Cervical disc focal sequestration is a specific type of disc herniation in the neck where a fragment of the inner disc (nucleus pulposus) breaks through the outer annulus fibrosus and posterior longitudinal ligament, then completely detaches and migrates into the epidural space. This free fragment is “focal” because it involves a limited portion (less than 25%) of the disc circumference, and “sequestration” because it has lost all continuity with the parent disc, potentially causing intense local inflammation and nerve compression RadiopaediaRadiopaedia.
Anatomy of the Cervical Intervertebral Disc
Structure & Location
Each cervical intervertebral disc sits between two adjacent vertebral bodies (from C2–C3 down to C7–T1) as a fibrocartilaginous joint that allows slight movement and shock absorption. It consists of an inner gelatinous core called the nucleus pulposus, surrounded by layered rings of tough collagen fibers known as the annulus fibrosus WikipediaKenhub.
Origin & Insertion
Although discs are not “muscles,” they attach firmly at their top and bottom surfaces (cartilaginous endplates) to the adjacent vertebral bodies. These endplates anchor the disc and transmit loads between vertebrae, maintaining disc height and alignment WikipediaKenhub.
Blood Supply
In adults, intervertebral discs are nearly avascular. Nutrients and oxygen diffuse through the endplates from tiny capillaries in the vertebral bodies. At birth, vessels penetrate the outer annulus fibrosus but regress early in life, leaving the mature disc reliant on diffusion across its cartilage endplates for nutrition and waste removal KenhubKenhub.
Nerve Supply
Sensory fibers from the sinuvertebral (Recurrent meningeal) nerves innervate the outer one-third of the annulus fibrosus and the posterior longitudinal ligament. These nerves detect pain when discs tear, herniate, or press on adjacent nerve roots KenhubPhysiopedia.
Functions
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Shock Absorption: Distributes compressive forces evenly during movement.
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Spinal Flexibility: Enables small flexion, extension, lateral bending, and rotation.
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Load Transmission: Transfers weight and axial loads between vertebrae.
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Joint Stability: Acts as a fibrocartilaginous ligament holding vertebrae together.
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Space Maintenance: Keeps the intervertebral foramen open for nerve root exit.
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Hydraulic Cushioning: Nucleus pulposus resists compressive stress via its high water content WikipediaPhysiopedia.
Types of Cervical Disc Sequestration
Sequestrated disc fragments in the cervical spine may be classified by their migration path and location:
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Central sequestration: Fragment migrates toward the midline behind the spinal cord.
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Paracentral sequestration: Fragment shifts just off the midline, often compressing nerve roots.
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Foraminal sequestration: Fragment moves into the intervertebral foramen, impinging exiting roots.
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Extraforaminal sequestration: Fragment migrates beyond the foramen into the paraspinal space.
These subtypes guide both symptom patterns and treatment approaches RadiopaediaSpringerOpen.
Causes of Cervical Disc Focal Sequestration
Disc fragmentation in the neck arises from a mix of degenerative, mechanical, and biological factors:
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Age-related disc degeneration
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Repetitive neck flexion/extension
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Heavy lifting or axial loading
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Sudden trauma (e.g., whiplash)
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Poor posture (forward head carriage)
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Smoking-induced disc nutrition loss
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Genetic predisposition to matrix breakdown
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Obesity and metabolic stress
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Vibration exposure (e.g., machinery operation)
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Occupational hazards (e.g., overhead work)
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Micro-tears in annulus fibrosus
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Loss of nucleus pulposus hydration
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Inflammatory cytokine upregulation
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Poor core and neck muscle support
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Previous cervical surgeries
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Autoimmune discitis
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Metabolic disorders (e.g., diabetes)
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Connective tissue diseases (e.g., Ehlers–Danlos)
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Vitamin D deficiency affecting collagen
Symptoms
Patients with focal sequestration may experience combinations of local and radicular signs:
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Sudden severe neck pain
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Pain radiating to shoulder/arm
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Numbness in C5–C8 dermatomes
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Tingling (“pins and needles”)
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Muscle weakness in deltoid/biceps/triceps
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Decreased cervical range of motion
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Headaches originating at the neck base
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Neck muscle spasms
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Reflex changes (e.g., diminished biceps reflex)
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Neck stiffness after rest
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Sensory loss in forearm/hand
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Positive Spurling’s sign
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Shoulder abduction relief sign
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Lhermitte’s sign (electric shock sensation on flexion)
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Gait unsteadiness if myelopathy
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Fine motor difficulty (e.g., buttoning)
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Dropping objects due to grip weakness
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Sphincter disturbance (rare)
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Autonomic changes (e.g., sweating anomalies)
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Sleep disruption from nighttime pain Mayo ClinicVerywell Health.
