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Chronic Inflammatory Demyelinating Polyneuropathy (CIDP)

Condition: Chronic Inflammatory Demyelinating Polyneuropathy (CIDP; also known as Chronic Inflammatory Demyelinating Polyradiculoneuropathy)

Brief Overview: Chronic Inflammatory Demyelinating Polyneuropathy, commonly abbreviated CIDP, is a rare, immune-mediated disorder of the peripheral nerves. The immune system mistakenly attacks components of the peripheral nerves, particularly the myelin that helps nerves transmit signals efficiently. This can lead to muscle weakness, numbness, tingling, impaired balance, difficulty walking, and reduced reflexes.

CIDP typically develops over at least 8 weeks and may follow a steadily progressive, stepwise, or relapsing-remitting course. Symptoms often affect both sides of the body and may involve both proximal muscles, such as the hips and shoulders, and distal muscles, such as the hands and feet. CIDP is treatable, but some patients require long-term therapy to prevent relapse or progression.

Prevalence: Per UpToDate, “The reported prevalence of CIDP ranges from 0.7 to 10.3 cases per 100,000 people. There is a predominance in males, with a sex rate ratio ranging from 1.5 to 4. CIDP primarily affects adults and the incidence rises with advancing age. The typical age of onset is not well established, but some studies have reported mean ages of presentation in the sixth decade.”

Etiology: CIDP is an idiopathic, immune-mediated (autoimmune) demyelinating polyradiculoneuropathy with no single identified cause.

Risk Factors: Per UpToDate, “No specific predisposing risk factors for CIDP have been clearly identified.”

Commonly Associated Conditions:

  • diabetes mellitus
  • monoclonal gammopathy of undetermined significance (MGUS)
  • other autoimmune/immune disorders
  • chronic infections (HIV, hepatitis C)
  • connective tissue diseases

Common Medications:

  • Immune-modulatory treatment: IVIG, plasma exchange, or glucocorticoids
  • Biologics: efgartigimod alfa-hyaluronidase
  • Rituximab or other immunomodulatory therapies
  • Medication for neuropathic pain: gabapentin, pregabalin, duloxetine, venlafaxine

Common Labs, Imaging, and Tests:

  • Nerve conduction studies/EMG
  • Labs: fasting serum glucose, or oral glucose tolerance test, hemoglobin a1c, serum calcium and creatinine, CBC, liver function tests, thyroid function studies, serum protein electrophoresis and immunofixation, serum free light chain assay
  • Lumbar puncture in select patients
  • MRI in select patients
  • Nerve ultrasound
  • Nerve biopsy in select patients

Common Symptoms:

  • Weakness that slowly worsens over 8+ weeks in the arms and/or legs
  • Absent reflexes
  • Foot drop
  • Symmetric limb weakness – typically presents as difficulty walking, climbing stairs, or rising from a chair, plus distal hand/foot weakness
  • Weakness out of proportion to atrophy
  • Gait difficulty, falls
  • Paresthesia, numbness
  • Decreased ability to feel touch, vibration, or position.
  • Neuropathy pain in some
  • Reduced hand strength or difficulty with fine motor tasks.
  • Fatigue

Common Treatments:

  • Medications (see above)
  • Plasma exchange
  • Physical and occupational therapy
  • Assistive devices (cane, walker, wheelchair, shower chair) as needed

Physical Findings:

  • Symmetric muscle weakness affecting both proximal and distal muscles of all four limbs
  • Generalized hyporeflexia or areflexia
  • Large-fiber-predominant sensory loss, with weakness that is disproportionate to any muscle atrophy
  • Legs are generally more affected than the arms
  • Foot drop
  • Reduced grip strength
  • Less common: postural tremor, gait ataxia

Potential Complications and Contraindications:

Potential complications of CIDP include:

  • Progressive muscle weakness.
  • Permanent nerve/axonal damage.
  • Difficulty walking.
  • Falls and fall-related injuries.
  • Loss of independence.
  • Foot drop.
  • Reduced ability to perform activities of daily living.
  • Chronic pain.
  • Fatigue.
  • Mobility-related deconditioning.
  • Psychosocial effects associated with chronic disease and disability.

General Health and Lifestyle Guidance:

  • Keep scheduled neurology and infusion/treatment appointments.
  • Take medications exactly as prescribed.
  • Track changes in strength, walking, balance, sensation, and ability to complete daily activities.
  • Report a noticeable decline in function rather than waiting until the next routine appointment.
  • Use prescribed cane, walker, brace, or other assistive devices consistently.
  • Reduce home fall hazards such as loose rugs, clutter, electrical cords, and poor lighting.
  • Wear supportive, nonslip footwear.
  • Ask for assistance with activities that are no longer safe to perform independently.
  • Participate in physical or occupational therapy when recommended.
  • Perform physical activity according to the healthcare provider or physical therapist's recommendations; avoid pushing exercise to the point of significant exhaustion or unsafe weakness.
  • Maintain adequate nutrition.
  • Follow individualized recommendations for management of diabetes, hypertension, kidney disease, cardiovascular disease, and other comorbidities.
  • Discuss vaccinations and infection-prevention recommendations with your healthcare provider, particularly when receiving immune-modifying treatment.
  • Do not begin supplements marketed for "nerve health" without discussing them with the healthcare provider because supplements may interact with medications or be inappropriate for some patients.

