The CIDP medical abbreviation stands for chronic inflammatory demyelinating polyneuropathy, a rare condition where the body's own defenses harm the protective coating around nerves in the arms and legs. Some sources write polyradiculoneuropathy in place of polyneuropathy; both refer to the same disorder.
People with CIDP often notice slowly increasing weakness and numbness over weeks to months. Because the name is long, neurologists, infusion nurses and physical therapists almost always use the four letters. Below, the long name is split into its parts, followed by how CIDP compares with its faster cousin, Guillain Barre syndrome, and the tests and treatment words that appear in its notes.
At a glance
Stands for
Chronic inflammatory demyelinating polyneuropathyWritten as
CIDP; also expanded as polyradiculoneuropathyUsed in
Neurology, neuromuscular clinics, infusion centers, rehabWhere you see it
Neurology consults, nerve test reports, infusion ordersDo not confuse with
GBS (Guillain Barre syndrome, a fast onset nerve disorder)Specialty
Neurology
The CIDP medical abbreviation meaning, word by word
Each part of the long name tells you something.
| Letter | Word | Plain meaning |
|---|---|---|
| C | Chronic | Lasting or building over a long time, at least about two months |
| I | Inflammatory | Driven by the immune system |
| D | Demyelinating | Stripping away myelin, the fatty sheath that helps signals travel fast |
| P | Polyneuropathy | Disease of many peripheral nerves at once |
The peripheral nerves are those outside the brain and spinal cord. When myelin is damaged, nerve signals slow down or fail, which causes weakness and loss of feeling.
Signs that lead to a CIDP workup
Typical CIDP affects both sides of the body fairly evenly. It can weaken muscles near the trunk, such as hips and shoulders, as well as hands and feet, which helps set it apart from many other neuropathies that start only in the feet.
- Weakness, such as trouble climbing stairs or rising from a chair
- Numbness, tingling or poor balance
- Reduced or absent reflexes, recorded as decreased DTRs
- Fatigue
The course can be steadily worsening or can come and go in relapses.
CIDP and GBS: a timing difference
Guillain Barre syndrome is the acute form of a similar immune nerve attack. The main difference is speed.
| Feature | CIDP | Guillain Barre syndrome |
|---|---|---|
| Onset | Slow, worsening over 8 weeks or more | Fast, usually reaching its worst within about 4 weeks |
| Course | Ongoing or relapsing | Usually a single episode, then recovery |
| Long term treatment | Often needed | Usually not |
Some people first diagnosed with GBS are later found to have CIDP when symptoms keep coming back.
Tests named in CIDP notes
A neurologist usually orders nerve conduction studies with an EMG. These show slowed signals and other patterns of myelin damage. A lumbar puncture (LP) may show raised protein in the CSF with a normal white cell count. MRI of the nerve roots and blood tests that rule out other causes, such as diabetes, vitamin deficiency or abnormal proteins, are also common.
From a consult note: "NCS: diffuse conduction slowing with conduction block, c/w acquired demyelinating process. Impression: CIDP." This means the nerve tests show patterns consistent with an immune demyelinating condition, so the neurologist's impression is CIDP.
Treatment words and what they mean
Treatment aims to calm the immune attack and protect function. Three approaches are widely used: immunoglobulin given through a vein (IVIG) or under the skin (SCIG), corticosteroids such as prednisone, and plasma exchange, sometimes written PLEX, which filters antibodies out of the blood. Physical and occupational therapy help with strength and daily tasks. Many people respond well, and the treating neurologist adjusts the plan over time.
Reading tips for patients and students
In a chart, CIDP may appear with words like typical, variant, relapsing or in remission. Infusion records list the product, dose and schedule. Do not mix CIDP with MS, which damages myelin inside the brain and spinal cord rather than the peripheral nerves. You can find related condition terms in the diagnosis abbreviation collection.
Consider this a guide to the term and its charting. Questions about symptoms, tests or a treatment schedule are best taken to your neurologist or infusion nurse.
Frequently asked questions
What is the medical term meaning of CIDP?
CIDP means chronic inflammatory demyelinating polyneuropathy. It is an immune condition that damages the myelin coating of peripheral nerves, causing weakness and numbness that build over at least two months.
Is CIDP the same as Guillain Barre syndrome?
The two are cousins, not twins. Guillain Barre syndrome comes on quickly and usually happens once, while CIDP develops slowly and tends to continue or relapse.
Is CIDP a type of MS?
No. MS affects myelin in the brain and spinal cord, while CIDP affects the nerves outside them. They are treated differently.
What does IVIG mean in a CIDP note?
IVIG stands for intravenous immunoglobulin, antibodies collected from donated blood and given by vein. It is one of the main treatments used to calm the immune attack in CIDP.