Diagnostic Tests
A thorough work-up combines clinical and imaging assessments:
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Physical Exam (inspection, palpation)
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Spurling’s Test (root compression)
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Cervical ROM assessment
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Neurological exam (strength, sensation, reflexes)
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X-rays (alignment, degenerative changes)
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MRI (gold standard for sequestration)
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CT Scan (bone detail, ossification)
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CT Myelogram (if MRI contraindicated)
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Discography (reproduction of pain)
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EMG/Nerve Conduction (radiculopathy evaluation)
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Somatosensory Evoked Potentials (spinal cord function)
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Motor Evoked Potentials
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Dynamic (flexion/extension) X-rays
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Ultrasound Elastography (experimental)
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Laboratory Tests (inflammatory markers)
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Bone Scan (rule out infection/tumor)
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CT-guided nerve root block (diagnostic analgesia)
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Digital Motion X-ray (kinematic study)
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Red-flag screening labs (CBC, ESR, CRP)
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Clinical prediction rules (e.g., NEXUS criteria) NCBIRadiopaedia.
Non-Pharmacological Treatments
Conservative care focuses on pain relief, function, and prevention:
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Cervical traction therapy
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Physical therapy (stretching/strengthening)
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Posture correction programs
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Ergonomic workstation adjustments
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Heat and cold therapy
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Transcutaneous Electrical Nerve Stimulation (TENS)
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Acupuncture
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Massage therapy
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Chiropractic manipulation (with caution)
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Cervical stabilization exercises
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McKenzie extension protocols
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Yoga and Pilates
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Core strengthening
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Water-based (aquatic) therapy
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Myofascial release
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Ultrasound therapy
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Spinal decompression tables
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Soft cervical collar (short term)
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Biofeedback relaxation
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Cognitive-behavioral therapy
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Dry needling
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Electromyographic biofeedback
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Lifestyle modifications (smoking cessation)
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Weight management programs
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Nutritional support (anti-inflammatory diet)
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Ergonomic driving supports
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Sleep posture optimization (cervical pillows)
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Progressive aerobic exercise
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Vestibular rehabilitation (if balance affected)
Pharmacological Options
Medications target pain, inflammation, and nerve irritation:
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NSAIDs (ibuprofen, naproxen, diclofenac)
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Acetaminophen
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COX-2 inhibitors (celecoxib)
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Oral corticosteroids (prednisone taper)
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Muscle relaxants (cyclobenzaprine, tizanidine)
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Opioids (tramadol, codeine; short-term only)
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Gabapentin
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Pregabalin
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Duloxetine
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Amitriptyline
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Nortriptyline
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Topical NSAIDs (diclofenac gel)
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Lidocaine patches
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Capsaicin cream
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Oral bisphosphonates (adjunct in osteoporosis)
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Vitamin D supplementation
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Calcitonin nasal spray (in select cases)
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Epidural steroid injections (cervical)
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Selective nerve root blocks (local anesthetic + steroid)
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Disease-modifying anti-rheumatic drugs (rarely, if autoimmune) NCBIMayo Clinic.