Suggested Questions to Ask Patients:

Symptoms and Function

  • Have you noticed any change in the strength of your arms or legs since our last call?
  • Are you having more difficulty getting out of a chair, climbing stairs, or getting in and out of bed?
  • Have you noticed any change in your ability to use your hands, such as buttoning clothes, opening containers, or holding objects?
  • Has your numbness or tingling changed?
  • Are you experiencing any new or worsening pain?
  • Do your symptoms seem to be improving, worsening, or staying about the same?
  • Have your symptoms affected your ability to bathe, dress, prepare meals, drive, or complete other daily activities?

Walking and Fall Risk

  • Have you fallen or almost fallen since our last call?
  • Are you feeling more unsteady when you walk?
  • Have you noticed your foot dragging or catching when you walk?
  • Are you using a cane, walker, brace, or other assistive device?
  • Do you feel safe getting around your home by yourself?

CIDP Treatment

  • What treatment are you currently receiving for your CIDP?
  • When was your last infusion or injection?
  • When is your next treatment scheduled?
  • Have you missed or delayed any treatments?
  • Do you notice your weakness, numbness, walking, or fatigue getting worse as you get closer to your next treatment?
  • Do your symptoms improve after your treatment? If so, about how long does the improvement last?
  • Have you had any side effects during or after your infusions or injections?
  • Have there been any recent changes to your CIDP treatment plan?

Follow-Up

  • When did you last see your neurologist?
  • When is your next neurology appointment?
  • Are you currently participating in physical or occupational therapy?
  • Do you have any difficulty getting to appointments or receiving your infusions/treatments?
  • Is there anything about your CIDP that is currently making it difficult for you to care for yourself at home?

Suggested Talking Points:

  • CIDP affects the nerves that carry messages between your brain, spinal cord, muscles, and skin. It can cause weakness, numbness, tingling, and balance problems.
  • CIDP is a chronic condition, but treatments can help control the immune activity and improve or maintain strength and function.
  • Something helpful that you can do is pay attention to changes in what you're able to do—not just whether you're having pain.
  • If you're suddenly having more trouble standing, walking, using your hands, or completing your usual activities, please notify your healthcare team.
  • Some people notice that their symptoms begin to return before their next infusion. If you notice a pattern like that, keep track of when it happens so your neurologist can review it.
  • Because CIDP can affect balance and leg strength, preventing falls is especially important.
  • Take your CIDP medications or treatments exactly as prescribed. If you're having side effects or trouble getting your treatment, we can help communicate that to your healthcare team.
  • Your neurologist will usually be the specialist managing CIDP. Keeping regular appointments is important even when your symptoms are stable.

Suggested SMART Goal Examples

    • Symptom Tracking:
      "I will record any changes in my strength, walking, numbness, or balance at least 3 days per week for the next 4 weeks and bring the information to my next neurology appointment."
    • Treatment Response Tracking:
      "For my next three treatments, I will write down how I feel during the week before and after each treatment so I can discuss any pattern of worsening symptoms with my neurologist."
    • Fall Prevention:
      "I will remove loose rugs and clutter from the main walking areas of my home within the next 7 days."
    • Assistive Device Use:
      "I will use my prescribed walker every time I walk outside my home for the next 30 days to reduce my risk of falling."
    • Treatment Adherence:
      "I will attend all scheduled CIDP infusions/injections over the next 30 days and contact my healthcare team if I am unable to attend a scheduled treatment."
    • Physical Therapy:
      "I will complete the home exercises recommended by my physical therapist ___ days per week for the next 4 weeks."
    • Safe Physical Activity:
      "Following my healthcare provider's recommendations, I will complete ___ minutes of appropriate physical activity ___ days per week for the next 4 weeks."
    • Neurology Follow-Up:
      "I will schedule and attend my recommended neurology follow-up appointment within the next ___ days."
    • Home Safety:
      "I will install or arrange for night-lights between my bedroom and bathroom within the next week to improve visibility and reduce my risk of falling."
    • Functional Monitoring:
      "I will tell my care coordinator or healthcare provider if I notice a new difficulty with walking, standing from a chair, using my hands, or completing my normal daily activities during the next 30 days."

Sources:

⚠️ Medical Disclaimer

This resource is provided for educational and informational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. The information presented is general in nature and may not apply to every individual or health situation.

Individuals should consult their physician or other qualified healthcare professional for personalized medical advice, diagnosis, or treatment recommendations related to their specific health conditions and should not begin any new exercise program or change their diet or medications without consulting their healthcare professional.

Call 911 if you are experiencing a medical emergency.