be attributed to another specifically coded cause. The most commonly affected regions are the lumbar spine (lumbar lordosis) and the cervical spine (cervical lordosis).
Causes
An increased lordosis can result from various factors:
- Muscular imbalances: Weakness of the abdominal or back muscles leads to poor posture and increased spinal curvature.
- Obesity: Excess weight, particularly in the abdominal area, tilts the pelvis forward and increases lumbar lordosis.
- Pregnancy: Changes in body weight and center of gravity can temporarily cause or worsen lordosis.
- Congenital malformations: Structural anomalies of the vertebrae may predispose individuals to lordosis.
- Postural habits: Prolonged sitting, improper sitting posture, or frequent use of high-heeled footwear.
- Secondary conditions: Other spinal disorders such as kyphosis or spondylolisthesis can lead to compensatory lordosis.
Symptoms
Many patients initially notice the increased lordosis only through a visible hollow back or a forward-tilted pelvis. Common symptoms include:
- Back pain, especially in the lumbar region
- Muscle tension and stiffness in the back
- Reduced spinal flexibility and range of motion
- In severe cases: numbness or tingling in the legs (if nerves are affected)
- Pain during prolonged standing or walking
Diagnosis
Diagnosis of lordosis is established through a combination of:
- Physical examination: The physician assesses posture, spinal alignment, and range of motion.
- X-ray imaging: Lateral X-rays of the spine allow precise measurement of the degree of curvature.
- MRI or CT scan: Used when neurological involvement is suspected or to assess soft tissue structures and intervertebral discs.
- Postural analysis: Specialized measurement methods can quantify the lordotic angle.
Treatment
Treatment depends on the underlying cause and the severity of the lordosis:
Conservative Management
- Physiotherapy: Targeted strengthening of abdominal and back muscles, combined with stretching exercises for postural correction.
- Ergotherapy: Workplace adaptations and everyday aids to reduce spinal load.
- Orthopedic aids: Support corsets or braces may be used in selected cases.
- Pain management: Analgesics or anti-inflammatory medications for acute pain relief.
- Weight reduction: Weight loss is recommended when obesity is a contributing factor.
Surgical Treatment
Surgery is only considered in rare, severe cases, such as when neurological damage is imminent or when conservative measures have failed to provide adequate relief.
Prognosis
With early diagnosis and consistent physiotherapy, the prognosis is generally favorable. Regular physical activity, back training programs, and ergonomic habits in daily life can prevent progression and provide long-term symptom relief.
References
- World Health Organization (WHO): International Classification of Diseases, 10th Revision (ICD-10), Chapter M40 – Lordosis. Geneva.
- Cailliet R: Low Back Pain Syndrome. 5th edition. F.A. Davis Company, Philadelphia, 1995.
- Nordin M, Frankel VH: Basic Biomechanics of the Musculoskeletal System. 4th edition. Lippincott Williams & Wilkins, Philadelphia, 2012.
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