Surgical Procedures
Surgery is reserved for persistent, severe, or progressive cases with neurologic compromise:
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Anterior Cervical Discectomy & Fusion (ACDF)
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Cervical Disc Arthroplasty (Artificial Disc Replacement)
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Posterior Cervical Laminoforaminotomy
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Microsurgical Posterior Decompression
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Anterior Corpectomy & Fusion
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Posterior Laminectomy & Fusion
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Cervical Laminoplasty
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Percutaneous Endoscopic Cervical Discectomy
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Anterior Microforaminotomy
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Minimally Invasive Cervical Discectomy NCBISpringerOpen.
Prevention Strategies
Maintaining neck health and minimizing risk of sequestration involves:
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Ergonomic workstation setup
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Regular posture breaks (every 30 minutes)
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Correct lifting techniques
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Maintaining healthy body weight
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Daily neck and core strengthening
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Smoking cessation
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Adequate hydration
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Balanced diet rich in anti-inflammatory nutrients
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Proper sleep ergonomics (neck support)
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Protective gear in contact sports Mayo ClinicVerywell Health.
When to See a Doctor
Seek prompt medical attention if you experience:
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Severe, unremitting neck pain that worsens at rest or night
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Progressive arm weakness or numbness
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Loss of hand dexterity or gait instability
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Bowel or bladder dysfunction
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Signs of infection (fever, chills) with neck pain
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Sudden, severe headache with neck pain (rule out vascular causes) NCBIMayo Clinic.
Frequently Asked Questions
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What exactly is “focal sequestration”?
Focal sequestration means that only a small, localized portion of the disc’s inner gel has broken free, forming a separate fragment in the spinal canal that no longer connects to the original disc. -
How is this different from a simple bulging disc?
A bulge involves the disc staying intact but bulging outward. In sequestration, a fragment tears completely free, causing more intense symptoms. -
Can a sequestered fragment reabsorb on its own?
Yes. Over weeks to months, the body can break down and reabsorb small fragments, relieving pressure naturally. -
What imaging is best?
MRI is the gold standard for visualizing sequestered fragments and their exact location. -
Are blood tests useful?
Only to rule out infection or inflammation; they don’t confirm sequestration. -
Will physical therapy make it worse?
A guided, gentle program avoids aggravation; aggressive maneuvers should be avoided until acute pain subsides. -
Is surgery always needed?
No. Most cases improve with conservative care unless there is severe neurologic compromise. -
What are the risks of epidural steroid injections?
Minor risks include headache, bleeding, or infection; serious complications are rare. -
How long does recovery take?
Many improve in 6–12 weeks. Surgical recovery may take 3–6 months for full function. -
Can I prevent recurrence?
Yes—through ongoing posture control, exercise, and avoiding high-risk activities. -
Does age matter?
Degenerative changes with age increase risk, but younger patients can also sequester fragments after trauma. -
Is pain more severe than a herniation without sequestration?
Often yes, because free fragments can inflame surrounding nerves and tissues. -
Can sequestration cause spinal cord compression?
In central lesions, yes—this may lead to myelopathic signs requiring urgent surgery. -
Should I use a neck collar?
Short-term bracing may ease pain but prolonged use can weaken muscles. -
What lifestyle changes help long-term?
Regular low-impact exercise, ergonomic adaptations, and core/neck muscle strengthening sustain disc health.Disclaimer: Each person’s journey is unique, treatment plan, life style, food habit, hormonal condition, immune system, chronic disease condition, geological location, weather and previous medical history is also unique. So always seek the best advice from a qualified medical professional or health care provider before trying any treatments to ensure to find out the best plan for you. This guide is for general information and educational purposes only. Regular check-ups and awareness can help to manage and prevent complications associated with these diseases conditions. If you or someone are suffering from this disease condition bookmark this website or share with someone who might find it useful! Boost your knowledge and stay ahead in your health journey. We always try to ensure that the content is regularly updated to reflect the latest medical research and treatment options. Thank you for giving your valuable time to read the article.
The article is written by Team Rxharun and reviewed by the Rx Editorial Board Members
Last Updated: May 01, 2025.
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